A new paper uses data about the structure of the entire universe to measure the mass of one of its smallest, hardest-to-study components.
A Japanese company that aims to help humanity settle the moon has adjusted the timeline of its first two missions.
Astronauts may one day orbit the moon, live on the lunar surface or travel to Mars in a multifloor, inflatable habitat, should Sierra Nevada's Gateway concept be adopted by NASA.
Earth's dazzling biodiversity may not be so remarkable in the cosmic scheme of things, a new study suggests.
A highly anticipated NASA mission to Jupiter's possibly life-supporting moon Europa remains on track for a mid-2020s launch.
The drama of a total solar eclipse has astonished countless astronomers and amateurs, but few have channeled that astonishment as beautifully as artist Carol Prusa.