James Webb Space Telescope opens

WWell, it worked. This “deep space” photo shows that the James Webb Space Telescope (JWST) is doing what was sent to take a magnificent image of the universe. This image shows SM ACS 0723, a collection of galaxies that are relatively close together. The gravity of this galaxy acts to bend and concentrate light from behind a galaxy far away. So far (although JWST is still in its infancy), the darkest of these “gravitational lens” galaxies is the farthest object that Earthlings have ever noticed.

JWST was launched on Christmas 2021 at a cost of $ 9.7 billion after an 11-year delay. nasa And the European and Canadian space agencies have almost canceled it. But it was too big to sink. Before the lift-off, Thomas Zurbuchen, nasaThe director of science economist “The last thing we want to do is save $ 1 billion and fail.”

However, seven months after the mission, all aspects of launch, deployment, and performance seemed to go as planned, if not improved. As a result, astronomers now have the most powerful tools for scanning the universe with infrared frequency light. This allows us to study many things that we have had a hard time investigating in the past, especially the formation of stars and planets from the youth of the universe over 13 billion years ago to the present.

Heat and dust

After release jwst Maneuvered the road to Lagrange 2 (l2), a point in the space 1.5mkm from the earth. At this location, the gravitational fields of the Earth and the Sun collude to create gravity well.Telescope is not sitting l2. Rather, it orbits it. l2 was chosen because the spacecraft can be fixed in this way and because the Earth and the Sun are in a straight line, the light from both can be blocked by a single shield. Infrared detectors need to be kept cold, so it is important to protect them from external heat sources and light.

On a journey to lTwo telescope operators have unfolded solar panels, antennas to facilitate communication with the Earth, shields, and two mirrors that shape the image. One is a 6.8 meter diameter parabolic primary assembled from hexagonal cells made from gold-plated beryllium. This collects and focuses the incoming electromagnetic radiation. The second is a smaller hyperbolic secondary held in front of the primary by three stanchions. Using a design invented by 17th century French astronomer Laurent Casegrain, this secondary side blocks the narrowing beam from the primary side and reflects it through the central hole in the primary side to four devices. ..

these are Milli (For detection of long infrared wavelengths), nirWith cam nirSpecs (take and analyze short-wave infrared images) fgs/ /Nilis (Study bright targets such as nearby stars orbiting exoplanets).Wavelength investigated by Milli It corresponds to objects such as extrasolar planets that have no internal heat source, and hotter but farther objects whose light is stretched from visible to infrared by the expansion of the universe. “Distant” means “long ago” in the sense of the universe, so you can find signs of the dawn of the universe, the moment the first star in the universe ignites.And in addition to these two advantages, this kind of long wavelength infrared Milli Detection penetrates the dust cloud better than visible light, so it unveils the veil from the fascinating pockets of the sky where the dust coalesces with stars and planets.

The accuracy of the launch meant using less fuel than the budget for the mid-range modifications needed to get the telescope into orbit. It leaves more for the small adjustments needed to keep the equipment in the station. It’s important because stationkeeping is the main constraint on how long a mission can last.The initial goal was 10 years nasa Currently, I think I can keep the telescope in place for 20 seconds. In addition, all four devices are more sensitive than the modeled ones and can collect 10-20% more photons than expected.

The release of this image (fully rendered below) shows the conclusions of the telescope’s test run, along with some images taking place on Tuesday. This is a long process to make sure it fits your purpose. Management has been transferred to the Space Telescope Science Institute in Baltimore, where they have the gracious task of allocating time to enthusiastic astronomers. Fortunately, the new estimate of its useful life means that more demands will eventually be met. The bad thing is that there may be a long wait. ■■

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James Webb Space Telescope opens

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