كوكب أسود

الكوكب الأسود blanet هو عضو في صف افتراضي من الكواكب الخارجية التي تدور مباشرةً حول ثقب أسود.[1]

Blanets are fundamentally similar to planets; they have enough mass to be rounded by their own gravity, but are not massive enough to start thermonuclear fusion, just like planets that orbit stars. In 2019, a team of astronomers and exoplanetologists showed that there is a safe zone around a supermassive black hole that could harbor thousands of blanets in orbit around it.[2][3]

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

أصل التسمية

The team led by Keiichi Wada of Kagoshima University in Japan has given this name to black hole planets.[4] The word is a portmanteau of black hole and planet.


التشكل

Blanets are suspected to form in the accretion disk that orbits a sufficiently large black hole.[3][5]

في الخيال

In Interstellar (2014), two of the 3 terrestrial planets orbiting supermassive black hole Garguantua are proper blanets. The other one orbits a Main-sequence star named Pantagruel.

المراجع

  1. ^ Letzter, R. (6 August 2020). "Thousands of Earthlike 'blanets' might circle the Milky Way's central black hole". Space.com. Retrieved 2020-08-08.
  2. ^ Wada, K.; Tsukamoto, Y.; Kokubo, E. (26 November 2019). "Planet Formation around Supermassive Black Holes in the Active Galactic Nuclei". The Astrophysical Journal. 886 (2): 107. arXiv:1909.06748. Bibcode:2019ApJ...886..107W. doi:10.3847/1538-4357/ab4cf0.
  3. ^ أ ب Wada, K.; Tsukamoto, Y.; Kokubo, E. (2021). "Formation of "Blanets" from Dust Grains around the Supermassive Black Holes in Galaxies". The Astrophysical Journal. 909 (1): 96. arXiv:2007.15198. Bibcode:2021ApJ...909...96W. doi:10.3847/1538-4357/abd40a. S2CID 220870610.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  4. ^ Starr, M. (3 August 2020). "We Have Ploonets. We Have Moonmoons. Now Hold Onto Your Hats For... Blanets". ScienceAlert. Retrieved 2020-08-08.
  5. ^ Greene, T. (2020-08-04). "Scientists: What if black holes had a safe zone where little planets could live? Let's call them 'blanets'". The Next Web. Retrieved 2020-08-08.