Greenbelt, US

HUBBLE, the first telescope to revolutionise modern astronomy and change our view of the universe by offering glimpses of distant galaxies, marks its 25th year in space this week.

"Hubble absolutely has changed the way humans look at the universe and our place in it," said astronomer Jennifer Wiseman, one of the telescope's senior scientists at National Aeronautics and Space Administration's (Nasa) Goddard Space Flight Center in Greenbelt, Maryland.