First light for space telescope

A powerful Nasa space telescope launched in June has unveiled its first results - including an image of the sky viewed through "gamma-ray glasses".

Nasa also revealed a new name; the Gamma-ray Large Area Space Telescope has become the Fermi telescope.

The name honours Enrico Fermi - one of the pioneers of high energy physics.

Fermi will study some of the most extreme phenomena in the cosmos, which liberate massive amounts of energy in the form of gamma-rays.

It will scan the sky for massive cosmic explosions, giant black holes that hurl matter across space, and dense neutron stars with powerful magnetic fields.