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.
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.
Researchers found that habitable alien planets could exist closer to their stars than was previously realized. See how habitable zones work in this SPACE.com infographic.
China's Chang'e-3 moon lander carries a six-wheeled rover vehicle on its back. See how Chang'e 3 and the Yutu ('Jade Rabbit') rover work in this SPACE.com infographic.
Sunlike stars eventually become a compact body called a white dwarf, destroying its planets in the process.
An engineer suggests building a roof over a small planet so that Earthlike conditions could be maintained.
High-speed debris from satellite explosions could cause a catastrophic chain reaction, as seen in the movie "Gravity."
A large enough sail would provide thrust from the pressure of sunlight and, perhaps, laser light beamed from afar, allowing a probe to cover vast distances with no need for fuel.