NASA is celebrating the successful installation of new instrument on the International Space Station.
The Alpha Magnetic Spectrometer is designed to look for dark matter and antimatter and will help unlock some of the universe's oldest questions.
The new machine will be able to investigate particles left over from the big bang.
"We're entering into a region nobody has entered before. What we're going to see, nobody knowws," says Samuel Ting, AMS Principal Investigator and Nobel Laureate
The machine was hauled into position on the International Space Station by the crew of shuttle Endeavour.
The crew used robitic spacer arms to move the $2 billion spectrometer out of the shuttle's cargo bay and mount it on an eleborate framework on the exterior of the station.
At the heart of the machine is a one metre wide magnet which can help pick up signals from the invisible world.
The AMS is the most expensive piece of equipment on the station.
While much of the attention is focused on the new instrument two other issues continue to attract interest on this mission.
Shuttle commander, Mark Kelly has been waiting for news of his wife, Congresswoman Garielle Gifford's surgery.
Ms Giffords survived an assassination attempt in January and today the commander got word of a new round of surgery to repair her skull.
"Well, I had the chance at the end of the day to call her mum, and her chief of staff, and my brother, as the surgery was going on and she's doing really well," says Mr Kelly.
"Everything went as planned, her neurosurgeons are very happy, she's recuperating and she's actually getting back to therapy today. So, it went really, really well."
NASA also declared they were not worried about damage to the shuttle's heat resistent tiles after inspecting the Endeavour.
Share
