Dune on a hill
Published 9/2/2020 in Lori Fenton's Blog Author lfenton
Sept. 2, 2020 Dunes don't usually form on hills. They're made of sand, which is moved by wind (and water and ice) and tends to linger where it gets stuck. You probably know this intimately if you've spent time at a sandy beach. It's true not only on the scale of the threads of a beach towel and in jeans pockets, but also on a larger scale. Dune fields are made of windblown sand that piles up in valleys, or whatever topographic low it's being blown past. The biggest sand sea on Mars, for example, is found at the bottom of... read more ❯

Observe an Occultation by Asteroid Alikoski from San Francisco Bay Area Saturday evening
Published 3/27/2020 in Franck Marchis Blog Author Franck Marchis
To all citizen astronomers, Are you at home like most of us? Good news, you can contribute to astronomy from your backyard on Saturday just after sunset. If you have an eVscope that's super easy.  The asteroid (1567) Alikoski will occult a V-11.4 star during up to 2.4 second on Saturday March 29 at 8h18pm (in San Francisco, CA), so just at the beginning of the night . Because of its brightness and the duration of the event,  this event is a great opportunity for all of us to learn about Alikoski, a  rare-type carbonaceous asteroid from the outer region of the main-belt.... read more ❯

Dome dunes
Published 2/17/2020 in Lori Fenton's Blog Author lfenton
Feb. 17, 2020 I've been busy but I wanted to squeeze in a quick pretty picture of some Mars dunes. These: These dark hills of windblown sand are on the small side for Mars. The smallest is ~88 m (288 ft) across (for reference the smaller dunes found on Earth are usually 1/4 this size). What's cool about them is the variation in their slip faces: that steep slope that is just crying out for someone to slide down it (or roll down... read more ❯

Occultation by Nyanza on President Day across the US
Published 2/13/2020 in Franck Marchis Blog Author Franck Marchis
Hello, If you have an eVscope and you want to participate to a scientific campaign on Presidents’ Day, this is something that may interest you. The asteroid 1356 Nyanza will occult a V-12.2 star for up to 6 seconds on February 17 at ~8pm PST and 11pm EST. Yes! This occultation will be visible across the US, from Redding, CA to Philadelphia, PA and Chicago, IL. If a large number of eVscope users observe this event, we will be able to derive the size, shape and eventual existence of moons around the asteroid. So don't wait and take your eVscope out if... read more ❯

Get your Unistellar eVscopes and help observe an exoplanet this weekend!
Published 1/11/2020 in Dan's Cosmic Diary Author Dan Peluso
Dear Unistellar eVscope users, Want to be involved in something innovative like participating in the very first Unistellar exoplanet detection campaign? Then charge your eVscope and get ready because we need your help this weekend! My name is Dan Peluso and I am doing my PhD in astrophysics with Franck Marchis (astronomer at the SETI Institute) and as a portion of my research I want to see if it is possible for any astronomy enthusiast around the world to coordinate with planet hunting scientists like us to help contribute to the search for planets around other stars (a.k.a. exoplanets). Exoplanet searches usually... read more ❯

Helping Future NASA Missions: The Case of Orus, Target of the Lucy Mission
Published 10/16/2019 in Franck Marchis Blog Author Franck Marchis
A Unistellar team traveled to Oman in early September to observe the occultation of a 11-mag star by the Trojan asteroid Orus. We succeeded in capturing the event with one of our eVscopes, an achievement in and of itself considering the small and uncertain path of this occultation. This is an important breakthrough because this detection will be used for another occultation by  Orus again, coming up soon in Australia. On the top of that, this positive detection heralds the arrival of a new tool (the eVscope network) for the study of asteroids, centaurs and trans-Neptunian objects by occultations. Lucy is... read more ❯

Baby dunes
Published 4/26/2019 in Lori Fenton's Blog Author lfenton
I saw an article today linked by the International Society for Aeolian Research's Facebook page, on the dangers of dust being lofted in Earth's youngest desert, the Aralkum Desert in Kazakhstan. It's where the Aral Sea used to be, decades ago. Here's the article from Atlas Obscura. It sounds like a difficult place to get to, and an even harder place to study. But, I thought, maybe there was something interesting to see from above. Maybe even new dunes, because rapidly exposed lake beds provide ready sources of sand for building dunes. A flat plain of sand will tend to form... read more ❯

Calling Exogeophysicists to Solve the Mystery of Super-Earths
Published 3/5/2019 in Franck Marchis Blog Author Franck Marchis
There is a mystery in our galaxy, and astronomers around the world are working to solve it. The NASA Kepler mission revealed that planetary systems are common, and that on average, each star has two planets in orbit around it. This is great news for SETI researchers, since it means that there are a lot of worlds out there to explore. Many of them may have liquid water, meaning that there is the possibility that life could exist elsewhere in our galaxy. However, there is something unusual about some recently discovered planetary systems—half of those with a sun-like star have... read more ❯

Unistellar is hiring - Communication and Community Management Internship
Published 2/26/2019 in Franck Marchis Blog Author Franck Marchis
Something unusual for my blog, but why not... Unistellar is hiring a Communication and Community Manager in Marseille, France. If you like astronomy, want to work on the south of France for a high-tech startup and share your love for science, this is a job for you! We are looking for this motivated person to start ASAP. Below the ad: Communication and Community Management Internship Our Company Unistellar is a high-tech start-up based in Marseille, France, and in California. We are developing the eVscope, a unique connected consumer telescope. Our patented light-amplification system will revolutionize astronomy by making its practice as popular as... read more ❯

The martian wind is a geologist
Published 10/18/2018 in Lori Fenton's Blog Author lfenton
Right now, the Fourth Landing Site Workshop for the Mars 2020 rover mission is happening. It's the last one, and in a few hours the scientists attending the workshop will vote on which of four sites they think the rover should land. I love the geology, but mostly I love one little corner of geology: where the rocks meet the atmosphere. I like how studying the rocks can teach us about how the atmosphere, and therefore the climate, has changed over time on Mars. There are signs of windblown things pretty much anywhere you look on Mars, and since none of... read more ❯

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