Scientists believe a planet (or more) orbits the triple star system GW Orionis. This would be the first circumtriple planet discovered.

The Landsat program, the longest space-based record of Earth’s surface, helps policy makers make decisions about our resources and environment.

Scientists tracked a daylight fireball to Earth using images from video of the event that occurred over countries near the Adriatic Sea.

Data from the Hubble Space Telescope shows that the Great Red Spot winds have been increasing on Jupiter over the past decade.

Giant slushy hailstones called mushballs explain missing ammonia in the atmospheres of Uranus and Neptune. They carry the gas down far too deep to be detected.

In the battle of satellites versus stars, the motion of constellations of satellites will draw the eye and drown out the quiet background stars.

Mars was once a wet and habitable world, so what happened to change that? According to a new study from Washington University in St. Louis, Mars' small size is likely to blame for why it lost most of its water and atmosphere.

Hear the sounds of space. The videos in this post are what happens when scientists turn astronomical data into sound, via a process called sonification.

NASA scientists say that there were once thousands of volcanic eruptions on Mars. These explosive blasts, in the northern Arabia Terra region, were "super eruptions," the largest and most powerful kind known. The intense activity continued for about 500 million years, about four billion years ago.

The Juno spacecraft observed footprint tails of aurora on Jupiter’s atmosphere. Three of Jupiter’s closest large moons create these auroral tails.