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Cassiopeia A ( Cas A) ( listen ⓘ) is a supernova remnant (SNR) in the constellation Cassiopeia and the brightest extrasolar radio source in the sky at frequencies above 1 GHz. The supernova occurred approximately 11,000 light-years (3.4 kpc) away within the Milky Way; [ 2 ][ 3 ] given the width of the Orion Arm, it lies in the next-nearest ...
SN 1054 remnant (Crab Nebula)A supernova is an event in which a star destroys itself in an explosion which can briefly become as luminous as an entire galaxy.This list of supernovae of historical significance includes events that were observed prior to the development of photography, and individual events that have been the subject of a scientific paper that contributed to supernova theory.
Markus Alexej Persson was born in Stockholm, Sweden, to a Finnish mother, Ritva, [18] and a Swedish father, Birger, [19] on 1 June 1979. [20] [21] [18] He has one sister.[18] [22] He grew up in Edsbyn until he was seven years old, when his family moved back to Stockholm.
Septium are gemstones that align with one of seven elements: Earth, Fire, Water, Wind, Space, Mirage, and Time. Septium is central to the function of Orbal energy, which can power appliances, vehicles, or channel elemental power in the form of "Arts", magical techniques used in combat. Silver rock stone. Pokémon.
List of supernova remnants. This is a list of observed supernova remnants (SNRs) in the Milky Way, as well as galaxies nearby enough to resolve individual nebulae, such as the Large and Small Magellanic Clouds and the Andromeda Galaxy . Supernova remnants typically only survive for a few tens of thousands of years, making all known SNRs fairly ...
Youngest Toba eruption. Coordinates: 2.6845°N 98.8756°E. The Toba eruption (sometimes called the Toba supereruption or the Youngest Toba eruption) was a supervolcanic eruption that occurred about 74,000 years ago during the Late Pleistocene [ 1] at the site of present-day Lake Toba in Sumatra, Indonesia. It was the last in a series of at ...
Black dwarf. A black dwarf is a theoretical stellar remnant, specifically a white dwarf that has cooled sufficiently to no longer emit significant heat or light. Because the time required for a white dwarf to reach this state is calculated to be longer than the current age of the universe (13.8 billion years), no black dwarfs are expected to ...
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 ...