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.
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Volunteers risk their lives to vaccinate children in Islamic State-controlled territory in Syria. Video.