Pluto flyby: The thrilling moment

After nine-and-a-half years in space, this was the moment Nasa's spacecraft New Horizons soared past Pluto at 31,000mph (50,000km/h).

At least, that's what the team hopes happened.

Confirmation of the flyby won't be received until about 02:00 BST on Wednesday.

Until then, the craft will be too busy taking pictures and measurements - and it also takes more than four hours for the signals to beam back to Earth.

Rebecca Morelle reports from the operations centre at Johns Hopkins University in Baltimore, US.