NASA’s new space telescope ‘hunky-dory’ after problems fixed
Jan 3, 2022, 8:52 PM | Updated: Jun 13, 2022, 3:42 pm
In this handout image provided by the U.S. National Aeronatics and Space Administration (NASA), Arianespace's Ariane 5 rocket launches with NASA's James Webb Space Telescope onboard, from the ELA-3 Launch Zone of Europes Spaceport at the Guiana Space Centre at Europes Spaceport, at the Guiana Space Center on December 25, 2021, in Kourou, French Guiana. The James Webb Space Telescope (sometimes called JWST or Webb) is a large infrared telescope with a 21.3 foot (6.5 meter) primary mirror. The observatory will study every phase of cosmic history from within our solar system to the most distant observable galaxies in the early universe. (Photo by Bill Ingalls/NASA via Getty Images)
(Photo by Bill Ingalls/NASA via Getty Images)
CAPE CANAVERAL, Fla. (AP) — NASA’s new space telescope is on the verge of completing the riskiest part of its mission — unfolding and tightening a huge sunshade — after ground controllers fixed a pair of problems, officials said Monday.
The tennis court-size sunshield on the James Webb Space Telescope is now fully open and in the process of being stretched tight. The operation should be complete by Wednesday.
The $10 billion telescope — the largest and most powerful astronomical observatory ever launched — rocketed away Christmas Day from French Guiana. Its sunshield and primary mirror had to be folded to fit into the European Ariane rocket.
The sunshield is vital for keeping Webb’s infrared-sensing instruments at subzero temperatures, as they scan the universe for the first stars and galaxies, and examine the atmospheres of alien worlds for possible signs of life.
Getting the sunshield extended last Friday “was really a huge achievement for us,” said project manager Bill Ochs. All 107 release pins opened properly.
But there have been a few obstacles.
Flight controllers in Maryland had to reset Webb’s solar panel to draw more power. The observatory — considered the successor to the aging Hubble Space Telescope — was never in any danger, with a constant power flow, said Amy Lo, a lead engineer for the telescope’s prime contractor, Northrop Grumman.
They also repointed the telescope to limit sunlight on six overheating motors. The motors cooled enough to begin securing the sunshield, a three-day process that can be halted if the problem crops up again, officials said.
“Everything is hunky-dory and doing well now,” Lo said.
Ochs expects the tightening of the sunshield to be drama-free.
“The best thing for operations is boring, and that’s what we anticipate over the next three days, is to be boring,” he told reporters in a teleconference.
If that holds true, the telescope’s gold-plated mirror — more than 21 feet (6.5 meters) across — could unfold as soon as this weekend.
Webb should reach its destination 1 million miles (1.6 million kilometers) away by the end of January. As of Monday, the telescope was more than halfway there. The infrared telescope should begin observing the cosmos by the end of June, ultimately unveiling the first stars and galaxies formed in the universe 13.7 billion years ago. That’s a mere 100 million years after the universe-creating Big Bang.
Launched in 1990, Hubble, which sees primarily visible light, has peered as far back as 13.4 billion years ago. Astronomers hope to close the gap with Webb, which is 100 times more powerful.
In another bit of good news Monday, officials said they expect Webb to last well beyond the originally anticipated 10 years based on its fuel efficiency.
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