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  2. Cosmos: A Spacetime Odyssey - Wikipedia

    en.wikipedia.org/wiki/Cosmos:_A_Spacetime_Odyssey

    Cosmos: Possible Worlds (2020) Cosmos: A Spacetime Odyssey is a 2014 American science documentary television series. [2] The show is a follow-up to the 1980 television series Cosmos: A Personal Voyage, which was presented by Carl Sagan on the Public Broadcasting Service and is considered a milestone for scientific documentaries.

  3. 2010: Odyssey Two - Wikipedia

    en.wikipedia.org/wiki/2010:_Odyssey_Two

    2010: Odyssey Two is a 1982 science fiction novel by British writer Arthur C. Clarke. It is the sequel to his 1968 novel 2001: A Space Odyssey, though Clarke changed some elements of the story to align with the film version of 2001. Set in the year 2010, the plot centres on a joint Soviet-US mission aboard the Soviet spacecraft The Cosmonaut ...

  4. Binary star - Wikipedia

    en.wikipedia.org/wiki/Binary_star

    Binary star. The well-known binary star Sirius, seen here in a Hubble photograph from 2005, with Sirius A in the center, and white dwarf, Sirius B, to the left bottom from it. A binary star or binary star system is a system of two stars that are gravitationally bound to and in orbit around each other. Binary stars in the night sky that are seen ...

  5. Binary system - Wikipedia

    en.wikipedia.org/wiki/Binary_system

    A binary system is a system of two astronomical bodies of the same kind that are comparable in size. Definitions vary, but typically require the center of mass to be located outside of either object. (See animated examples.) The most common kinds of binary system are binary stars and binary asteroids, but brown dwarfs, planets, neutron stars ...

  6. Binary black hole - Wikipedia

    en.wikipedia.org/wiki/Binary_black_hole

    A binary black hole (BBH), or black hole binary, is a system consisting of two black holes in close orbit around each other. Like black holes themselves, binary black holes are often divided into binary stellar black holes, formed either as remnants of high-mass binary star systems or by dynamic processes and mutual capture; and binary ...

  7. Nemesis (hypothetical star) - Wikipedia

    en.wikipedia.org/wiki/Nemesis_(hypothetical_star)

    Nemesis (hypothetical star) Nemesis is a hypothetical red dwarf [1] or brown dwarf, [2] originally postulated in 1984 [3] to be orbiting the Sun at a distance of about 95,000 AU (1.5 light-years), [2] somewhat beyond the Oort cloud, to explain a perceived cycle of mass extinctions in the geological record, which seem to occur more often at ...

  8. HAL 9000 - Wikipedia

    en.wikipedia.org/wiki/HAL_9000

    HAL 9000 (or simply HAL or Hal) is a fictional artificial intelligence character and the main antagonist in Arthur C. Clarke's Space Odyssey series. First appearing in the 1968 film 2001: A Space Odyssey, HAL (Heuristically Programmed Algorithmic Computer) is a sentient artificial general intelligence computer that controls the systems of the Discovery One spacecraft and interacts with the ...

  9. Double planet - Wikipedia

    en.wikipedia.org/wiki/Double_planet

    Double planet. In astronomy, a double planet (also binary planet) is a binary satellite system where both objects are planets, or planetary-mass objects, and whose joint barycenter is external to both planetary bodies. Although up to a third of the star systems in the Milky Way are binary, [1] double planets are expected to be much rarer given ...