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A near-Earth supernova is a supernova close enough to the Earth to have noticeable effects on its biosphere. Depending upon the type and energy of the supernova, it could be as far as 3,000 light-years away. In 1996 it was theorised that traces of past supernovae might be detectable on Earth in the form of metal isotope signatures in rock strata.
The Crab Nebula is a pulsar wind nebula associated with the 1054 supernova.It is located about 6,500 light-years from the Earth. [1]A near-Earth supernova is an explosion resulting from the death of a star that occurs close enough to the Earth (less than roughly 10 to 300 parsecs [33 to 978 light-years] away [2]) to have noticeable effects on Earth's biosphere.
In recent years, astronomers studying the red supergiant Betelgeuse, about 645 light-years away from Earth in the Milky Way, have seen that star unexpectedly dim, which led some to believe it was ...
Near-Earth asteroid (99942) Apophis will pass Earth at a relatively small distance of 31,200 km (19,400 mi) above Earth's surface, closer than some geosynchronous satellites. [5] 2029 June 26 Total lunar eclipse. With an umbral eclipse magnitude of 1.84362, it will be the largest total lunar eclipse of the 21st century. 2029 December 20
Most recent Local Group supernova SN 1993J: Ursa Major +10.7 [18] 11,000,000 IIb M81: One of the brightest supernovae in the northern sky since 1954 SN 1994D: Virgo +15.2 50,000,000 Ia NGC 4526: SN 1998bw: Telescopium? 140,000,000 Ic ESO 184-G82: Linked to GRB 980425, which was the first time a gamma-ray burst has been linked to a supernova. SN ...
The cause of the Devonian period extinction 359 million years ago, ranked as one of the five great extinctions of life on Earth, remains a mystery. Now, a new study reveals the explosion of a ...
Within the Milky Way galaxy, supernova explosions occur on average once every 40 years. [33] During the history of Earth, multiple such events have likely occurred within a distance of 100 light-years; known as a near-Earth supernova. Explosions inside this distance can contaminate the planet with radioisotopes and possibly impact the biosphere ...
The supernova was about 21 million light-years from Earth and is expected to have left behind either a neutron star or black hole, based on current stellar evolution models. The supernova is located near a prominent HII region, NGC 5461, in an outer spiral arm of the bright galaxy. [3] By 22 May 2023, SN 2023ixf had brightened to about ...