Tag: jwst

NASA’s James Webb Telescope Captures Colourful Cartwheel Galaxy: Details

The James Webb Space Telescope has peered through time and huge amounts of dust to capture a new image of the Cartwheel Galaxy, revealing the spinning ring of colour in unprecedented clarity, NASA and the European Space Agency said Tuesday. Located around 500 million light-years from Earth in the constellation Sculptor, the Cartwheel gained its shape during a spectacular head-on collision between two galaxies.

The impact sent two rings expanding from the galaxy’s centre, “like ripples in a pond after a stone is tossed into it”, NASA and the ESA said in a joint statement.

A smaller white ring remains closer to the galaxy’s centre, while the outer ring, with its spokes of colour, has been expanding into the universe for around 440 million years, the statement added.

As the outer ring expands it runs into gas, sparking the formation of new stars.

The Hubble telescope had previously captured images of the rare ring galaxy, which is believed to have been a spiral galaxy like our own Milky Way before it was hit by a smaller intruder galaxy.

But the Webb telescope, which launched in December 2021 and revealed its first images to global fanfare last month, has a far greater reach.

Webb’s ability to detect infrared light allowed it to see through the “tremendous amount of hot dust” obscuring the view of the Cartwheel Galaxy, NASA and the ESA said.

This revealed new details about star formation in the galaxy, as well as the behaviour of the supermassive black hole at its heart, they said.

It was also able to detect regions rich in hydrocarbons and other chemicals, as well as dust that is similar to dust on Earth.

Behind the Cartwheel, two smaller galaxies shine brightly, while even more galaxies can be seen behind them.

The observations show that the Cartwheel Galaxy is still in “very transitory stage”, the space agencies said.

“While Webb gives us a snapshot of the current state of the Cartwheel, it also provides insight into what happened to this galaxy in the past and how it will evolve in the future.”

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NASA’s James Webb Telescope Damaged After Being Hit By Space Rock: Report

The world’s largest and most powerful space telescope by NASA, James Webb Space Telescope (JWST), has suffered massive damage from an asteroid strike in May. 

The telescope was built by the National Aeronautics and Space Administration (NASA), in collaboration with the European Space Agency (ESA), and the Canadian Space Agency (CSA). It is made up of precious technology and it carries one of the largest mirrors on a space telescope in order to observe phenomena and events in space previously inaccessible to the world. 

For the telescope to fulfil this ambition, it is required that the JWST remains operational for years to come. However, concerns are now being raised over the longevity of the project as it was revealed that an asteroid strike in May 2022 might have left the telescope in worse shape than previously understood. 

As per Forbes, a group of scientists outlined the performance of the space telescope. They reported problems that “cannot be corrected”. Writing about the projected lifetime of the Webb telescope, the researchers said, “At present, the largest source of uncertainty is long-term effects of micrometeoroid impacts that slowly degrade the primary mirror.”

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The scientists informed that since the launch, the Webb telescope has been struck by six micrometeorites. While five of the meteorites did a negligible amount of damage, a sixth caused some damage to the JWST. 

Providing more information regarding the asteroid strike, the researchers said, “The micrometeoroid which hit segment C3 in the period 22—24 May 2022 UT caused a significant uncorrectable change in the overall figure of that segment. However, the effect was small at the full telescope level because only a small portion of the telescope area was affected.” 

Notably, as the damage has taken place on one of the panels, it will not impact the Webb telescope’s image-taking abilities at all. However, as per the outlet, the engineers who designed Webb know that its mirrors and sun-shield will unavoidably slowly degrade from micrometeoroid impacts. 

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Moreover, scientists also expect Webb’s detectors to be gradually damaged by charged particles. They believe that its sun-shield and innovative five-layer insulation will degrade from space weathering. Since its mirror is exposed to space, the researchers also said that micrometeoroid strikes are difficult for Webb to avoid.

The $9.7 billion space telescope was launched on Christmas Day in 2021. Earlier this month, NASA revealed the first of many images that it captured of deep space.

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