NATIONAL NEWS

NASA’s James Webb Space Telescope reaches final stop, 1 million miles out

Jan 24, 2022, 4:28 PM | Updated: Jun 13, 2022, 3:41 pm

The trajectory of the James Webb space telescope (Steve Sabia / NASA Goddard)...

The trajectory of the James Webb space telescope (Steve Sabia / NASA Goddard)

(Steve Sabia / NASA Goddard)

CAPE CANAVERAL, Fla. (AP) — The world’s biggest, most powerful space telescope arrived at its observation post 1 million miles from Earth on Monday, a month after it lifted off on a quest to behold the dawn of the universe.

On command, the James Webb Space Telescope fired its rocket thrusters for nearly five minutes to go into orbit around the sun at its designated location, and NASA confirmed the operation went as planned.

The mirrors on the $10 billion observatory still must be meticulously aligned, the infrared detectors sufficiently chilled and the scientific instruments calibrated before observations can begin in June.

The James Webb space telescope before launch (NASA) Arianespace's Ariane 5 rocket launches with NASA’s James Webb Space Telescope onboard, Saturday, Dec. 25, 2021, from the ELA-3 Launch Zone of Europe’s Spaceport at the Guiana Space Centre 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 Credit: (NASA/Bill Ingalls) James Webb telescope trajectory

But flight controllers in Baltimore were euphoric after chalking up another success.

“We’re one step closer to uncovering the mysteries of the universe. And I can’t wait to see Webb’s first new views of the universe this summer!” NASA Administrator Bill Nelson said in a statement.

The telescope will enable astronomers to peer back further in time than ever before, all the way back to when the first stars and galaxies were forming 13.7 billion years ago. That’s a mere 100 million years from the Big Bang, when the universe was created.

Besides making stellar observations, Webb will scan the atmospheres of alien worlds for possible signs of life.

“Webb is officially on station,” said Keith Parrish, a manager on the project. “This is just capping off just a remarkable 30 days.”

The telescope was launched from French Guiana on Christmas. A week and a half later, a sunshield as big as a tennis court stretched open on the telescope. The instrument’s gold-coated primary mirror — 21 feet (6.5 meters) across — unfolded a few days later.

The primary mirror has 18 hexagonal segments, each the size of a coffee table, that will have to be painstakingly aligned so that they see as one — a task that will take three months.

“We’re a month in and the baby hasn’t even opened its eyes yet,” Jane Rigby, the operations project scientist, said of the telescope’s infrared instruments. “But that’s the science that we’re looking forward to.”

Monday’s thruster firing put the telescope in orbit around the sun at the so-called second Lagrange point, where the gravitational forces of the sun and Earth balance each other. The 7-ton spacecraft will loop-de-loop around that point while also circling the sun. It will always face Earth’s night side to keep its infrared detectors as frigid as possible.

At 1 million miles (1.6 million kilometers) away, Webb is more than four times as distant as the moon.

The Webb is expected to operate for well over a decade, maybe two.

Considered the successor to the Hubble Space Telescope, which orbits 330 miles (530 kilometers) up, Webb is too far away for emergency repairs. That makes the milestones over the past month — and the ones ahead — all the more critical.

Spacewalking astronauts performed surgery five times on Hubble. The first operation, in 1993, corrected the telescope’s blurry vision, a flaw introduced during the mirror’s construction on the ground.

Whether chasing optical and ultralight light like Hubble or infrared light like Webb, telescopes can see farther and more clearly when operating above Earth’s distorting atmosphere. That’s why NASA teamed up with the European and Canadian space agencies to get Webb and its mirror — the largest ever launched — into the cosmos.
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The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Department of Science Education. The AP is solely responsible for all content.

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NASA’s James Webb Space Telescope reaches final stop, 1 million miles out