The £1.4 billion, six-tonne spacecraft launched just moments ago on the back of an Ariane 5 rocket from the Kourou spaceport in French Guiana at 13:14 BST (09:14 local time).
MailOnline breaks down everything you need to know about the Juice satellite, which will lift off from Europe s Spaceport in French Guiana at 13:15 BST today.
The Juice satellite had been undergoing final preparations at the Kourou spaceport in French Guiana and was just minutes away from launching when operations were halted.