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  2. Arcturus: Facts about the bright red giant star

    • Arcturus can be found around 37 light-years away from Earth and is the 4th brightest star in the night sky. The easiest way to spot Arcturus is by following the curve of the "handle" of the Big Dipper . A si… See more

    Chicago World's Fair

    Organizers for the Chicago World's Fair in 1933 were searching for a memorable way to open their exhibit. The previous world's fair in the city had occurred 40 years earlier, in 1… See more

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    Modern Understanding of Arcturus

    Today, astronomers know that Arcturus packs a lot of punch despite being only about 1.5 … See more

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    Arcturus in Fiction

    No planets have been found surrounding this star, although science fiction has explored that subject. One early example is David Lindsay's book "A Voyage to Arcturus" (… See more

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    Additional Resources

    To find out more about constellations and stars, head to the International Astronomical Union. Check out "Constellations: The Story of Space Told Through th… See more

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  1. Arcturus is a red giant star in the Northern Hemisphere of Earth 's sky and the brightest star in the constellation Boötes (the herdsman). Arcturus is also among the brightest stars that can be seen from Earth. Astronomers say Arcturus will end up as a white dwarf at the end of its life.
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  2. Arcturus - Wikipedia

    Located relatively close at 36.7 light-years from the Sun, Arcturus is a red giant of spectral type K1.5III—an aging star around 7.1 billion years old that has used up its core hydrogen and evolved off the main sequence.

  3. Arcturus (α Boo): Star Type, Size, Name, Constellation - Star Facts

  4. 7 Facts About Arcturus, the Red Giant Star | HowStuffWorks

  5. Arcturus: The Mysteries of the Red Giant Star - The Old …

    Jun 28, 2024 · Arcturus is the brightest star in the northern sky, easily visible without a star chart. This brilliant orange-red star, found in the constellation Boötes (boh-OH-teez) the Herdsman, is around 36.7 light-years from Earth. …

  6. Arcturus Star – Facts About The 4th Brightest Star

    Arcturus is an orange giant star of the spectral type K0 III and is the brightest class K giant in the sky, with an absolute magnitude of about -0.30. It has around the same mass as the Sun, only 1.08 times the mass, yet is 25.4 times its size.

  7. Arcturus | Brightest Star, Red Giant, Constellation Bootes | Britannica

  8. Arcturus (α Boötis) | Facts, Information, History

    Jan 20, 2020 · Arcturus is the brightest star in the constellation of Boötes. It is the fourth-brightest star in the night sky, yet the brightest in the northern celestial hemisphere. Arcturus, together with Spica and Denebola (Regulus) – is part of …

  9. What Is Arcturus? | History, Types, Distance & Traits

    Arcturus, a beacon in the night sky, stands as one of the most prominent stars visible from the northern hemisphere. Its brilliance captivates astronomers and stargazers alike, holding a significant place in the annals of astronomy. But …

  10. Arcturus Star | Pictures, Location, and the Origin of its …

    Arcturus, also known as Alpha Boötis, is one of the brightest stars in the northern hemisphere. In fact, it is the third brightest individual star in the entire night sky behind Sirius and Canopus. At times, it is referred to as the fourth brightest …