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Mysterious Blast Studied with NASA Telescopes

Dragon
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Post by Dragon on Fri Jan 11, 2019 9:26 pm

A brief and unusual flash spotted in the night sky on June 16, 2018, puzzled astronomers and astrophysicists across the globe. The event — called AT2018cow and nicknamed "the Cow" after the coincidental final letters in its official name — is unlike any celestial outburst ever seen before, prompting multiple theories about its source.

Over three days, the Cow produced a sudden explosion of light at least 10 times brighter than a typical supernova, and then it faded over the next few months. This unusual event occurred inside or near a star-forming galaxy known as CGCG 137-068, located about 200 million light-years away in the constellation Hercules. The Cow was first observed by the NASA-funded Asteroid Terrestrial-impact Last Alert System telescope in Hawaii.

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Mysterious Blast Studied with NASA Telescopes  334pu7m
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Post by Dragon on Fri Jan 11, 2019 9:28 pm

Mysterious Blast Studied with NASA Telescopes  Nustar20190110
Credits: Sloan Digital Sky Survey

AT2018cow erupted in or near a galaxy known as CGCG 137-068, which is located about 200 million light-years away in the constellation Hercules. This zoomed-in image shows the location of the "Cow" in the galaxy.

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Post by Dragon on Fri Jan 11, 2019 9:29 pm

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Credits: Daniel Perley, Liverpool John Moores University

Astronomers using ground-based observatories caught the progression of a cosmic event nicknamed "the Cow," as seen in these three images.

Left: The Sloan Digital Sky Survey in New Mexico observed the host galaxy Z 137-068 in 2003, with the Cow nowhere in sight. (The green circle indicates the location where the Cow eventually appeared).

Center: The Liverpool Telescope in Spain’s Canary Islands saw the Cow very close to the event’s peak brightness on June 20, 2018, when it was much brighter than the host galaxy.

Right: The William Herschel Telescope, also in the Canary Islands, took a high-resolution image of the Cow nearly a month after it reached peak brightness, as it faded and the host galaxy came back into view.

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Mysterious Blast Studied with NASA Telescopes  334pu7m
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Post by Dragon on Fri Jan 11, 2019 9:30 pm



Watch what scientists think happens when a black hole tears apart a hot, dense white dwarf star.

A team working with observations from NASA's Neil Gehrels Swift Observatory suggests this process explains a mysterious outburst known as AT2018cow, or "the Cow."


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Post by Button on Fri Jan 11, 2019 10:21 pm

This is very interesting dragon I have been reading about this ty for shareing

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