Proxima Centauri’s awesome new planet

The newly found planet for Proxima Centauri, our sun's nearest neighbor among the stars, is revealed as the closest possible abode for alien life.

Watch spacewalk live August 19

Two ISS astronauts will perform a spacewalk on Friday. NASA TV's live coverage starts at 6:30 a.m. EDT (10:30 UTC) and lasts about eight hours.

Physicists confirm a possible 5th force

“If true, it’s revolutionary,” said Jonathan Feng, professor of physics and astronomy at University of California, Irvine and lead author of the new study.

Astronomers aim Kepler at the Pleiades

The famous planet-hunting Kepler spacecraft peered toward the beautiful Pleiades star cluster and measured the spin rates of hundreds of Pleiades stars.

Tabby’s Star: More weirdness

Some astronomers think this star may have an alien megastructure - an energy-gathering Dyson sphere - around it. Here's a glimpse of the controversy.

Saturn’s moon Titan has flooded canyons

They're steep-sided canyons with liquid in them, but the liquid isn't water. Instead, it's liquid hydrocarbons.

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.

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