Gemma Lavender gets to the bottom of this question for us
Before now, the ripples in space-time had only been detected from black-hole mergers
This is the first three-detector observations made of these waves in the fabric of space-time
The spacecraft has been switched off as planned on the evening of 18 July, ending its successful mission which surpassed all expectations
Brightening further in the pre-dawn sky, will ISON live up to the “Comet of the Century” title? Here’s our guide on what should happen – and how best to see it – if it survives its close encounter with the Sun.