More than 80% of the world's population lives under light-polluted skies, a study suggests.

An Australian telescope used to broadcast live vision of man's first steps on the moon in 1969 finds hundreds of new galaxies hidden behind the Milky Way by using an innovative receiver that measures radio waves.

New research suggests that ancient, tightly packed clumps of stars found at the fringe of the Milky Way are a good bet in the search for extra terrestrial intelligence (Seti).