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Interstellar reddening is a phenomenon associated with interstellar extinction where the spectrum of electromagnetic radiation from a radiation source changes characteristics from that which the object originally emitted. Reddening occurs due to the light scattering off dust and other matter in the interstellar medium.
HD 300933 (CPD-56°3586) is a red supergiant of spectral type M2 Iab/Ib [3] in the southern constellation of Vela, close to the border with Carina.With an apparent magnitude of 8.29, it is too faint to be observed by the naked eye, but can be seen through binoculars.
An eagle-eyed TikToker found a clue in sci-fi epic Interstellar that changes the meaning of the entire movie.. Directed by Oscar-winner Christopher Nolan, the movie explores themes as diverse as ...
A comparison of this value with the apparent magnitude allows the approximate distance to be determined, after correcting for interstellar extinction of the luminosity because of gas and dust. In a gravitationally-bound star cluster such as the Hyades , the stars formed at approximately the same age and lie at the same distance.
2I/Borisov comet, the second confirmed interstellar object, photographed in late-2019 beside a distant galaxy. An interstellar object is an astronomical object (such as an asteroid, a comet, or a rogue planet, but not a star or stellar remnant) in interstellar space that is not gravitationally bound to a star.
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The distance of a star follows immediately from the knowledge of both absolute and apparent magnitude, provided that the interstellar reddening of the star is either negligible or well known.
The interstellar extinction of this star is fairly small at 0.05 magnitudes. [11] The projected rotational velocity of the equator is 185 km/s. [ 8 ] It is over four times the radius of the Sun and has a surface temperature of 12,800 K. [ 6 ] [ 7 ]