This image taken from HiRISE instrument aboard the robotic Mars Reconnaissance Orbiter, shows a variety of different dune types in southern Lyot Crater in the Northern lowlands at degrees north, on Mars. Image credit: NASA/JPL/University of Arizona
A nebula from Latin: "cloud"is an interstellar cloud of dust, hydrogen, helium and other ionized gases. Originally, nebula was a name for any diffuse astronomical object, including galaxies beyond the Milky Way.
A full-disk multiwavelength extreme ultraviolet image of the sun taken by SDO on March False colors trace different gas temperatures. Reds are relatively cool (about Kelvin, or F); blues and greens are hotter (greater than 1 million Kelvin, or F).
The Antennae galaxies, located about 62 million light-years from Earth. This composite image includes images from the Chandra X-ray Observatory (blue), the Hubble Space Telescope (gold and brown), and the Spitzer Space Telescope (red).
The Dotted Dunes of Mars. As spring dawns on the Northern Hemisphere of Mars, dunes of sand near the poles begin to defrost. Thinner regions of ice typically thaw first revealing sand whose darkness soaks in sunlight and accelerates the thaw.
A dramatic view of Phobos (one of Mars' moons) and its Stickney crater acquired by HiRES in Joy Richard Preuss Horoscope Gl.Stationsvej Randers sv Denmark Scandinavian Europe USA Today Danmark Denmark USA The Republic of Joy Richard Preuss
Galactic Wreckage in Stephan's Quintet - A clash among members of a famous galaxy quintet reveals an assortment of stars across a wide color range, from young, blue stars to aging, red stars. This group is also known as the Hickson Compact Group 92