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Watch cosmonauts’ spacewalk today

NASA TV will broadcast live coverage of a 5.5-hour spacewalk by two Russian cosmonauts aboard ISS beginning at 7:30 a.m. ET (1230 UTC) Wednesday.

Eleanor Imster

February 3, 2016

Saturn ring density is an illusion

The most opaque parts of Saturn's rings - the parts that look most dense - don't always contain more material. Another great Saturn mystery!

Deborah Byrd

Eleanor Imster

February 3, 2016

What are the odds aliens exist?

The star KIC 8462852 continues to display strange behavior, baffling astronomers and prompting speculation - and these musings - about advanced aliens.

Brian Koberlein

February 3, 2016

Monster gas cloud boomerangs back to us

Astronomers say the Smith Cloud will plow into the Milky Way in about 30 million years and ignite a spectacular burst of star formation.

Eleanor Imster

February 2, 2016

Cassini’s plunge through Saturn’s rings

Cassini spacecraft prepares to plunge between Saturn's rings and the planet. Plus ... learn to see Saturn. Mars Curiosity rover's newest self-portrait. And more.

Deborah Byrd

February 1, 2016

Take a colorful flight over dwarf planet Ceres

A new animation shows a simulated flight over the surface of dwarf planet Ceres, based on images from NASA's Dawn spacecraft.

Eleanor Imster

February 1, 2016

Fungi survive Martian conditions on ISS

Antarctic fungi survive Martian conditions after being strapped on the outside of the International Space Station for 18 months.

Eleanor Imster

February 1, 2016

Mars will be awesome in 2016

All the news you can fit into outer space LIVE on Slooh.com Mondays and Thursdays at 10:30 a.m. ET (1530 UTC). Or watch right here!

Deborah Byrd

January 28, 2016

Dark matter linked to galaxy clusters’ internal structure

It's the first definitive detection of a property other than mass that's been linked to the invisible dark matter making up 27 percent of our universe.

Deborah Byrd

January 27, 2016