June 26, 2022

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The Web Space Telescope presents the first images of a star in the Big Dipper

The James-Webb Space Telescope (NASA) reached its target on January 24 at Lagrange Point, also known as L2. He begins to present pictures of his first target, HD 84406, a star Type G and so similar to the sun, Ursa is located about 258 light-years away in the Major galaxy.

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[EN VIDÉO] Understand the mission of the James Webb Space Telescope in a minute
The new James Webb Space Telescope, the first flagship in space observation, will be launched on December 18 from Guerrero, Guyana. After a journey of 29 days, it reaches Lagrange point L2 in the opposite direction to the Sun. Because it is larger than Hubble’s mirror, which is considered its successor, JWST can learn more about the history of the universe by looking at galaxies, planets, nebulae, and stars.

The James-Webb Space Telescope is particularly expected to make analysis possibleAtmosphere Ofexoterres Inside Around the circular path Around the sun type stars in the hope of finding Survival signatures Evidence for the existence of such a creature on earth as we know it. Therefore, one can only be interested in specifying that one of the planned steps to operate the tool, i.e. getting the images, goes exactly as planned.Star HD 84406 is located at approximately 258 Light years Solar family only.

The NASA These images, which are in the form of 18 glowing dots as seen in the photo below, have now been released to the public. They are the result of the accumulation of photons and grains of light carried by the instrument Near the infrared camera (NIRCam) A total of approximately 25 hours of surveillance launched on February 2, 2022.

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We look at 18 pictures of the star located at Ursa is the main galaxy Because of the 18 hexagonal elements Glass The primary telescope is not yet well integrated and is not tuned to create a single, well-focused image. This is the whole point of the process, which is to develop a way of instrumentation and then carry out scientific research. The cooling of each of these elements is reduced below 50 Kelvins Still going on. The Astronomers And the engineers working on running the entire James-Webb will have a month or more to make the changes to create the high-quality image of the HD 84406.

The entire web team is pleased with the quality of the first steps in taking pictures and aligning the telescope. We were very happy to see the light coming on NIRCam Said Marcia Rieke, chief researcher on the NIRCam instrument and professor of astronomy at the University of Arizona.

Lee Feinberg, components manager for Web Optical Telescope Goddard Space Aviation Center From NASA, illustrates the first steps in the process of orienting hexagonal mirrors. To get the most accurate French translation, click on the white rectangle in the lower right. English verses should appear later. Then click on the nut to the right of the rectangle, then “Verses” and finally “Auto Translate”. Select “French”. © James Webb Space Telescope (JWST)

The Web Space Telescope will open its giant eye to this star in the Big Dipper

Article of Natalie Mayor Released on 05/02/2022

The James Webb Space Telescope (NASA) reached its target on January 24, known as the LockRange 2 point. He is now ready to return to his first goal. Ursa is a star located in the Major constellation.

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This time it is. Four main tools James Webb Space Telescope Enabled (JWST, Nasa). The telescope will soon be ready to return to its first destination: a star called the HD 84406. A star in the Big Tipper, ours The sun Located 260 light-years from Earth. With her Size About 6.7, it seemsEye Naked.

Pictures of this star will be taken Infrared camera Near JWST (NIRCam). They are not used directly for scientific purposes. But the star makes a brilliant goal to help the engineers sort out the 18 gold pieces of the main glass of the James Webb Space Telescope more than 6 meters wide. Their purpose: to succeed in creating a clear image from the 18 blurred images that each part must first return.

A lot more corrections have to be made

These changes should continue until the end of April. And they are considered important. If NIRCam fails in this task, the engineers will lose any opportunity for alignment JWST Glass.

According to NASA scientists, it appears to be HD 84406 “The perfect destination to start our search for photons”. On the other hand, once JWST is fully operational – not before next June, because its tools still have a few weeks to reach their operating temperature –Ursa is the main star Will become too bright to read by a powerful instrument.