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  2. 20 Cool Facts About Space We Bet You Didn’t Know

    www.aol.com/20-cool-facts-space-bet-210041339.html

    The post 20 Cool Facts About Space We Bet You Didn’t Know appeared first on Reader's Digest. Who knows, one day you might be able to actually visit! The post 20 Cool Facts About Space We Bet You ...

  3. 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. [118] 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 ...

  4. Universe - Wikipedia

    en.wikipedia.org/wiki/Universe

    The cosmological constant represents the energy density of the vacuum of space and could be related to dark energy. [98] The equation describing how R varies with time is known as the Friedmann equation after its inventor, Alexander Friedmann. [154] The solutions for R(t) depend on k and Λ, but some qualitative features of such solutions are ...

  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. Fascinating recent discoveries about comets and meteors in ...

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    As space objects go, comets and meteors are not very big. While a planet like Earth is about 8,000 miles in diameter and a star like our Sun is about 865,000 miles across, the largest asteroid ...

  7. TIL: There is a figure known as the "unluckiest man in Pompeii". In 2018, archaeologists uncovered his skeleton and a rock where his head should've been, he got struck by the rock and his skull ...

  8. Space exploration - Wikipedia

    en.wikipedia.org/wiki/Space_exploration

    While the observation of objects in space, known as astronomy, predates reliable recorded history, it was the development of large and relatively efficient rockets during the mid-twentieth century that allowed physical space exploration to become a reality. Common rationales for exploring space include advancing scientific research, national ...

  9. The US's biggest moments and upsets in space this year - AOL

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    Here are the US's biggest moments in space this year and the missions that didn't go so well. This was a big year for space in the US with many historic firsts . SpaceX caught a rocket in mid-air.