It was one of the most audacious space missions ever. How did it feel to be part of the Rosetta team as it touched down on a comet? As the spacecraft nears its closest approach to the Sun, Richard Hollingham recounts the drama, the disappointments and the jubilation of a 30-year quest.
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.