The first-ever UK orbital space launch set off from Cornwall on Monday evening.
Hundreds of people watching the launch cheered as the modified Boeing 747 took off from Newquay airport shortly after 10pm.
Around an hour into the flight the LauncherOne rocket will be released at 35,000ft over the Atlantic Ocean to the south of Ireland.
The plane will then return to the spaceport while the rocket will ignite its engine and take multiple small satellites into orbit.
The Virgin Orbit launch is the first launch of orbital satellites into space from western Europe.
The mission marks a major milestone for UK spaceport efforts. In the past, satellites produced in the UK have been sent to foreign facilities to make their journey into space.
Virgin Orbit, part-owned by billionaire Richard Branson, had previously said the plane was expected to take off as late as 11pm.
“Assuming that everything continues to look good we’re currently tracking well for launch," a Virgin Orbit spokeswoman said beforehand.
Virgin Orbit's LauncherOne rocket at Spaceport Cornwall