More About Space
Radio signals from alien auroras may help expand the search for new planets outside the solar system, astronomers suggest.
It may be just a star, but the sun is the center of our world. It holds the solar system together; pours life-giving light, heat, and energy on Earth; and generates space weather.
The most popular theory of our universe's origin centers on a cosmic cataclysm unmatched in all of history—the big bang.
Humans have studied nebulae for centuries. But space-based and infrared telescopes that can cut through the dust are casting these cosmic cloud formations in a whole new light.
Explore space, with its mysterious galaxies and black holes, and learn more about where we have been and where we're going in this final frontier.
'Live From Space' March 14
As California's drought endangers Chinook salmon, fisheries officials release 600,000 baby salmon into the Sacramento River, triple the usual number, in hopes that many return to spawn. Video.