With rubble from an asteroid tucked inside, a NASA spacecraft has fired its engines and begun the long journey back to Earth.
- Scientists expect between 200 and 400 grams of sample to return home
- The spacecraft initially picked up more than 2kgs, but had to let some go
- OSIRIS-REx is expected to land in the Utah desert in 2023
The 2.3 billion kilometre trip home for the robotic prospector, OSIRIS-REx will take two years.
OSIRIS-REx reached asteroid Bennu in 2018 and spent two years flying…