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New observations with the Hubble Space Telescope allow a look into a supernova explosion under development. ⠀
In this artist's view the red supergiant supernova progenitor star (left) is exploding after having transferred about 10 solar masses of hydrogen gas to the blue companion star (right).⠀
This interaction process happened over about 250 years and affected the supernova explosion to such an extent that SN 1993J was later known as one of the most peculiar supernovae ever seen.⠀
Credit:ESA/Hubble (M. Kornmesser & L. L. Christensen)
8 hours ago
Do you know what is a Supernova?⠀
🔭This dark, tangled web is an object named SNR 0454-67.2. It formed in a very violent fashion — it is a supernova remnant, created after a massive #star ended its life in a cataclysmic explosion and threw its constituent material out into surrounding #space. SNR 0454-67.2 is situated in the Large Magellanic Cloud, a dwarf #galaxy that lies close to the #milkyway . The remnant is likely the result of a Type Ia #supernova explosion; this category of supernovae is formed from the death of a white dwarf star that grows by siphoning material from a stellar companion until it reaches a critical mass and then explodes.⠀
🔎Source & Caption 👇 @beyondthesolarsystem⠀
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Sit back and watch a Supernova explosion, 50 million light years away.
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The actual explosion happened 50 million years ago but images of the spectacular event began arriving 4 years ago. Supernova 2015F was discovered in nearby spiral galaxy NGC 2442 by Berto Monard in 2015 March and was unusually bright, billions of times the luminosity of our Sun -- enough to be seen with only a small telescope. The pattern of brightness variation indicated a Type Ia supernova -- a type of stellar explosion that results when an Earth-size white dwarf gains so much mass that its core crosses the threshold of nuclear fusion, possibly caused by a lower mass white-dwarf companion spiraling into it. The Meathook Galaxy is the lucky cosmic island hosting it.
Video Credit & Copyright: Changsu Choi & Myungshin Im (Seoul National University)
Source: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
What are supernovas? is a powerful and luminous stellar explosion. This transient astronomical event occurs during the last evolutionary stages of a massive star or when a white dwarf is triggered into runaway nuclear fusion. The original object, called the progenitor, either collapses to a neutron star or black hole, or it is completely destroyed. The peak optical luminosity of a supernova can be comparable to that of an entire galaxy, before fading over several weeks or months.
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