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  1. earthsky.org › astronomy-essentials › which-spiral-arm-of-theWhich Milky Way spiral arm is ours? - EarthSky

    Vor 3 Tagen · According to the best current knowledge, the Milky Way is about 100,000 light-years across, about 2,000 light-years deep, and has 100 to 400 billion stars. Astronomers once thought that our...

    • Orion the Hunter

      Orion the Hunter – a very noticeable constellation – rises...

    • Rigel

      According to stellar evolution theory, it is a massive star...

  2. en.wikipedia.org › wiki › Habitable_zoneHabitable zone - Wikipedia

    Vor 3 Tagen · In astronomy and astrobiology, the habitable zone ( HZ ), or more precisely the circumstellar habitable zone ( CHZ ), is the range of orbits around a star within which a planetary surface can support liquid water given sufficient atmospheric pressure.

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  4. www.abc.net.au › listen › programsNaomi and the smudge of luminous stars - ABC listen

    Vor 2 Tagen · 00:00. 00:00. Naomi McClure-Griffiths is an astrophysicist who made a massive discovery when she was making an atlas of our galaxy. (Supplied: ANU) The Milky Way has many different names all ...

  5. en.wikipedia.org › wiki › SunSun - Wikipedia

    Vor 2 Tagen · It is a massive, hot ball of plasma, inflated and heated by energy produced by nuclear fusion reactions at its core. Part of this energy is emitted from its surface as visible light, ultraviolet, and infrared radiation, providing most of the energy for life on Earth. The Sun has been an object of veneration in many cultures.

    • ≈4.6 billion years (4.6×10⁹ years)
    • Solar (/ˈsoʊlər/)
    • −26.74
    • 1.9885×10³⁰ kg, 332,950 Earths

  6. www.britannica.com › science › Drake-equationDrake equation | Searching for ET, SETI, Habitable Planets

    Vor 5 Tagen · Drake equation, equation that purports to yield the number N of technically advanced civilizations in the Milky Way Galaxy as a function of other astronomical, biological, and psychological factors. (Read Carl Sagan’s Britannica entry on extraterrestrial life.) Formulated in large part by the U.S.

    • The Editors of Encyclopaedia Britannica

  7. www.yahoo.com › news › milky-way-3-intruder-stars-130007133In the Milky Way, 3 intruder stars are 'on the run' — in the...

    Vor einem Tag · There are around 400 billion stars in the Milky Way, and Frebel and colleagues will now search for more SASS stars among them. They'll do this by looking for metal-poor stellar compositions, then ...

  8. knowridge.com › 2024 › 05Scientists discover giant magnetic rings in the Milky Way's halo

    Vor 3 Tagen · Magnetic fields in the halo of the Milky Way have a toroidal structure, extending in the radius range of 6,000 light-years to 50,000 light-years from the galaxy center. The sun is at about 30,000 ...