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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 (roughly less than 10 to 300 parsecs [30 to 1000 light-years] away [2]) to have noticeable effects on Earth's biosphere.
The nebula RCW 34 is relatively dark. However, when observed using infrared wavelengths, two different areas are visible - one half of the nebula is bright, and the other is dark. The bright side is the hydrogen illuminated by a nearby blue supergiant star , and dark is the place where new stars surround the central star on the other side.
Messier 61 with supernova SN2020jfo, taken by an amateur astronomer in 2020 The late-time decay phase of visual light curves for different supernova types all depend on radioactive heating, but they vary in shape and amplitude because of the underlying mechanisms, the way that visible radiation is produced, the epoch of its observation, and the ...
IC 2220, also known as the Toby Jug Nebula, is a reflection nebula located 1200 light years away in the southern constellation of Carina. [3] The nebula was observed by the Gemini South telescope in 2023. It has an almost symmetrical bipolar structure, made up of gas and dust, reflecting light of the central red giant star HR 3126.
NGC 2020 is an HII Region surrounding the Wolf-Rayet star BAT99-59. [2] It is located in the Large Magellanic Cloud . The nebula was discovered on 30 December 1836 by polymath John Herschel . [ 3 ]
NGC 2371-2 is a dual lobed planetary nebula located in the constellation Gemini.Visually, it appears like it could be two separate objects; therefore, two entries were given to the planetary nebula by John Louis Emil Dreyer in the New General Catalogue, so it may be referred to as NGC 2371, NGC 2372, or variations on this name. [1]
At this time, nebula had yet to be accepted as independent galaxies. NGC 4594 was measured originally as 1000 km/s, then refined to 1100, and then to 1180 in 1916. [204] [208] [211] Arcturus (Alpha Bootis) Star: 1891 − 1910 160 ly (18 mas) (this is very inaccurate, true=37 ly)
The Omega Nebula is between 5,000 and 6,000 light-years from Earth and it spans some 15 light-years in diameter. The cloud of interstellar matter of which this nebula is a part is roughly 40 light-years in diameter and has a mass of 30,000 solar masses. [3]