lfenton

May 13, 2012

One perfect barchan on Mars

A piece of Mars: In nature most dunes pile on one another or strongly influence each other. But occasionally, like a perfect flower or crystal, you find a perfectly shaped dune. Here is a crescentic dune, called a “barchan”, formed […]
May 10, 2012

So beautiful

A piece of Mars: The dunes can be so beautiful on Mars. What a lovely vacation spot this would be, provided you brought a large supply of oxygen, food, and a heat source to keep you warm. (HiRISE ESP_026416_1620)
May 9, 2012

Sand, wind, and dust

A piece of Mars: This is what dunes look like in the deepest part of Mars, where the air is full of bright dust that constantly settles out onto everything. The wind helps to clear off the sand dunes (blue […]
May 8, 2012

Tweed

A piece of Mars: Patterns within patterns (metapatterns?).  These small martian dunes shown an unusual complexity in their crossing lines, indicating that they were formed by winds from several directions (and it is likely that those winds changed over time). […]
May 7, 2012

Wind on high

A piece of Mars: We are looking way up high on Arsia Mons, one of the tallest mountains in the Solar System (its summit is ~19 km high — Mt. Everest tops out at 8.848 km; the location of this […]
May 6, 2012

High summer near the north pole of Mars

A piece of Mars: It’s high summer in the northern hemisphere of Mars. Here, dark dunes near the north pole have finally lost the seasonal ice that blankets them and turns them white for most of the year. For a […]
May 4, 2012

New duties

Today I became the deputy manager of the Planetary Landscapes Facebook page. Looks like it will be fun, and I hope it won’t take up too much time. I do like the idea of sharing all of the beauty of […]
May 3, 2012

Colors and waves

A piece of Mars: Here are some lovely ripples on Mars. In the same field of ripples, there are large wavy white ones and small complex blue ones. Why are there two different types, made distinct by their color, size, […]
May 2, 2012

Mars’ moving dunes

                    A piece of Mars: Today’s image comes courtesy of my postdoc, Simone Silvestro. He’s studying migrating dunes and has made a 3 image movie of a dune moving across the […]