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Gamma-Ray Burst

Bryce Space posted on Aug 03, 2020
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Description


Gamma-ray bursts (GRBs) are short-lived bursts of gamma-ray light, the most energetic form of light. Lasting anywhere from a few milliseconds to several minutes, GRBs shine hundreds of times brighter than a typical supernova and about a million trillion times as bright as the Sun. When a GRB erupts, it is briefly the brightest source of cosmic gamma-ray photons in the observable Universe. Until recently, GRBs were arguably the biggest mystery in high-energy astronomy. They were discovered serendipitously in the late 1960s by U.S. military satellites which were on the lookout for Soviet nuclear testing in violation of the atmospheric nuclear test ban treaty. These satellites carried gamma ray detectors since a nuclear explosion produces gamma rays. They didn't find any violations of the nuclear treaty, but they did discover bright bursts of gamma rays from beyond the solar system. Evidence from recent satellites like Swift and Fermi indicate that the energy behind a gamma-ray burst comes from the collapse of matter into a black hole. ________________________________________________ Les sursauts gamma (GRB) sont des sursauts de courte durée de lumière gamma, la forme de lumière la plus énergétique. D'une durée allant de quelques millisecondes à plusieurs minutes, les GRB brillent des centaines de fois plus brillants qu'une supernova typique et environ un million de milliards de fois plus brillants que le Soleil. Lorsqu'un GRB entre en éruption, il est brièvement la source la plus brillante de photons cosmiques gamma dans l'univers observable. Jusqu'à récemment, les GRB étaient sans doute le plus grand mystère de l'astronomie des hautes énergies. Ils ont été découverts par hasard à la fin des années 1960 par des satellites militaires américains qui étaient à l'affût d'essais nucléaires soviétiques en violation du traité d'interdiction des essais nucléaires atmosphériques. Ces satellites portaient des détecteurs de rayons gamma car une explosion nucléaire produit des rayons gamma. Ils n'ont trouvé aucune violation du traité nucléaire, mais ils ont découvert de brillantes rafales de rayons gamma venant d'au-delà du système solaire. Les preuves de satellites récents comme Swift et Fermi indiquent que l'énergie derrière un sursaut gamma provient de l'effondrement de la matière dans un trou noir.

Comments (16)


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jmb007

12:25PM | Mon, 03 August 2020

jolie

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farmerC

1:33PM | Mon, 03 August 2020

Shining done.

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bugsnouveau

2:12PM | Mon, 03 August 2020

Too cool

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miwi

4:12PM | Mon, 03 August 2020

I just hope our planet will never be hit by one;klasse image,excellent work!!!!!!!!!!!!!!

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Radar_rad-dude

4:49PM | Mon, 03 August 2020

A very powerful image! Too cool

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jendellas

5:03PM | Mon, 03 August 2020

Thanks for the interesting info. Great image.

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Madbat

5:34PM | Mon, 03 August 2020

Science!

Always good stuff!

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daggerwilldo

2:05AM | Tue, 04 August 2020

Really wonderful work. The image is quite beautiful. I don’t think I would want to get in the way of one. Very sensational work and a total joy to view.

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ikke.evc

2:05AM | Tue, 04 August 2020

Nicely done.

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BryceHoro

4:22AM | Tue, 04 August 2020

Interesting explanation, well done depiction of such an event.

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Koala44

4:34AM | Tue, 04 August 2020

Splendide réalisation.

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crender

9:25AM | Tue, 04 August 2020

Excellent ! ! ❤

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madame

11:06AM | Tue, 04 August 2020

Très beaux effets de luminosité... excellente réalisation !! Merci pour les infos c'est très instructif !

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RodS

8:06PM | Tue, 04 August 2020

It's left over energy from those Death Stars a long time ago...

Excellent work!

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marcPoser

8:28AM | Wed, 05 August 2020

Quand les intérêts militaires rejoignent la science! Intéressant!

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DukeNukem2005

12:36PM | Sat, 19 September 2020

Bravo! Exellent! Original idea!


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