The Flaming Star Nebula (IC 405, SH 2-229, or Caldwell 31) is an emission/reflection nebula in the constellation Auriga, surrounding the bluish star AE Aurigae. The nebula is about 5 light-years across.
Nebulosa da Chama
A piece of Mars: An elegantly swirling gully has carved itself into the side of a dune field. These "dune gullies" are unique to the southern midlatitudes, and their formation is not well understood. Regardless of how they form, they do change in successive images, indicating that they are active today. They provide yet more evidence of active geological processes on Mars. (HiRISE PSP_006648_1300)
A piece of Mars: In this image (0.96x0.54 km or 0.6x0.33 mi), it's late winter and the sun is barely above the horizon here near the north pole. The dunes are covered in winter frost, most of which is CO2 ice (also known as dry ice). The dark regions are those facing the sun, where the ice has started to sublimate, revealing the dark sand below. (HiRISE ESP_041433_2650, NASA/JPL/Univ. of Arizona)
Nebulosa Planetária Espiral
A piece of Mars: Is it the latest in patterns for ties, or is it Mars? (Can it be both?) These are some unusually regular dunes on Mars, separated by a bouldered surface. The dunes have interesting pale bands common in this region on Mars, as well as an unending supply of long, parallel ripples. (HiRISE ESP_025108_1370)
A Piece of Mars: A large dune (on the right, bluish) rests on a surface covered in much smaller dunes or ripples (on the left, cream). This is part of my favorite dune field on Mars. Can you spot the little boulders at the foot of the large dune? (ESP_028893_1320)