Zachary Quinto explores everything from aliens to Atlantis in the new series.
A rover found building blocks for life on Mars, NASA announced this week, but our fascination with alien life on the red planet began long ago.
Although he was not alive to see it happen, getting an American to the moon was John F. Kennedy's ultimate dream.
Little known facts about the astronomical life of author, cosmologist and physicist Stephen Hawking.
The puppeteer inside the yellow suit was in talks to go to space.
The Challenger launched too early—in part, because Reagan wanted to give a speech about it.
Scientists say Ross 128 b is a “temperate” planet.
For the past 60 years, humans have been leaving their junk in space.
Solar eclipses have been fascinating—and often terrifying—humans throughout the course of history.
Astronomers have detected gravitational waves for the third time in less than two years, after two black holes merged to create a single massive void weighing 49 times as much as the sun.