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  2. Outer space - Wikipedia

    en.wikipedia.org/wiki/Outer_space

    Deep space is defined by the United States government as all of outer space which lies further from Earth than a typical low-Earth-orbit, thus assigning the Moon to deep-space. [117] Other definitions vary the starting point of deep-space from, "That which lies beyond the orbit of the moon," to "That which lies beyond the farthest reaches of ...

  3. BBC Bitesize - Wikipedia

    en.wikipedia.org/wiki/BBC_Bitesize

    GCSE Bitesize was launched in January 1998, covering seven subjects. For each subject, a one- or two-hour long TV programme would be broadcast overnight in the BBC Learning Zone block, and supporting material was available in books and on the BBC website. At the time, only around 9% of UK households had access to the internet at home.

  4. Solar System - Wikipedia

    en.wikipedia.org/wiki/Solar_System

    The Solar System remains in a relatively stable, slowly evolving state by following isolated, gravitationally bound orbits around the Sun. [28] Although the Solar System has been fairly stable for billions of years, it is technically chaotic, and may eventually be disrupted. There is a small chance that another star will pass through the Solar ...

  5. Space - Wikipedia

    en.wikipedia.org/wiki/Space

    Debates concerning the nature, essence and the mode of existence of space date back to antiquity; namely, to treatises like the Timaeus of Plato, or Socrates in his reflections on what the Greeks called khôra (i.e. "space"), or in the Physics of Aristotle (Book IV, Delta) in the definition of topos (i.e. place), or in the later "geometrical conception of place" as "space qua extension" in the ...

  6. Solar System (TV series) - Wikipedia

    en.wikipedia.org/wiki/Solar_System_(TV_series)

    Solar System is a 2024 documentary TV mini series produced by the BBC and narrated by Brian Cox. The first episode was shown on BBC Two on 7 October 2024, [1] with the remaining four episodes made available on BBC iPlayer on the same date. [2] It follows Cox's previous series Wonders of the Solar System, shown in 2010, and The Planets, shown

  7. Vacuum - Wikipedia

    en.wikipedia.org/wiki/Vacuum

    Outer space is an even higher-quality vacuum, with the equivalent of just a few hydrogen atoms per cubic meter on average in intergalactic space. [ 5 ] Vacuum has been a frequent topic of philosophical debate since ancient Greek times, but was not studied empirically until the 17th century.

  8. International Space Station - Wikipedia

    en.wikipedia.org/wiki/International_Space_Station

    This is an accepted version of this page This is the latest accepted revision, reviewed on 19 December 2024. Inhabited space station in low Earth orbit (1998–present) "ISS" redirects here. For other uses, see ISS (disambiguation). International Space Station (ISS) Oblique underside view in November 2021 International Space Station programme emblem with flags of the original signatory states ...

  9. Energy - Wikipedia

    en.wikipedia.org/wiki/Energy

    Other energy units such as the electronvolt, food calorie or thermodynamic kcal (based on the temperature change of water in a heating process), and BTU are used in specific areas of science and commerce. In 1843, English physicist James Prescott Joule, namesake of the unit of measure, discovered that the gravitational potential energy lost by ...