Celebrating 100,000 orbits for ISS

Facts, links and photos here, with a word about ISS's history and purpose.

Watch a comet plunge toward the sun

In early August, SOHO spacecraft saw this bright sungrazing comet, plunging toward the sun at nearly 1.3 million miles (2.09 million km) per hour.

Once a day, Io’s atmosphere collapses

Jupiter's moon Io has active volcanos spewing gases into its thin atmosphere. As Io moves in and out of Jupiter's shadow, its atmosphere collapses and then repairs itself.

Star lashes companion with mystery ray

Astronomers thought the star AR Scorpii was a lone variable star. Now they realize it's a dwarf star bombarding its companion with relativistic electrons.

Why no young stars at Milky Way center?

An international team of astronomers finds that that there's a large region around the center of our home galaxy that's devoid of young stars.

Emirates Mars Mission to launch in 2020

The Emirates Mars Mission - which carries the name Hope - will become the first-ever mission to the Red Planet by any Arab country.

Trio of solar flares

The sun emitted 3 mid-level solar flares on July 22-23, 2016. This is what NASA's Solar Dynamics Observatory saw.

Where are Ceres’ large craters?

There's a curious lack of big craters on the dwarf planet Ceres, largest body in the asteroid belt between Mars and Jupiter. Why?

New China telescope to search for aliens

A 1,600-foot (500-meter) dish called FAST - in southwest China - is now the world's largest radio telescope. It's expected to be fully operational in September.

Cloud study reveals Venus’ surface

Scientists had suspected that mountains on Venus affected weather patterns seen rippling across Venus' cloudtops. A new study provides evidence of this connection.

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