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 . Volcanic Ash Detector Boosts Air Safety . A forgotten form of air transport is due for a revival . Astronomers describe search for habitable planets beyond solar system as new observatories detect molecules of life .