NASA astronaut to set record for longest spaceflight by a woman

NASA astronaut Christina Koch is going to have her mission on the International Space Station (ISS) extended to nearly 11 months, which would set a record for the longest spaceflight by a woman, the US space agency said Wednesday.

Koch, 40, arrived on the ISS on March 14 with two other crew members -- an American and a Russian -- for what was initially planned to be a six-month mission.

The two other astronauts will return to Earth on October 3 but Koch's stay would be extended until February 2020, which would beat the record held by another female US astronaut, Peggy Whitson, who spent 288 days aboard the ISS in 2016-17, NASA said.

"It feels awesome," Koch said when told her mission was being prolonged. "I have known that this was a possibility for a long time and it's truly a dream come true."

Jennifer Fogarty, chief scientist of NASA's Human Research Program, said Koch's extended mission would provide additional data about the effects of long-duration spaceflight on the human body and "support future missions to the Moon and Mars."

The record for an extended spaceflight by an American is held by US astronaut Scott Kelly, who spent 340 days aboard the ISS in 2015-16 with Russian Mikhail Kornienko.

The longest ever spaceflight was by Russia's Valery Polyakov, who spent 14 months aboard the Mir space station in 1994-95.

The current team aboard the ISS is made up of three Americans -- Koch, Anne McClain and Nick Hague -- two Russians -- Oleg Kononenko and Alexey Ovchinin -- and a Canadian, David Saint-Jacques.

Between June and September, several astronauts will return to Earth and be replaced by others, including an Italian, Luca Parmitano, and the first ever astronaut from the United Arab Emirates, Hazzaa Ali Almansoori, who will spend about a week in space.

Astronauts are currently flown to and from the ISS using Russia's Soyuz spacecraft. US manufacturers SpaceX and Boeing are developing their own transports and those are scheduled to be ready by the end of the year.

The ISS -- a rare area of cooperation between Moscow and Washington -- has been orbiting the Earth since 1998.

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