It's set to revolutionise the way we view the Earth from space. Two special cameras, designed and built by scientists in South Oxfordshire, have blasted off to the International Space Station, ready to reveal video and images of our planet, never seen before.
Cary Johnston took a trip to the final frontier.
More top news
Special bus timetables will apply over the Christmas holiday in the Reading area
House prices in the south-east are expected to rise by 5% in 2015, fuelled by the recent change in Stamp Duty tax rules
Friday morning's forecast for the west of the region