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Locked and loaded! James Webb Telescope locks on star for guidance in space

Published

3 years ago

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Locked and loaded! James Webb Telescope locks on star for guidance in space

A few days after it began calibrating the mirrors, the James Webb Telescope locked onto a guide star with its fine guidance sensor to keep the telescope pointed with high precision. After the telescope first detected starlight in a near-infrared (NIRCam) camera, engineers launched the Fine Guidance Sensor on Jan. 28 for activity and functional testing.

Developed in conjunction with Canada’s Near Infrared Imager and Slitless Spectrometer, the sensor measures the exact position of the guide star in its field of view 16 times per second and sends adjustments to the telescope’s fine-steering mirror about three times per second.

The sensor is so powerful that someone in New York City can see the blinking eye movement of someone 500 kilometers away on the Canadian border, said FGS and NIRISS principal investigators René Doyon and Nathalie Ouellette.

“Webb’s 18 primary segments are not yet aligned, so each star appears as 18 duplicate images. On February 13, FGS successfully acquired and tracked one of the constellations for the first time.

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It should be noted that engineers now use FGS guidelines in most telescope mirror alignment procedures and provide diagnostic information for mirror alignment. The telescope is in a three-month commissioning phase as it receives the first batch of starlight photons that traveled through the observatory and were captured by the Near Infrared Camera (NIRCam) instrument.

Before the telescope was used in the vacuum of space, it made several sightings on the ground.

The James Webb Space Telescope, the successor to the legendary Hubble Space Telescope, was launched in December from the European Spaceport in French Guiana on a powerful Ariane 5 rocket to a destination nearly 15,00,000 kilometers from its parent star .

Developed by scientists and engineers from 14 countries around the world, the telescope required 40 million man-hours to complete before it was attached to the rocket. The telescope is so sensitive that it could theoretically detect bumblebee heat at the Moon’s distance from Earth.

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

Published

2 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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