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The Wall Street Publication > Blog > Tech > James Webb Space Telescope Reaches Final Destination
Tech

James Webb Space Telescope Reaches Final Destination

Editorial Board Published January 24, 2022
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James Webb Space Telescope Reaches Final Destination
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The James Webb Space Telescope arrived at its final destination about 1 million miles from Earth, marking the latest milestone for an instrument that astronomers expect to capture unprecedented views of far-flung galaxies and provide new insights into the origins of the universe.

The National Aeronautics and Space Administration said shortly after 2 p.m. ET Monday that the $10 billion, truck-size telescope had reached a spot in orbit around the sun where it will operate for the duration of its mission. At that location, known as Lagrange 2, or L2, the gravitational forces exerted by the sun and Earth balance out a spacecraft’s orbital motion, allowing it to remain in a fixed spot relative to our planet, according to the agency.

“Everything we’re doing is about getting the observatory ready to do transformative science,” said Jane Rigby, a Webb operations project scientist at NASA’s Goddard Space Flight Center. “That’s why we’re here.”

Unlike the Hubble telescope, which orbits the Earth, the Webb will travel around the sun.

Hubble orbit

350 miles

from Earth

Webb

orbit

1 million miles

Note: not to scale

Webb orbit

1 million miles

Hubble orbit

350 miles

from Earth

Note: not to scale

Webb orbit

1 million miles

Hubble orbit

350 miles

from Earth

Note: not to scale

To reach its orbit at L2, ground teams Monday afternoon fired the telescope’s thrusters for about five minutes, NASA said. It was the latest in a series of course corrections executed by Webb since it was launched on an Ariane 5 rocket from a European Space Agency facility in French Guiana on Dec. 25.

Webb’s orbital perch at L2 allows the telescope to remain in place without expending large amounts of fuel and will help NASA maintain contact with the telescope, according to the agency.

NASA said that Webb used as little fuel as possible during the course corrections in order to leave as much as possible for its regular operations, such as carrying out small maneuvers every 21 days or so to keep the telescope in its desired orbit. Webb might be able to operate for a couple of decades, said Keith Parrish, observatory commissioning manager for Webb at NASA’s Goddard facility.

HUBBLE SPACE TELESCOPE

JAMES WEBB SPACE TELESCOPE

Primary

mirror

Secondary

mirror

The Webb mirror has 6.25 times as much collecting area as the Hubble’s.

6-foot person

JAMES WEBB SPACE TELESCOPE

Primary

mirror

Secondary

mirror

HUBBLE SPACE TELESCOPE

The Webb mirror has 6.25 times as much collecting area as the Hubble’s.

6-foot person

JAMES WEBB SPACE TELESCOPE

Primary

mirror

Secondary

mirror

HUBBLE SPACE TELESCOPE

The Webb mirror has 6.25 times as much collecting area as the Hubble’s.

6-foot person

Several hurdles remain before the telescope begins its mission, including aligning the instrument’s mirrors and calibrating onboard instruments. Routine science operations are expected to start in about five months, according to NASA. With its 21.5-foot-wide golden main mirror and infrared sensors, the telescope is 100 times as powerful as the Hubble Space Telescope and is designed to capture images of stars and galaxies as they were 13.5 billion years ago.

Monday’s milestone was the latest during a high-stakes deployment that included the unfolding of Webb’s mirrors, which at launch were stowed, origami style, in the rocket’s nose cone. Built by a team led by Northrop Grumman Corp. , Webb has 344 separate “single-point failure” components that, had any failed, could have scuttled the entire mission.

“The best is yet to come,” Mr. Parrish said.

The James Webb Space Telescope, a collaboration between NASA, the European Space Agency and the Canadian Space Agency, just launched. Scientists say its technology makes it 100 times more powerful than the Hubble and could give it the ability to see back to the first galaxies in the universe. Photo: Jody Amiet/AFP/Getty

Write to Micah Maidenberg at [email protected]

Copyright ©2022 Dow Jones & Company, Inc. All Rights Reserved. 87990cbe856818d5eddac44c7b1cdeb8

Appeared in the January 25, 2022, print edition as ‘Webb Telescope Reaches Orbit a Million Miles From Earth.’

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