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Indian astronomers detect giant radio galaxy

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Pune: A team of astronomers working at the National Centre for Radio Astrophysics here has discovered an extremely rare galaxy of gigantic size.

This galaxy — located about nine billion light years away — emits powerful radio waves, the researchers found.

Such galaxies with extremely large ‘radio size’ are called giant radio galaxies.

“Our work presents a case study of a rare example of a GRG (giant radio galaxy) caught in dying phase in the distant universe,” the researchers said.

This newly discovered galaxy known by its scientific identification ‘J021659-044920’ was discovered using the Giant Metrewave Radio Telescope (GMRT), an array of 30 fully steerable, 45-meter diameter antennas, spread out over a 30-km region around Khodad, near Narayangaon town of Pune district.

This project was led by Prathamesh Tamhane from the Indian Institute of Science Education and Research (IISER-Pune) working under the supervision of Yogesh Wadadekar at the National Centre for Radio Astrophysics.

While radio galaxies with size less than a million light years are common, giant radio galaxies are extremely rare, even more so, at large cosmic distances where only a handful has been discovered so far.

This newly discovered galaxy is the newest member of this elite group, the astronomers said.

The findings were detailed in the journal Monthly Notices of the Royal Astronomical Society.

(IANS)

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New Galaxy Has A Smiley Like Structure: NASA

Originally set to last 15 years, Hubble has now been in action making scientific discoveries for more than 28 years.

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NASA, tissue
NASA to send tissue chips to space to test human health, genetic changes. Flcikr

NASA ‘s Hubble Space Telescope has captured a formation of galaxies that looks like a smiling face, said the US space agency.

On Saturday, it posted an image on its Instagram handle that showed two yellow orbs above an arc of light — painting a smiley face in space.

Asking its followers to find the face, NASA explained that using unprecedented resolution of the Hubble’s camera it was able to locate and study regions of star formation.

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This gyro was turned on after the spacecraft entered safe mode due to a failed gyro on October 5. Flickr

The arc of light is a galaxy whose shape has been distorted and stretched as a result of passing a massive gravity source, according to the National Aeronautics and Space Administration.

“The lower, arc-shaped galaxy has the characteristic shape of a galaxy that has been gravitationally lensed — its light has passed near a massive object en route to us, causing it to become distorted and stretched out of shape,” said NASA.

The smiling face is located in the galaxy cluster SDSS J0952+3434, and was shot with the Hubble Space Telescope’s Wide Field Camera 3 (WFC3).

WFIRST, NASA
WFIRST, the Wide Field Infrared Survey Telescope, shown here in an artist’s rendering, will provide astronomers with Hubble-quality images of large swaths of the sky. VOA

The Hubble telescope returned to normal operations on October 26 after successfully recovering a backup gyroscope replacing a failed in October.

Also Read: Hubble Precisely Measures Distance to Globular Star Cluster

Originally set to last 15 years, Hubble has now been in action making scientific discoveries for more than 28 years. (IANS)