Outer space

Outer space, or simply space, is the void that exists between celestial bodies, including the Earth. It is not completely empty, but consists of a hard vacuum containing a low density of particles: predominantly a plasma of hydrogen and helium, as well as electromagnetic radiation, magnetic fields, and neutrinos. Observations and theory suggest that it also contains dark matter and dark energy. The baseline temperature, as set by the background r... More
top ↑

Similar topics in Freebase

  • Camelot

    Camelot

    Camelot is a castle and court associated with the legendary King Arthur. Absent in the early Arthurian material, Camelot first appeared in 12th-century French romances and eventually came to be described as the fantastic capital of Arthur's realm and a symbol of the Arthurian world. The stories...
  • Ireland

    Ireland

    Ireland (pronounced [ˈaɪrlənd] ( listen); Irish: Éire [ˈeːɾʲə] ( listen); Ulster Scots: Airlann or Airlan) is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth. To its east is the larger island of Great Britain, from...
  • Hawaii

    Hawaii

    Hawaii (/həˈwaɪ.iː/ or /həˈwaɪʔiː/; Hawaiian: Hawaiʻi Hawaiian pronunciation: [hɐˈvɐiʔi]) is the most recent of the 50 U.S. states (August 21, 1959), and is the only U.S. state made up entirely of islands. It is the northernmost island group in Polynesia, occupying most of an archipelago in the...
  • Europe

    Europe

    Europe (pronunciation: /ˈjʊərəp/ YEWR-əp or /ˈjɜrəp/ YUR-əp) is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the...
  • Celestia

  • Snap City

These people have edited this topic:

Edit this topic
Edit and Show details

Add or delete facts, download data in JSON or RDF formats, and explore topic metadata.

Freebase Logo
What is Freebase?

Freebase is a huge collection of facts, built by people like you. Freebase connects facts in ways other sites can't, giving you new ways to explore millions of subjects.
You can help improve it!