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SN 1993J (Supernova Remnant)


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SN 1993J
Supernova Remnant (超新星残骸)
SNR

星座 (Constellation)
おおぐま座 (UMa) (Ursa Major)


距離 (Distance)
1,200万光年 (12 million light-years)

SN 1993J is a supernova remnant located 12 million light years from the Earth in the constellation Ursa Major.

SN 1993J (Supernova Remnant) : Picture

SN 1993J (Supernova Remnant)
SN 1993J (Supernova Remnant) (artist's impression)
(C) NASA, ESA, and G. Bacon (STScI)
This is an artist's impression of supernova 1993J, an exploding star in the galaxy M81 whose light reached us 21 years ago. The supernova originated in a double-star system where one member was a massive star that exploded after siphoning most of its hydrogen envelope to its companion star. After two decades, astronomers have at last identified the blue helium-burning companion star, seen at the center of the expanding nebula of debris from the supernova. The NASA/ESA Hubble Space Telescope identified the ultraviolet glow of the surviving companion embedded in the fading glow of the supernova.

Supernova 1993J
Supernova 1993J exploding (artist's impression)
(C) ESA and Justyn R. Maund (University of Cambridge)
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.

Supernova 1993J
The site of the Supernova 1993J explosion
(C) ESA and Justyn R. Maund (University of Cambridge)
A virtual journey into one of the spiral arms of the grand spiral Messier 81 (imaged with the Isaac Newton Telescope on La Palma, left) reveals the superb razor-sharp imaging power of the NASA/ESA Hubble Space Telescope (Hubble's WFPC2 instrument, below). The close-up (with Hubble's ACS, to the right) is centred on the newly discovered companion star to Supernova 1993J that itself is no longer visible. The quarter-circle around the supernova companion is a so-called light echo originating from sheets of dust in the galaxy reflecting light from the original supernova explosion.

SN 1993J (Supernova Remnant) Supernova 1993J
SN 1993J (Supernova Remnant)
(C) NASA/ESA
Supernova 1993J
(C) ESA
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SN 1993J (Supernova Remnant) : Movie

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