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Meet the astronomers. See where they work. Know what they know.


The Project:

The Cosmic Diary is not just about astronomy. It's more about what it is like to be an astronomer.

The Cosmic Diary aims to put a human face on astronomy: professional scientists will blog in text and images about their lives, families, friends, hobbies and interests, as well as their work, their latest research findings and the challenges that face them. The bloggers represent a vibrant cross-section of female and male working astronomers from around the world, coming from five different continents. Outside the observatories, labs and offices they are musicians, mothers, photographers, athletes, amateur astronomers. At work, they are managers, observers, graduate students, grant proposers, instrument builders and data analysts.

Throughout this project, all the bloggers will be asked to explain one particular aspect of their work to the public. In a true exercise of science communication, these scientists will use easy-to-understand language to translate the nuts and bolts of their scientific research into a popular science article. This will be their challenge.

Task Group:

Mariana Barrosa (Portugal, ESO ePOD)
Nuno Marques (Portugal, Web Developer)
Lee Pullen (UK, Freelance Science Communicator)
André Roquette (Portugal, ESO ePOD)

Jack Oughton (UK, Freelance Science Communicator)
Alice Enevoldsen (USA, Pacific Science Center)
Alberto Krone Martins (Brazil, Uni. S. Paulo / Uni. Bordeaux)
Kevin Govender (South Africa, S. A. A. O.)
Avivah Yamani (Indonesia, Rigel Kentaurus)
Henri Boffin (Belgium, ESO ePOD)

Reflections on Galileo

Paul Schenk, a scientist who like me is interested in the Galilean moons of Jupiter, works at the Lunar and Planetary Institute and helps put together their Lunar and Planetary Information Bulletin.

When I was there last month he asked if I could contribute an article about Galileo. You can see it in the most recent issue – see:
Lunar and Planetary Information Bulletin

I was thinking of publishing the whole thing here, but you’d probably enjoy reading the other features of this newsletter as well, so go to that site and download it. (It comes as a PDF file. You can also subscribe to it, and have a message appear in your email box every month when a new issue is ready for download.)

December 6th, 2009 | posted by Brother Guy Consolmagno in Daily life, Philosophical musings, Science explanation

At the Lunar and Planetary Institute

Most of my posts, I notice, seem to involve travel. In fact I spend six months of each year on the road; I guess you have to see the world, in order to see the universe.

The trip this time is to Houston, Texas, where I gave a public lecture on “Astronomy, God, and the Search for Elegance” on Thursday night, and then a seminar on my research into the physical properties of meteorites on Friday. Both were held at the Lunar and Planetary Institute, a NASA-funded (but private) institute up the road from the Johnson Space Center, dedicated to planetary sciences research.

As is typical, the rest of Friday was spent moving from office to office, hearing from a list of folks about their research and telling them a little about mine. In the process, I heard about evidence for and against life on Mars; the dream of orbiting a newer, high-resolution radar to Venus and what it could show us that the Magellan spacecraft missed; a bizarre Antarctic meteorite that is an anything-but-ordinary chondrite; chemical models for the atmosphere of Jupiter that build on, but greatly extend, stuff I first learned about 40 years ago; the first detailed study of a Moon meteorite that was in fact found nearly 30 years ago but never well characterized; and more. I spent one hour planning new work with a colleague whom I am working with to characterize Moon rocks the way that we’ve been studying meteorites up to now.

At the same time, I heard about growing families; the problems of non-Americans dealing with US government paperwork; the struggle of young scientists trying to explain to their parents, or their skeptical colleagues, how they can be scientists and still go to church. (Sigh! Why is this still an issue? We do it; if you can’t understand, at least don’t criticize.) In other words, I never just wear one hat when I meet my fellow astronomers. I listen to science, and to scientists.

But that’s not just true of me because I am a Jesuit; that’s true of all of us. Because science is done by people who are our friends (or enemies!), in a tight network of personal connections and relationships. The curator of NASA’s extraterrestrial materials is a fellow I went to graduate school with (and had dinner with, last night). The young postdoc I saw yesterday afternoon got his PhD under a director who was an undergraduate with me at MIT 40 years ago. The room we were chatting in was named for the late Tom McGetchin, who taught us geophysics at MIT back then.

So every visit to a lab, every scientific meeting, is also a time to renew old acquaintances and hear the next chapters in everyone’s lives. It reminds me that astronomy is not just images and equations. It is played out in the imaginations of human beings; it is not merely about the universe, but about the understanding of that universe in the minds of us human beings living within that universe. That’s all of us.

November 21st, 2009 | posted by Brother Guy Consolmagno in Daily life, Philosophical musings

Roman Holiday

I am just back to Syracuse (NY) [where I am teaching a cosmology course this term at LeMoyne College] from two days in Rome (Italy). For my non-New Yorker readers I point out that there is also a Syracuse (Italy) and a Rome (New York), neither of which I saw this trip.

The event was the opening of the Vatican’s display of antique astronomical instruments, gathered from observatories across Italy (including ours and the Vatican Museum) in honor of the International Year of Astronomy. The gathering was also an official opening of our new headquarters in the Papal Gardens. About 75 astronomers from Italy and around the world, including a number of impressive names, gathered on Friday at the headquarters of the Pontifical Academy of Sciences (a lovely building in the gardens behind St. Peter’s) to hear a presentation from John Huchra, president of the American Astronomical Society, on telescopes past and future.

Then, after a bit of coffee, we walked over to the audience halls of the Vatican (on a path that takes you underneath the Vatican Museum and past the Sistine Chapel, which is not quite as impressive on the outside as it is on the inside!) where Pope Benedict XVI greeted the astronomers and said a few words about astronomy. He’s all for it!

(See the IYA web site report here)

After lunch in the Pope Paul VI auditorium, we then split into three groups to do a round-robin tour of the new exhibit, the Sistine Chapel, and the Tower of the Winds. My task was to be the tour guide to the Tower, so I didn’t get to see the other spots. (I’ve seen the Sistine Chapel a few times now, and I’ll be back in January to get a look at the exhibit.) So for three times, a secretary from the Archives and I led groups up the stairs to the Tower of the Winds. Yes, stairs. Quite a few of them; it is a tower, after all. After that, we went into the “Secret Archives” where you can see a bit of the 85 kilometers of shelving. (The name is a bad translation of the Italian which would be better put as “Private Archives” — the root word is the same as in “secretary” not “top secret.”)

For your assignment at home: how many terabytes does 85 linear kilometers of shelving represent?

On Saturday, the group came by bus out to Castel Gandolfo. Fellow Specola Vaticana astronomers Fr. Chris Corbally SJ (from Britain) and Fr. Paul Gabor SJ (from the Czech Republic) and I led three groups on a tour through the Papal Gardens — this took about an hour and a half, and we only saw half of them — ending up at our new headquarters. We were going to do a formal tour of our library, rare books, and meteorites but by then everyone was exhausted so we just let people wander while we served a four course pranzo in our cobblestone courtyard. The weather (in the upper teens Celsius, and sunny) was almost as good as the food.

The group left at around 2:30; by 4:00 I was in the car heading back to the airport. And today I have two classes to teach at LeMoyne College.

November 2nd, 2009 | posted by Brother Guy Consolmagno in Daily life

Travel, travel

It seems odd to say this on a day when I am about to get on a plane back to Rome, but I am finally finished with most of my travel for the year, and settled into my last gig of the season, teaching a course called “Dynamic Evolution” at LeMoyne College in Syracuse, NY.

The past two months have been hectic to say the least… they included five days in Braga, Portugal, at a meeting on Darwin (the person, not the spacecraft mission) that coincided with a gathering of the European Jesuits in Science; then a visit by the Pope to our new headquarters in Rome (if I were clever I would include a link to the YouTube video; try Pope Visits Vatican Observatory or just go to YouTube and search on Vatican Observatory to see me chatting with The Boss); then talks in London, England… Lille, France… Nashville, Tennessee… Pensacola, Florida… Orlando, Florida… the annual meeting of the Division for Planetary Sciences of the American Astronomical Society in Puerto Rico… a science fiction convention (and several astronomy presentations) in Detroit… a talk in London, Ontario (where it snowed while I was there, in mid October!)… and a star party in Atlanta (which was cold and rainy, alas.)

My course here at LeMoyne, a small Jesuit university in upstate New York, is fascinating for me because I am definitely teaching outside of my “comfort zone”. The first half of the course was by a brilliant Belgian Jesuit theologian, Jan Lambrecht, who talked about the cosmology of St. Paul as seen in his various letters. Now I have taken over, and we’re reviewing the cosmology of the middle ages (I am using CS Lewis’ book The Discarded Image) as a segue into a discussion of modern cosmology, including quantum theory and relativity.

It is kind of scary teaching a course where I can’t just write equations on the blackboard (whiteboard, nowadays). The students also have a wide variety of backgrounds, so some already know the physics and other already know the history…

October 28th, 2009 | posted by Brother Guy Consolmagno in Daily life

One last word about Pluto…

I suspect I am letting myself in for it by posting this, but someone has to say it…

Before the IAU meeting this past month in Rio, I received several emails from impassioned folks offering petitions to try to get Pluto “reinstated” as a planet. Needless to say, that was the farthest from anyone’s mind at the IAU. But because these petitions reveal a deep misunderstanding of what science is in general, I thought I would pass on a few comments here.

I have written at length about the whole Pluto controversy elsewhere (see “What happened to Pluto?” in The Physics Teacher, 45, 14-19) and I don’t want to repeat any of that information here. Instead, I want to examine some of the hidden incorrect assumptions that the petition-forwarders have about who the IAU is, what we do, and why we do it.

First misunderstanding: They seem to think that science is about “facts”. The petitions argue about the “fact” of Pluto’s status, i.e. where it sits in a list in a textbook. But the science of astronomy is not at all about lists or textbook facts. Those lists are what precocious 8 year old children love to memorize; that is no longer what is of interest to the rest of us. As astronomers, we want to understand what’s in the universe, and how it got to be the way it is today. In order to do this work, we must work in international communities and we must have a common language to describe the things we’re looking at. That’s why the IAU exists: to facilitate our work.

For example, a few years ago — just before the 2006 IAU reclassification — I was curious if the spin rates and light curves of distant objects in the solar system could be reliably connected to their densities and internal structures. (It turns out to be more complicated than “yes it works” or “no it doesn’t,” which is precisely what I was trying to work out.) As part of that work, I needed to consult tables — yes, lists of “facts” — that contained the data I needed for the objects I needed. But notice, I wasn’t interested in the facts themselves — they were already known — but how those facts could be used to tell me about what was going on in the solar system.

Clearly in doing this work I had to consider a whole range of objects, including the largest of the TNOs. At that time, however, neither Pluto nor several of the other Pluto-sized objects were in those tables since it wasn’t clear what status they had. When there was only one Pluto, that was simple enough; I could look it up separately. But in a rapidly changing field where new such objects were being found all the time, I had no idea if I had a complete set of all of them, including some of the most important examples of the class of object I was looking for.

Second misunderstanding: The IAU is an authority on “what is a planet” similar to the authority of a government or a church. If that were true, then understandably its decisions would matter to everyone; and so everyone involved ought to have a say about those decisions. Certainly that is the way the IAU decision was described in the popular press. But, operatively, this is just not true. The IAU has no desire to define “facts” for the rest of the world. It has neither the authority to do so, nor the power to enforce any such decisions.

All the IAU decided back in 2006 was to figure out which of two different sets of committees would be responsible for handling the nomenclature and the listing of data on orbits and other physical properties. Up to that time, Pluto’s data were not included in the listings of the Minor Planet Center. After that decision, Pluto and the other bodies fitting the Dwarf Planet definition, some of which are larger than Pluto were each given a minor planet number and each body’s data were listed among all the other similar bodies in the MPC database. By all accounts, and as the subsequent three years’ practice has shown, this makes perfect sense. The kind of data listed in this database is precisely what I needed, for example, in the task I described above.

In a similar way, after 2006 the task of approving a common name to be used for the other newly discovered dwarf planets was regularized, to be handled jointly by both the committee in charge of planet and moon names (the Working Group of Planetary System Nomenclature) and the committee in charge of minor planet names (the Committee on Small Body Nomenclature).

(Why are there two different nomenclature committees? Because the constraints and needs of the two different kinds of bodies are very different. The WGPSN has to understand both its complex naming conventions — which planets have which type of names — and the differences between different kinds of geological features that are getting named. Small bodies, on the other hand, don’t have to worry about that kind of geology; instead they have a different set of constraints — what naming conventions are followed for bodies based on their orbital characteristics, for example — that are very different from those of the planetary group. Incidentally, when there are geological features to be named on small bodies, it is the WGPSN that handles that, not the CSBN.)

In other words, the 2006 IAU decision about Pluto was a purely internal administrative decision, about what kind of classification was most practical and most useful for the astronomers using the IAU databases, and who would be in charge of maintaining those databases.

And so there are several reasons why the well-meaning “petitions” about Pluto miss the mark.

They seem to think that Pluto’s status is a “fact” of great importance. Worse, they imply that these “facts” can be decided by popular vote.

Likewise, what these petitioners are implying (without realizing it) is that even though they don’t actually use our data on a daily basis like we do, nonetheless they somehow have the right to tell us how to sort our data, based not on our practical needs but on their emotional desires.

And they put way too much authority on the shoulders of the IAU, treating us as if we were some sort of College of Cardinals. It really bothers me when people want to turn being a scientist into a kind of “priesthood” with an authority that we neither have nor desire to have. It falsifies both what it means to be a priest and what it means to be a scientist. And I find that very upsetting… maybe because I work at the Vatican Observatory, where I see real priests, and real scientists, every day!

September 3rd, 2009 | posted by Brother Guy Consolmagno in Daily life, Philosophical musings

IAU: The Worldcon of Astronomy

When I was a student, lo these many years ago, I started going to science fiction conventions and really enjoyed the excitement of seeing so many people I had heard of and read, all in one place. When I went to my first science conference, I realized that it could be even more exciting.

Then, when I became a graduate student and started presenting my own work at such conferences, they stopped being so much fun. It felt much more like every talk was a final oral exam. It was only as I got older, and more confident in my work (and less worried about having a job the next year), that I learned to enjoy science meetings again.

And then, about twenty years ago, I started going back to science fiction conventions as well. Now both kinds of events are fun, for much of the same reason: I get to meet old friends who also happen to be the folks giving the kinds of presentations that thrilled me when I was younger. I am far enough along in my field that I personally know a lot of big name scientists, and big name science fiction writers. And yet I am enough of a fanboy to still feel a thrill at being able to say that I know them!

So, while a good number of my friends are partying at the World Science Fiction Convention in Montreal this weekend, I am in Rio de Janeiro, attending the General Assembly of the International Astronomical Union. It’s like the Worldcon of Astronomy!

The IAU GAs are unlike any other scientific convention I have attended, in that half of what goes on here is politics… the boring but essential kind of politics, where a lot of arbitrary decisions are made over matters that can be tedious (but are sometimes fun); usually not important in themselves (the world won’t end if we don’t make the best possible decisions) but which do have to be decided, one way or another. Some of the stuff that I have encountered in the commissions I belong to (C16, Planets and Satellites; C15, Comets and Minor Planets; C22, Meteors, Meteorites and Interplanetary Dust) include the first official names of meteor showers and the definition of the standard equation to be used to extrapolate the brightness of asteroids observed at a variety of phase angles, to the value at zero phase angle. Somehow none of that quite has the public pizzazz of Pluto! But it is all important to the way we do our work.

Since the tiny nation that pays my salary (if I had one) likes to be recognized as a nation, it feels strongly that it should be represented at the IAU. So every three years they pay me to travel to some fun or exotic location. 1997: Kyoto, Japan. 2003: Sydney, Australia. 2006: Prague, Czech Republic. 1994: The Hague, The Netherlands. 2000: Manchester, England. (Don’t make that face, I really enjoyed Manchester. It reminds me a lot of my home, Detroit, a sports-mad blue collar town that gets no respect from the rest of the world…)

Since I actually show up to these things regularly, I wind up getting elected to posts and appointed to committees. The most fun, to me, is sitting on the Working Group for Planetary System Nomenclature. We get to approve the proposed names of craters on Mercury or plains on Venus; anything to do with a planet. (Another committee handles comets and asteroids. That’s why we needed a definition to divide the two groups, so we’d know who gets to name the new Pluto-sized things being discovered nowadays!)

And to my friends in Montreal this weekend… this past year, we named a crater on Mars for Isaac Asimov, and approved the theme for the dune-filled plains of Titan as “names of planets in the Dune series.” I’ve done my part to keep SF alive in the not-fictional but scientific, and just as exciting, universe.

August 8th, 2009 | posted by Brother Guy Consolmagno in Daily life

Why the IYA? A Midterm reflection

I wrote the following for the (UK) Times Education Supplement, who ran it a month ago, and I thought perhaps readers of the Cosmic Diary might be amused…

One of the odd side-effects of being an astronomer at the Vatican Observatory is that we often get elected to various positions in professional astronomical societies. It may be the special respect that our fellow scientists have for the Vatican; or, more likely, the fact that we don’t have to spend a large part of our days writing grant proposals (in competition with everyone else) to fund our research means that, unlike most astronomers, we have the free time to spend on these important but time-consuming offices.

Whatever the reason, it has meant that for the past few years I have been watching the buildup to the IYA — the International Year of Astronomy — from the vantage point as a past president of Commission 16 (Moons and Planets) of the International Astronomical Union, and as chair of the Division for Planetary Sciences of the American Astronomical Society. Dedicating a year to promoting astronomy seemed like a sort of “motherhood” proposition; who could possibly be against it? (Plus, it made a nice break from all those arguments about Pluto.) My organizations both happily endorsed it.

But for that same reason, it also felt like a sort of pointless task. Everyone already likes astronomy; why do we need a special year to promote it? What’s more, astronomy is perhaps already too accessible to the general public. While you need a clever lecturer to fool you into thinking that you can understand, say, the Theory of Evolution, anyone can download for themselves all those glorious astronomical images. No need to leave your couch and go to your local science museum.

In Britain, at least, some of those concerns are probably well founded. Here we astronomers have been in competition with the Darwin Centennial; and compared to Darwin, the astronomers have neither the “hook” of celebrating a local hero nor the cachet of controversy to draw people to our events. One museum director recently bemoaned to me the fact that Darwin lectures at his institution have drawn loud crowds, while astronomy talks are a much harder sell.

(Galileo, whose telescope is being celebrated by the IYA, is of course a much bigger hero in Italy. Perhaps ironically, it’s the Vatican that has most forcefully celebrated him as a local celebrity: a great thinker and good Catholic, who didn’t let the opposition of certain of his contemporaries tarnish either his science or his faith. His two daughters, after all, were both nuns; and he wrote and published some of his greatest scientific work after his infamous trial.)

The real impact of the IYA, however, first struck me at the opening ceremonies last January. At the Paris headquarters of UNESCO, representatives of astronomy from every nation in the UN — scientists and museum directors and students — were gathered to celebrate the Year with talks and seminars and social events. I was one of the Vatican’s official representatives, wandering the hallways for several days in my formal suit and clerical collar.

Now, contrary to the popular cliché, the usual working attire of a Jesuit brother and scientist is neither a clerical shirt nor a white lab coat. As an American of a certain generation, I chose science as a career in no small part because it allowed me to go to work in jeans and a tee-shirt. Wearing a suit, never mind a clerical collar, made me feel like a child dressed up for Halloween.

It’s not that I am ashamed of my religious life; quite the contrary. I am equally proud to be a graduate of the Massachusetts Institute of Technology, and equally uncomfortable wearing my “Brass Rat”, the bulky MIT class ring. But, yes, I’ll admit I did have a fear that people who didn’t know me might see simply the uniform and not the person wearing it.

My fellow astronomers are perfectly comfortable with me having a religious life. It turns out, a lot of them are active churchgoers, too — something they told me only once I had come out of the religious closet myself by joining the Jesuits. But I am, frankly, bored by journalists and members of the public who want to know how I can “reconcile” my science and my religion. And, yes, I did get at least one comment from an attendee at the IYA Opening Ceremonies wondering what “someone like you” was doing there.

But when I looked around, I found I was not alone. Right near me was a man wearing a yarmulke; over there, a young woman in a hijab. We were from all nations, all cultures; all religions. We were all children of the same universe, all made from the same star dust. We all share the same sky. How dare anyone tell us that we can’t be astronomers, that we can’t all love the stars and study the skies, just because we happened to delight in our different religious beliefs?

But, of course, this was not the first time I had needed to learn this lesson.

Many years ago, long before I joined the Jesuits, I had been a postdoctoral fellow at MIT working on computer models to predict the internal evolution of the icy moons of Jupiter and Saturn. But I would go home at night, and lie awake in my bed at 3 am, wondering if this wasn’t just an enormous waste of time. Why should anyone care about the moons of Saturn when there were people starving in the world? How could I find making these computer models, which only a handful of people would ever study, a worthwhile center of my life?

I had no answer. And so I quit my life as an astronomer, cleaned out my office, and went to join the US Peace Corps. I would go anywhere they sent me, I told them; I’d do whatever they asked me to do. I was there to serve people, not some inhuman computer screen. They happily took me in, taught me some Swahili, and within three months I was in Kenya… at the University of Nairobi, teaching graduate students astronomy.

There was a certain logic to that job. I learned in Kenya that there is a word to describe people who lived “close to nature”: starving. People were indeed hungry in Kenya at that time, suffering through one of its periodic droughts. And I realized that, for all the ills of a technological society — pollution, alienation, the greed that comes with affluence — nonetheless in the course of human history it’s only the technologically sophisticated societies that have been able to feed their populace on a regular basis.

A technologically sophisticated society needs an educated populace. That means schools. And schools need teachers. The students I was training in physics and astronomy all had jobs waiting for them at the Kenya Science Teacher’s College, to teach the teachers who would teach the students who (we hoped) would one day make the power grid in Kenya just a little more reliable. Astronomy was an easy way to teach the physics.

But that wasn’t why they wanted me to teach them astronomy.

I spent a good amount of my time in Kenya out of the city, up country, visiting the schools where my fellow Peace Corps volunteers were working… schools with no windows in the windows, no black on the blackboards. I would show my slides of spacecraft images (did you know there are slide projectors that can run off automobile batteries?) and at night I would set up my little telescope. Everyone in the village would line up to look at the craters on the Moon, the rings of Saturn, the moons of Jupiter.

The enthusiasm, the awe, the sheer joy in their faces was very familiar. It was the same look I would see when I set up the telescope to look at those very same objects back home in America. Of course, the skies in Kenya were much darker, free of factory and light pollution. The improved conditions left me in awe, as well.

Then it finally occurred to me… no well-fed cow bothers to look through a telescope. No cat or dog, no matter how clever, is interested in seeing the images that spacecraft have sent us. People are interested in astronomy precisely because they are people. It is a human response to a human urge. Feeding that urge feeds our humanity. The people in Iten, Kenya, were as hungry for this as the people of Lexington, Michigan. It is a hunger for more than food. It is literally true: a human being does not live by bread alone.

And to deny someone the chance to share in what the human race has found out about this universe, just because they happened to be born on the wrong continent or to the wrong socio-economic group, is a crime against their humanity.

That, ultimately, is what the International Year of Astronomy is all about. That is why we are reaching out around the world, with low-cost telescopes and podcasts and books and lectures.

But that raises a bigger question. What I’ve said so far about stargazing could equally be said about any peculiarly human activity — music or literature or dance. Why, in particular, astronomy?

The roots of my passion for astronomy draw from many sources. Certainly growing up during the age of Sputnik and Apollo played its role. So did summers spent under dark skies around the Great Lakes, and the love of a father who first taught me the constellations.

But my passion for the study of the stars also draws on my religious tradition, on my belief in a Creator who made this world. He made it deliberately: “God said, let there be… and there was…” He made it rationally: “In the beginning was the Logos.” He made it out of love: “God so loved the world that He sent his Only Son.” This means that to love the stars is an act of worship of their Maker. To puzzle out how they all work is a way of becoming intimate with the mind of that Maker. I have found no better answer for those 3 am ponderings of the meaning of my life.

Others astronomers have different motivations of course, as different as the religions we follow… and as similar. Sometimes it is hard to remember, when we get tied up in proposal writing and trying to establish priority for our papers or our discoveries, but it is hard enough to make a living at astronomy that anyone who does so, must do it out of a deeper passion. Whether it is a curiosity about the truth or a delight in its beauty, our motives for studying the universe are ultimately rooted in our deepest desires, in pursuing that which we value most highly. And is that not a definition of religion?

Yes, we professionals can forget all that in the day-to-day struggles of grantsmanship and office politics. But when we engage the world of amateur astronomers at IYA events this year, we are reminded by them of why chose to do this stuff in the first place. And maybe that reminder is why we professionals need the IYA, too.

It’s not about prestige. Who can feel important in the face of the Milky Way? It’s not about conflict and controversy. Those artificial disputes are boring, compared to capturing the sight of the Ring Nebula in your own little telescope. It’s not about the money spent on spacecraft, but on the excitement that we feel when we see their images of worlds different from our own… and about the new way we suddenly look at our own world, once we have another place to compare it to. It’s not about a national hero, but a human hunger.

We all live and play in this same universe. It’s the arena of our lives, common to every one of us; it is our mutual neighbor. And, as e. e. cummings pointed out many years ago, it’s a hell of a good universe next door; let’s go.

July 19th, 2009 | posted by Brother Guy Consolmagno in Philosophical musings

Super-VOSS

My intention was to blog once a week; my expectation was once a month; it’s now been two months. Oh, dear.

Since I last left the lab at BC, I… visited my goddaughter (and her new brother) in London; attended a fantastic conference on Bolides and Meteoroids in Prague; got back to Rome in time to pitch in on the big move of our headquarters from the old Papal Palace to a real palace (I am now sitting in air-conditioned comfort in a large lab and office with a garden out my window); flew up for two days visiting CERN as an official representative of the Vatican (diplomat class gets you even more perks than “executive platinum” frequent flier miles, but it is much lonelier — I never got a chance to buy Swiss Chocolate in the airport); celebrated the retirement of a long-time solar astronomer and history of astronomy expert, Fr. Juan Casanovas, who has taken up new work in Spain (he’s only 81); flew back to New York for the World Science Festival, where my comments got me misquoted in the Wall Street Journal; visited my sister and my grand-nieces in New Jersey; flew back to Rome for still more moving; and attended SuperVOSS

SuperVOSS is the irregularly-scheduled reunion of students from the Vatican Observatory Summer School (VOSS) which we’ve been holding more or less every two years since 1986. There are nearly 300 alums now, and about 60 of them made it to this reunion. More than just a party, it was a week long conference with reviews of all the different astronomy people have been up to, during the mornings, and discussions of astronomy and the popular cultures we all come from, in the afternoons. Both were fantastic.

Our summer schools take 25 students (out of some 200 applicants) from all over the world to spend four weeks of intensive study in some aspect of astrophysics; the topic varies from school to school. For example, we have done Brown Dwarfs and Exoplanets, Astrobiology, Galaxy Evolution, Cosmology… teaching the schools are instructors from Big Name places around the world (Harvard, Oxford, Max Planck, Arizona). The only rule for students is that they must show evidence of pursuing a career in research astronomy, and no more than 2 can come from any one nation. The school is free. Two thirds of our students come from the developing world, and about half have been women. The students learn astronomy at the highest level; they also make lifelong friends and collaborative associations, and — more immediately important — they get to know astronomers from those Big Name places who can write letters of recommendation to get them into Big Name places themselves!

The results of all this were well in evidence at the SuperVOSS. Students from 20 years ago are now themselves professors at Big Name spots (ESO, Arizona, Toronto, Chile) and they now teach the schools. In fact, this superVOSS was organized entirely by alumns from the school. And listening to their reviews of topics from galaxy evolution to meteor streams made me realize how wonderful it is when you see someone who you knew as an eager undergraduate, who you can now appreciate as an expert going well beyond where you once were… this education thing, it works!

For more about the 2010 VOSS, check out http://vaticanobservatory.org/VOSS.html

And I hope this entry gets Rob off my back! (See comment on my previous posting…)

July 4th, 2009 | posted by Brother Guy Consolmagno in Daily life

Experimental Astrophysics

When most of us think of scientists, we have visions of men in white coats working in laboratories full of shining tubes and pumps going pockita-pockita. Clearly, that is not what it is like to be an astronomer these days. For one thing, about half the graduate students in Planetary Sciences are now women, not men. What’s more, nobody I know owns a white coat. And it’s hard to do “experiments” on stars or planets; for one thing, they are a little too big to fit into our labs.

And yet, here I am in a lab at Boston College this week. Right behind me is a pump going pockita-pockita. I am setting up to do experiments on materials that may have a lot to do with our understanding of stars and planets.

I am working with Cy Opeil, another Jesuit scientist (like myself) whose lab here at BC measures the physical properties of all sorts of exotic materials. I’ve brought along some exotic materials of my own: not strange compounds created in a lab, the sort of thing he normally measures, but tiny bits of meteorite from our collection in Castel Gandolfo.

The hope is that we will be able to derive very accurate measurements of the physical properties of these meteorites. Knowing how they respond to heat — their thermal conductivity, heat capacity, and thermal inertia — will not only let us calculate more accurately models for their heating and melting. But it turns out that the very motions of asteroids can be affected by the way they respond to sunlight.

About a hundred years ago, a Russian scientist named Yarkovsky realized that a spinning asteroid, which obviously will be hotter on the sunlit side than on the side facing away from the sun, will actually have its “afternoon” side slightly warmer than its “morning” side since its spin will carry the warmer part of the asteroid away from the exact point directly under the Sun. But as an asteroid absorbs sunlight and heats up, it must also radiate that heat away as infrared light (thus balancing the heat coming in with the heat going out, and so maintaining an even temperature). Since the afternoon side is hotter, it emits more energy than the morning side; and this slight imbalance in energy can actually perturb the orbit of the asteroid.

But that depends on how much the heat actually gets carried about by the material in the asteroid: its thermal inertia. If the inertia is high, then the heat can be carried quite a ways and the effect is very strong. Lots of different things can affect the thermal inertia: the presence of dust vs solid rock, the amount of metal vs rock, and so forth. Our measurements in this lab, we hope, will let us put some limits on the thermal inertia of the different materials that make up the asteroid, to help sort out some of these differences.

The Yarkovsky effect has an odd history. Yarkovsky himself apparently published his insight in a pamphlet around 1900, but I don’t know anyone who’s actually seen that pamphlet. The Estonian/Irish astronomer Ernst Öpik recalled reading this pamphlet many years later, and gave him credit for the idea around 1950. When I was a grad student at MIT in the 1970s, a fellow student named Charlie Peterson revisited the idea and worked it out in some detail, but he then left the field and the idea lay fallow for another twenty years. Finally it was revived by a number of scientists starting around 1990 (notably David Rubincam) and it is now well established as an important force in controlling the position and spin of asteroids… and the way they can move pieces into orbits that eventually hit the Earth as meteorites.

A lesson from that: it’s not enough to have a great idea; you have to “campaign” it, keep telling people about it, until the message gets through that you have come up with something important. (Only, sometimes, the opposite message gets back to you… that the idea wasn’t so great, after all, and it is time to look somewhere else!)

With luck, my work in the lab this week will give me something new to “campaign” at meetings of meteorite scientists and planetary astronomers this fall.

May 4th, 2009 | posted by Brother Guy Consolmagno in Daily life, Science explanation

Traveller Astronomy

After my Rory Gallagher post, I received a letter from one of the folks who met me at the Rory Gallagher Music Library. Patsy works with the Irish Traveller community and gave me a wonderful Peace Pin, symbol of a mediation and peace project among this fascinating but often contentious community. To quote her letter:

“I am the (now infamous!) “grey-haired lady who passed you my phone to speak with Eric.  Please note - only the roots are grey - the rest is a wonderful Irish red!

“Deirdre from the Irish Astronomy Association spoke with me after I had given you the Traveller Peace Pin, as she was working with Traveller children for the first time the following Thursday.  I advised her of some of the things in Traveller culture — such as their use of stars and planets years ago when travelling to guide them.  Some of the children came up to her after the talk and were glowing, saying they are Travellers and were so excited at the idea of their grandparents’ knowledge, which they did not know before.  Budding astronomers there, hopefully; as opposed to Astrologers/Fortune Tellers which has been the norm up to now!”

All of this is to remind us of the themes of the IYA. The sky is for everyone, and all our cultures have things to contribute, and things to learn, about our place in the cosmos.

April 22nd, 2009 | posted by Brother Guy Consolmagno in Uncategorized