Space

Asteroids less threat to Earth than thought

China launches Tiangong-1 into orbit

Cosmic 'umbilical cord' discovered

China preps Tiangong-1 for launch

UARS satellite fell in south Pacific, says NASA

And the weather on Venus…

More activity likely as solar storm continues

Team images electrical circuit linking Saturn and Enceladus

Did solar system once have fifth giant?

NASA to test laser communications system