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  2. Kemlo - Wikipedia

    en.wikipedia.org/wiki/Kemlo

    The Kemlo books are a series of children's science fiction novels written by Reginald Alec Martin, under the pseudonym of E. C. Eliott. [1] The first book, Kemlo and the Crazy Planet was published in 1954; the fifteenth and final book in the series, Kemlo and the Masters of Space, was published in 1963.

  3. Delta-v - Wikipedia

    en.wikipedia.org/wiki/Delta-v

    Delta-v (also known as "change in velocity"), symbolized as and pronounced /dɛltə viː/, as used in spacecraft flight dynamics, is a measure of the impulse per unit of spacecraft mass that is needed to perform a maneuver such as launching from or landing on a planet or moon, or an in-space orbital maneuver.

  4. Brave New Words - Wikipedia

    en.wikipedia.org/wiki/Brave_New_Words

    The vocabulary includes words used in science fiction books, TV and film. A second category rises from discussion and criticism of science fiction, and a third category comes from the subculture of fandom. It describes itself as "the first historical dictionary devoted to science fiction", tracing how science fiction terms have developed over time.

  5. Time dilation - Wikipedia

    en.wikipedia.org/wiki/Time_dilation

    Velocity and gravitational time dilation have been the subject of science fiction works in a variety of media. Some examples in film are the movies Interstellar and Planet of the Apes . [ 43 ] In Interstellar , a key plot point involves a planet, which is close to a rotating black hole and on the surface of which one hour is equivalent to seven ...

  6. Newton's laws of motion - Wikipedia

    en.wikipedia.org/wiki/Newton's_laws_of_motion

    Here, the Greek letter is used, per tradition, to mean "change in". A positive average velocity means that the position coordinate increases over the interval in question, a negative average velocity indicates a net decrease over that interval, and an average velocity of zero means that the body ends the time interval in the same place as it began.

  7. Science fiction - Wikipedia

    en.wikipedia.org/wiki/Science_fiction

    American science fiction author and editor Lester del Rey wrote, "Even the devoted aficionado or fan—has a hard time trying to explain what science fiction is," and the lack of a "full satisfactory definition" is because "there are no easily delineated limits to science fiction." [3] Another definition comes from The Literature Book by DK and ...

  8. Dynamical friction - Wikipedia

    en.wikipedia.org/wiki/Dynamical_friction

    The full Chandrasekhar dynamical friction formula for the change in velocity of the object involves integrating over the phase ... is the velocity of the object ...

  9. Tunnel in the Sky - Wikipedia

    en.wikipedia.org/wiki/Tunnel_in_the_Sky

    Tunnel in the Sky is a juvenile science fiction novel by American writer Robert A. Heinlein, published in 1955 by Scribner's as one of the Heinlein juveniles.The story describes a group of students sent on a survival test to an uninhabited planet, who soon realise they are stranded there.