Enceladus has an extensive water ocean under its icy crust, feeding water jets that emerge from near the south pole.
The moon is Earth's nearest neighbor, but its origins date back to a violent birth billions of years ago. See how the moon was made in this Space.com infographic.
In the distant inner Oort Cloud, a largely unexplored region that likely hosts millions of icy objects, astronomers are finding surprises and possibly a ninth solar system planet.
Inflation is the mysterious force that blew up the scale of the infant universe from sub-microscopic to gargantuan in a fraction of a second.
Several of the asteroids that have been spotted passing with the orbits of the moon and even Earth's communications satellites.
Space tourist Dennis Tito's daring proposal to send a married couple on a 501-day space flight around the planet Mars and back.
The GPM Core Observatory scans the weather with microwaves and two bands of radar. See how the Global Precipitation Measurement Satellite by NASA and JAXA will map rain and snow like never before.
Most astronomers believe the universe began 13.8 billion years ago in a sudden explosion called the Big Bang. Other theorists have invented alternatives and extensions to this theory.
Not quite massive enough to ignite nuclear fusion, brown dwarfs may be as common as regular stars in the universe. Here's a look at how brown dwarfs may work in a SPACE.com infographic.
For 10 years the robots have roved across Mars, making exciting discoveries about water in the planet's past.
The two-part Rosetta spacecraft is designed to orbit and land on a comet. See how it will orbit and land on the Comet 67P/Churyumov-Gerasimenko in November 2014.
The strange magnetic asteroid could be all that remains of what was once a protoplanet in the early solar system.
By surrounding their star with swarms of energy-collecting satellites, advanced civilizations could create Dyson spheres.
By keeping tabs on 1 billion stars over its five-year mission, Gaia aims to create the first accurate 3D map of the Milky Way Galaxy.