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NASA capsule reaches Moon in last big step before lunar orbit

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NASA capsule reaches Moon in last big step before lunar orbit​

Posted 5h ago5 hours ago
A screengrab shows the moon and a NASA capsule.

NASA's Orion capsule nears the Moon on Monday. Earth can also be seen in the image.(NASA via AP)
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NASA's Orion capsule reached the Moon on Monday, whipping around the far side and buzzing the lunar surface on its way to a record-breaking orbit with test dummies sitting in for astronauts.

Key points:​

  • The close approach occurred on the far side of the Moon
  • The capsule's cameras sent back a picture of Earth — a tiny blue orb
  • It will spend close to a week in lunar orbit before heading home

It's the first time a capsule has visited the Moon since NASA's Apollo program 50 years ago, and represents a huge milestone in the $US4.1 billion test flight that began last Wednesday.
The close approach of 130 kilometres occurred as the crew capsule and its three wired-up dummies were on the far side of the Moon.
Because of a half-hour communication blackout, flight controllers in Houston did not know if the critical engine firing went well until the capsule emerged from behind the Moon, 370,000km from Earth.
The capsule's cameras sent back a picture of the world — a tiny blue orb surrounded by black.
"Our pale blue dot and its 8 billion human inhabitants now coming into view," Mission Control commentator Sandra Jones said.
A small blue spec among a black background.

An image of Earth taken from NASA's Orion spacecraft while behind the Moon on Monday.(NASA via AP)
The capsule accelerated well beyond 8,000 kph as it regained radio contact, NASA said.
Less than an hour later, Orion soared above Tranquility Base, where Neil Armstrong and Buzz Aldrin landed on July 20, 1969.
"This is one of those days that you've been thinking about and talking about for a long, long time," flight director Zeb Scoville said.
Earlier in the morning, the Moon loomed ever larger in the video beamed back, as the capsule closed the final few thousand miles since blasting off from Florida's Kennedy Space Center, atop the most powerful rocket ever built by NASA.
Orion needed to slingshot around the Moon to pick up enough speed to enter the sweeping, lopsided lunar orbit.
Flight controllers evaluated the data pouring back, to determine if the engine firing went as planned.

Another firing will place the capsule in that elongated orbit on Friday.
This coming weekend, Orion will shatter NASA's distance record for a spacecraft designed for astronauts — nearly 400,000km from Earth, set by Apollo 13 in 1970.
And it will keep going, reaching a maximum distance from Earth next Monday at nearly 433,000km.
The capsule will spend close to a week in lunar orbit, before heading home.
A Pacific splashdown is planned for December 11.
Orion has no lunar lander; a touchdown won't come until NASA astronauts attempt a lunar landing in 2025 with SpaceX's Starship.
Before then, astronauts will strap into Orion for a ride around the Moon as early as 2024.
NASA managers were delighted with the progress of the mission.
The Space Launch System rocket performed exceedingly well in its debut, they told reporters late last week.
The 98m rocket caused more damage than expected, however, at the Kennedy Space Center launch pad.
The force from the 4 million kilograms of lift-off thrust was so great that it tore off the blast doors of the elevator.
AP
Posted 5h ago
 
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Huge Artemis 1 moon rocket blew the doors off its launch tower's elevators (video)​

By Elizabeth Howell
published about 13 hours ago
'The environment ... is not the friendliest when when you have the world's most powerful rocket lifting off.'
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NASA's powerful new moon rocket damaged its launch pad and blew away elevator doors in the launch tower during its inaugural liftoff last week.

Artemis 1, the first flight of the Artemis program, launched early Wednesday morning (Nov. 16). Nearly 9 million pounds (4 million kg) of thrust took the Space Launch System (SLS) rocket into the final frontier, where it successfully sent an uncrewed Orion spacecraft toward the moon.
While the mission is otherwise nominal, the damage left behind is something NASA is closely looking at to prepare for future missions of the Artemis program, including the next planned one with humans on board: Artemis 2, set to fly around the moon no earlier than 2024.
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"The damage that we did see pertains to really, just a couple of areas," emphasized NASA's Mike Sarafin, Artemis mission manager, in a press conference with reporters on Monday (Nov. 21).
"It just goes to show," he added, "that the environment ... is not the friendliest when you have the world's most powerful rocket lifting off."

In photos: Amazing views of NASA's Artemis 1 moon rocket debut
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Like the space shuttle before it, Artemis 1's launch used a water suppression system to reduce the amount of damage to the launching deck, which worked as expected. Nevertheless, paint was peeled off the deck of Artemis 1's launch tower due to the sheer force of the liftoff, Sarafin said.
The elevators for servicing the launch tower fared less well, with photos showing crooked framing around at least one of the two lifts after the doors were ripped away by the shock wave generated by the SLS.
"The elevator system is not functioning right now," Sarafin explained. "The pressure basically blew the doors off our elevators ... right now, the elevators are inoperable, and we need to get those back into service."

two elevator doors side by side with one showing buckling in the frame at right



An image of the elevators at Launch Pad 39B, whose doors were blown off by the launch of Artemis 1. (Image credit: NASA)
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Minor damage was induced to the pneumatic lines associated with gaseous nitrogen and gaseous helium to service the massive SLS tanks, which tricked oxygen sensors on the pad into reading low oxygen levels amid the leaking gas, NASA officials added.
Managers also found two small flight items near the pad that shouldn't have been there: "throat plug material" expelled from the rocket during liftoff (which happens from time to time with rocket launches), and one piece of RTV (insulating caulking) from the base of the Orion capsule.
It is unclear, however, whether the RTV flew off during launch or came off during Tropical Storm Nicole, which ripped off a strip of caulking prior to the launch; mission managers had determined before launch that the RTV issue would not be a risk.
The damage was minor enough that Sarafin characterized SLS as "a very clean system," adding that the rocket exceeded its performance targets and that the team will make some changes for Artemis 2.
"This is about being as safe as we can, given the hostile environment that we're flying into for our astronauts," he said of the mission planning at large, including the launch phase. "We take this very seriously. Flight safety for our astronauts is paramount."
Elizabeth Howell is the co-author of "Why Am I Taller(opens in new tab)?" (ECW Press, 2022; with Canadian astronaut Dave Williams), a book about space medicine. Follow her on Twitter @howellspace(opens in new tab). Follow us on Twitter @Spacedotcom(opens in new tab) or Facebook(opens in new tab).
Join our Space Forums to keep talking space on the latest missions, night sky and more! And if you have a news tip, correction or comment, let us know at: community@space.com.

Elizabeth Howell

Elizabeth Howell
 
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