China’s Heavenly Palace blasts off

China successfully launched the first module of its future permanent space station - Tiangong, or China's Heavenly Palace - on September 29, 2011.

New ESA images reveal inner workings of galaxies

Newly released ESA images of Holmberg II and Markarian 509 reveal these galaxies' inner workings. Both have stories unlike that of our home galaxy, the Milky Way.

Mercury: Seven things you didn’t know

Far from being dead, the exosphere of Mercury is dynamic and continually renewing. This gives astronomers clues about the planet's surface and environment.

Solar wind sandblasts Mercury

Solar wind sandblasts Mercury because its weak magnetic field provides little protection from the fierce solar wind, a squall of charged particles from the sun.

Strong to severe geomagnetic storm in progress. Aurora alert!

A geomagnetic storm is in progress. If it's nighttime, and you're at a high latitude, go outside and look for auroras! And quit worrying, you. Just enjoy.

UARS satellite reenters atmosphere over Pacific Ocean

UARS penetrated the atmosphere over the Pacific. No debris has been found. There are no reports of injury or property damage. Hoax videos are circulating.

The growing problem of space debris

The September 24, 2011 uncontrolled reentry of NASA's UARS satellite places a spotlight the problem of debris in orbit around Earth.

International Space Station has three new crew

All of launch dates are tentative, but are a welcome step after concerns that launches would cease due to an unmanned Soyuz crash over Siberia on August 24.

New planets may have been found by citizen scientist web users

Looking at data from the Kepler mission, web users participating in the Planet Hunters science project may have found two new planets.

Cassini captures five of Saturn’s moons

Five of Saturn's moons appear in one image taken by the Cassini spacecraft in 2011.