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Astronauts arrive at space station aboard SpaceX Endeavour

Astronauts arrive at space station aboard SpaceX Endeavour

A four-astronaut team arrived at the International Space Station on Saturday aboard the SpaceX Crew Dragon capsule Endeavour, Nasa said, after becoming the first crew ever to be propelled into orbit by a rocket booster recycled from a previous space flight.

The Endeavour capsule, also making its second flight, was launched into space on Friday atop a SpaceX Falcon 9 rocket from Nasa's Kennedy Space Center in Florida. SpaceX is Elon Musk's commercial rocket company.

The Endeavour docked to the space station complex while the spacecraft were flying 425km above the Indian Ocean, Nasa said in an update.

On board were two Nasa astronauts — mission commander Shane Kimbrough, 53, and pilot Megan McArthur, 49 — along with Japanese astronaut Akihiko Hoshide, 52, and fellow mission specialist Thomas Pesquet, 43, a French engineer from the European Space Agency.

The mission marks the second “operational” space station team launched by Nasa aboard a Crew Dragon capsule since human space flights resumed from American soil last year, after a nine-year hiatus at the end of the US space shuttle programme in 2011.

It is also the third crewed flight launched into orbit in 11 months under Nasa's fledgling public-private partnership with SpaceX, the rocket company founded in 2002 by Musk, who is also CEO of electric car maker Tesla Inc.

The mission's Falcon 9 rocket blasted off with the same first-stage booster that lofted a crew into orbit five months ago, marking the first time a previously flown booster has ever been re-used in a crewed launch.

Reusable booster vehicles, designed to fly themselves back to Earth and land safely rather than fall into the sea after launch, are at the heart of a reusable rocket strategy that SpaceX helped pioneer to make space flight more economical.