The Tiny Moon Phobos Is Photographed During Its Quick Trip Around Mars
While photographing Mars, NASA’s Hubble Space Telescope captured a cameo appearance of the tiny moon Phobos on its trek around the Red Planet.
Young, Dead, Compact, Disk Galaxy Surprises Astronomers, Offers New Clues to How Modern-Day Elliptical Galaxies Formed
Astronomers combined the power of a “natural lens” in space with the capability of NASA’s Hubble Space Telescope to...
Galaxies Shine with the Brilliance of up to 100 Trillion Suns
Astronomers were fascinated in the 1980s with the discovery of nearby dust-enshrouded galaxies that glowed thousands of times brighter than our Milky Way galaxy in infrared light...
Atmospheres of Two Hot Jupiters: Cloudy and Clear
Astronomers once thought that the family of planets that orbit our sun were typical of what would eventually be found around other stars: a grouping of small rocky planets like Earth huddled...
Most of the dwarf planets now have known moons
Beyond the orbit of Neptune lies a frigid, dark, vast frontier of countless icy bodies left over from the solar system's construction 4.6 billion years ago.
Hubble Celebrates Its Anniversary with a Spectacular Pair of Galaxies
When the Hubble Space Telescope launched aboard the Space Shuttle Discovery on April 24, 1990, astronomers could only dream what they might see.
Best Evidence Yet for Reoccurring Water Vapor Plumes Erupting from Jupiter’s Moon
When Galileo discovered Jupiter's moon Europa in 1610, along with three other satellites whirling around the giant planet, he could have barely imagined it w...