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Cygnus OB2 #12 is an extremely luminous blue hypergiant with an absolute bolometric magnitude (all electromagnetic radiation) of −10.9, among the most luminous stars known in the galaxy. This makes the star nearly two million times more luminous than the Sun, although estimates were even higher when the star was first discovered.
Their color varies from blue-grey to very red (classes BB, BR, IR and RR). The following list also gives an object's full designation , mean-diameter (D), and discovery circumstances (date, discoverer and discovery site ), as well as its orbital inclination ( i ) and eccentricity (e).
The blue half-ring centered near the left edge represents the orbit of Neptune, the outermost planet of the Solar System. Stars with an initial mass above about 25 M ☉ quickly move away from the main sequence and increase somewhat in luminosity to become blue supergiants. They cool and enlarge at approximately constant luminosity to become a ...
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.
According to game director Shingo Onodera, Blanc's original color scheme was blue, and was then changed to white. [4] As White Heart, she has long light blue hair in long sideburns, and a white suit. In that form, she is also quiet and inexpressive. [6] [10] Onodera gave Blanc a hobby of being an avid reader.
The Crab Nebula is a pulsar wind nebula associated with the 1054 supernova.. The known history of supernova observation goes back to 1006 AD. All earlier proposals for supernova observations are speculations with many alternatives.
U.S. President-elect Donald Trump's return to the White House next week threatens freedoms at home and abroad, the head of Human Rights Watch said on Thursday, warning that his second term could ...
Spin exchange optical pumping (SEOP) [3] is one of several hyperpolarization techniques discussed on this page. This technique specializes in creating hyperpolarized (HP) noble gases, such as 3 He, 129 Xe, and quadrupolar 131 Xe, 83 Kr, and 21 Ne. [4] Noble gases are required because SEOP is performed in the gas phase, they are chemically inert, non-reactive, chemically stable with respect to ...