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Astronauts continue work to install solar panels outside International Space Station

Click to play video: 'Spacewalking astronauts install solar panels outside ISS' Spacewalking astronauts install solar panels outside ISS
WATCH: Spacewalking astronauts install solar panels outside ISS – Jun 20, 2021

Astronauts ventured out on their second spacewalk in less than a week Sunday to install powerful new solar panels outside the International Space Station.

France’s Thomas Pesquet and NASA‘s Shane Kimbrough picked up where they left off Wednesday, when spacesuit and other problems prevented them from unrolling the first in a series of high-tech solar panels. Kimbrough wore a different suit to avoid the trouble he encountered last time.

“Remember: You are butterflies with biceps today,” astronaut Megan McArthur radioed from inside.

Read more: First crew of new Chinese space station express confidence ahead of Thursday launch

The spacewalkers managed to bolt down the first solar wing last week, but had to delay making the electrical connections and unfurling the panel to its full 63 feet (19 meters) in length. That topped Sunday’s to-do list.

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These new solar wings are designed to roll out like a red carpet, unlike the station’s old ones that unfolded like an accordion. They will give the aging station a much needed electrical boost, as demand for experiments and space tourists grows.

NASA originally allotted two spacewalks for the job _ one for each solar panel being installed. But managers added a third spacewalk, given all the earlier problems. Pesquet and Kimbrough will go back out Friday to complete work on the second panel delivered by Space X earlier this month.

Click to play video: 'SpaceX returns 4 astronauts to Earth from International Space Station' SpaceX returns 4 astronauts to Earth from International Space Station
SpaceX returns 4 astronauts to Earth from International Space Station – May 2, 2021

This first pair will augment the space station’s oldest solar wings, which are degrading after 20 years of continuous operation.

SpaceX will deliver two more pairs over the next year.

Although smaller than the originals, the new solar panels can generate considerably more power. The space station needs this reenergizing if NASA hopes to keep the space station running the rest of this decade, with private guests paying millions of dollars to come aboard.

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Read more: SpaceX to launch first all-civilian flight into orbit by end of 2021

A Russian film crew is scheduled to launch to the orbiting outpost this fall from Kazakhstan, followed by a string of rich businessmen. SpaceX is providing the rides from Cape Canaveral.

On Wednesday, the display control panel on Kimbrough’s suit conked out and he had to return to the air lock to reset it. Then his cooling system registered a momentary pressure spike. Engineers are still evaluating what went wrong.

“Space is hard,” Kimbrough tweeted.

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