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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.
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.
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.
At the beginning of the film, Murph believes she has a ghost who visits her bedroom, rattling the bookshelves that line her wall. In fact, Murph is the character who — throughout the entire film ...
In interstellar astronomy, visible spectra can appear redder due to scattering processes in a phenomenon referred to as interstellar reddening [50] —similarly Rayleigh scattering causes the atmospheric reddening of the Sun seen in the sunrise or sunset and causes the rest of the sky to have a blue color.
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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.
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.