SNR G1.9 + 0.3

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Supernova
SNR G1.9 + 0.3
Admission of the Chandra Space Observatory
Admission of the Chandra Space Observatory
Constellation Sagittarius
Position
equinox : J2000.0
Right ascension 17h 48m 45s
declination -27 ° 10 ′ 00 ″
Further data
distance

25,000 light years

history
Catalog names
Aladin previewer

SNR G1.9 + 0.3 is the youngest known supernova remnant in the Milky Way . The remnant was prepared by combining the data from the X-ray telescope Chandra of NASA and the radio telescope system Very Large Array discovered (VLA). The radiation from the star explosion probably only reached Earth about 140 years ago. However, due to the distance of 25,000 light years , the explosion took place around 25,000 years ago. Before this discovery, Cassiopeia A was the youngest known supernova remnant at around 330 years old.

discovery

SNR G1.9 + 0.3 was discovered for the first time in 1984 as a strong galactic (i.e. located within the Milky Way) radio source by astronomers with the VLA. In 2007, images of the presumed supernova remnant were made with the Chandra X-ray telescope and compared with images from 1985. The difference in size made it possible for astronomers to determine the time of the supernova explosion (approx. 1868 AD , relative to Earth time). Observations with the VLA in 2008 confirmed that SNR G1.9 + 0.3 expands at a speed of approx. 56 million kilometers per hour (well over 5 percent of the speed of light ).

At the time of the explosion, the supernova was not visually sighted by astronomers because it is close to the galactic center and is obscured by interstellar dust . Astronomers have only been able to see through it since the advent of radio astronomy and X-ray astronomy .

Announcement

The discovery was announced on May 14, 2008 at a NASA press conference . Prior to the announcement, NASA only hinted that they would announce "the discovery of an object within our galaxy that astronomers have been looking for for more than 50 years."

Web links

Individual evidence

  1. ↑ G1.9 + 0.3: Discovery of Most Recent Supernova in Our Galaxy. . NASA. 2008/05/14. Retrieved May 14, 2008.
  2. ^ NASA to Announce Success of Long Galactic Hunt . NASA. Retrieved May 14, 2008.