Steam engines in space . New clocks to keep time for Galileo satellite navigation system . Deepest X-rays ever reveal universe teeming with black holes . APL Advances Propulsion Technology For Hypersonic Missile Applications . Microbes flying across the Galaxy aboard meteorites .
Astronomers find missing type of quasar .
Universe weighed and 'found wanting' . Forests a blaze of colour from space . Astronomers find missing type of quasa . Scientists Find Evidence For Wet, Slushy Gannymede, Jupiter's Largest Moon . Rare meteorites rekindle controversy over birth of the solar system .