Why Getting to Mars is Not So Easy
There is a reason Mars has a reputation as a graveyard for spacecraft.
The Weirdest Dwarf Planets Discovered So Far
The solar system is apparently more crowded than we thought: astronomers have discovered a new dwarf planet. Some dwarf planets don't play by the rules.
A New Tool in the Search for Alien Life
China is bringing a huge new radio telescope on-line, and part of its stated purpose will be to search for alien life.
The Mysterious Ocean of Enceladus
Saturn’s moon Enceladus has a secret. For some years, scientists have been convinced that there is a liquid ...
Where Did the Moon Come From?
Despite years of study, it is only since the 1980s that a theory of the moon's origin has coalesced.
Sending Tiny Robots to the Nearest Star
A group of astrophysicists think they have found a way to send a probe to the newest star system, Alpha Centauri.
The Commercialization of Space
Policymakers and scientists have been thinking about the details of the commercialization of space for decades.
Happy Birthday, Hubble Telescope!
This year, the Hubble Telescope celebrates its 26th year in space.