Hubble celebrates its 25th anniversary this month. However, the Nasa space telescope that has transformed our view of the Universe was launched with a major defect. Richard Hollingham talks to the man who had to don his spacesuit and make it work.
The supermassive black hole is 40 million times as massive as the sun and powers a quasar that existed 700 million years after the Big Bang.
The asteroid zoomed by Earth at a perfectly safe distance of around 1.8 million miles (2.9 kilometers).
Images show surprise changes to the spacecraft as it interacted with the atmosphere.
