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  2. Beta Cancri - Wikipedia

    en.wikipedia.org/wiki/Beta_Cancri

    Beta Cancri (β Cancri, abbreviated Beta Cnc, β Cnc), also named Tarf / ˈtɑːrf /, [10] is the brightest star in the zodiacal constellation of Cancer. It has an apparent visual magnitude of +3.5 [2] and an absolute magnitude of −1.2. [6] Based on parallax measurements obtained during the Hipparcos mission, it is approximately 290 light ...

  3. IAU designated constellations - Wikipedia

    en.wikipedia.org/wiki/IAU_designated_constellations

    IAU designated constellations. In contemporary astronomy, 88 constellations are recognized by the International Astronomical Union (IAU). [1] Each constellation is a region of the sky bordered by arcs of right ascension and declination, together covering the entire celestial sphere. Their boundaries were officially adopted by the International ...

  4. Star - Wikipedia

    en.wikipedia.org/wiki/Star

    A star-forming region in the Large Magellanic Cloud. A star is a luminous spheroid of plasma held together by self-gravity. [1] The nearest star to Earth is the Sun. Many other stars are visible to the naked eye at night; their immense distances from Earth make them appear as fixed points of light.

  5. Constellation - Wikipedia

    en.wikipedia.org/wiki/Constellation

    A constellation is an area on the celestial sphere in which a group of visible stars forms a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object. [1] The first constellations likely go back to prehistory. People used them to relate stories of their beliefs, experiences, creation, and mythology.

  6. Stellar designations and names - Wikipedia

    en.wikipedia.org/wiki/Stellar_designations_and_names

    The Bright Star Catalogue, which is a star catalogue listing all stars of apparent magnitude 6.5 or brighter, or roughly every star visible to the naked eye from Earth, contains 9,096 stars. [1] The most voluminous modern catalogues list on the order of a billion stars, out of an estimated total of 200 to 400 billion in the Milky Way .

  7. Stellar classification - Wikipedia

    en.wikipedia.org/wiki/Stellar_classification

    In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colors interspersed with spectral lines. Each line indicates a particular chemical element ...

  8. List of stars for navigation - Wikipedia

    en.wikipedia.org/wiki/List_of_stars_for_navigation

    Equatorial stars. The equatorial region of the celestial sphere's eastern hemisphere includes 17 navigational stars from Alpheratz in the constellation Andromeda to Denebola in Leo. It also includes stars from the constellations Cetus, Aries, Taurus, Orion, Canis Major and Minor, Gemini, and Hydra.

  9. List of nearest stars - Wikipedia

    en.wikipedia.org/wiki/List_of_nearest_stars

    Additionally, astronomers have found 6 white dwarfs (stars that have exhausted all fusible hydrogen), 21 brown dwarfs, as well as 1 sub-brown dwarf, WISE 0855−0714 (possibly a rogue planet). The closest system is Alpha Centauri, with Proxima Centauri as the closest star in that system, at 4.2465 light-years from Earth.