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.
NASA's Lunar Laser Communications Demonstration is a novel test of next-generation communications tech. See how the system works in this SPACE.com infographic.
The Lunar Atmosphere and Dust Environment Explorer will uncover details of the moon's thin atmosphere.