Science
NASA’s James Webb telescope to enter final and crucial stage of deploying its tennis court-sized sunshield
After decades of research and development, NASA finally launched the James Webb telescope last Christmas. The historic launch was successful after some delays, but this was only the first obstacle considering the complexity of the cellular space telescope. Next is a series of deployments of the most important parts of the telescope.
The movable parts of the James Webb telescope are folded so that the telescope is small enough to fit a 16-foot Ariane 5 rocket. The $10 billion telescope has a total of 50 major deployments and 178 release mechanisms before it is fully formed. The telescope has now reached the most critical part of unfolding its huge five-layer sunshade the size of a tennis court.
NASA began tensioning the first layer of the sun visor on Monday, followed by the second and third layers. These three layers are closest to the sun, and the entire tightening process requires five and a half hours for the team to complete. The tensioning of the last two layers of the Weber visor will take place tomorrow. “The membrane tensioning phase of sun visor deployment is particularly challenging because of the complex interactions between structure, tensioning mechanism, cables, and membranes,” said James Cooper, NASA’s Webb Visor Manager, at Goda Work at the German Space Flight Center.
After the last two layers are tightened, the sun visor will be fully deployed. This five-layer sun visor is important because it can protect the telescope from solar radiation. Since the James Webb telescope has infrared light observations, the instruments inside the telescope must be kept extremely cold. The sun visor not only protects it from solar radiation, but also protects other sources of light and heat, including the heat emitted by the observatory itself.
The final destination of the James Webb telescope is the second Lagrangian point or L2, which is 1 million miles from the earth. Unlike the Hubble telescope, the Webb telescope does not orbit the earth, but orbits the sun. The mission of the telescope is to observe very weak infrared signals from very distant objects and to help scientists learn more about the origin of our universe.
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Science
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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