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And then there was light! First photons strike iconic golden mirrors on James Webb Telescope

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3 years ago

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And then there was light! First photons strike iconic golden mirrors on James Webb Telescope

Just over a week after reaching the second Lagrangian point (L2), the James Webb Telescope will begin observing the birth of our universe, beginning a three-month process of calibrating the mirrors. The telescope received the first batch of starlight photons that passed through the entire observatory and were detected by the Near Infrared Camera (NIRCam) instrument.

This marks the beginning of the process of aligning 18 mirrors to direct light onto a mirror to observe infrared light from distant worlds, galaxies and the origin of our universe. Data from NIRCam will be used by engineers at Ball Aerospace, the Space Telescope Science Institute and NASA’s Goddard Space Flight Center to calibrate the telescope.

“This milestone marks the first of many steps in capturing initially unfocused images and using them to slowly fine-tune the telescope. This is the beginning of the process, but so far the initial results are in line with expectations and simulations,” NASA The bureau said in a statement.

Align the mirror
The process of calibrating a telescope has been practiced many times on the ground before it is used in the vacuum of space. The team developed a 1/6 scale model telescope for testing. Over the next three months, the telescope will be calibrated in seven stages, followed by the commissioning of the onboard instruments.

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However, NASA made it clear that Webb’s images during this period won’t be as “pretty” as Webb’s new view of the universe, which will be released later this summer. They serve strictly the purpose of preparing telescopes for science. To work together, the telescope’s 18 primary mirror segments need to be matched to each other to a fraction of the wavelength of light around 50 nanometers, NASA said.

Complete News Source : India Today

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Nasa’s old map of Jupiter, which reminds many of dosa, has gone viral once more

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3 years ago

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May 25, 2022

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Nasa’s old map of Jupiter, which reminds many of dosa, has gone viral once more

Certain images or videos frequently resurface on the Internet, leaving people speechless. When those clips or pictures are shared again on one social media platform or another, they create a buzz. The National Aeronautics and Space Administration (Nasa) created and posted this image of a map of Jupiter online a few years ago. After being shared on Twitter, the image drew a lot of attention this time. And, as usual, the image made people think of dosa, a popular South Indian dish.

The image was shared by the Twitter account Latest in Space. “From the very bottom of Jupiter, I’m looking up. While tweeting the image, they wrote, “Seen by NASA Cassini.” The images from the Cassini spacecraft’s narrow-angle camera were used to create this out-of-this-world image, which is part of a coloured map series produced by the space agency.

The article was published a few days ago. The tweet has received nearly 20,000 likes since it was shared, and the number is growing. The tweet has been retweeted more than 2,000 times. Take a look at some of the comments to see how the image of Jupiter looks like dosa.

A Twitter user commented, “Looks like a designer dosa.” “When I rush to pick up a call, this is what happens to my dosa on the dosa pan,” one joked. “This is how my mother makes Dosa,” a third said. “Jupiter in the making,” wrote a fourth, along with a photo of someone preparing – you guessed it – dosa.

 

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