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  2. Magnitude (astronomy) - Wikipedia

    en.wikipedia.org/wiki/Magnitude_(astronomy)

    An illustration of light sources from magnitude 1 to 3.5, in 0.5 increments. In astronomy, magnitude is a measure of the brightness of an object, usually in a defined passband. An imprecise but systematic determination of the magnitude of objects was introduced in ancient times by Hipparchus. Magnitude values do not have a unit.

  3. Apparent magnitude - Wikipedia

    en.wikipedia.org/wiki/Apparent_magnitude

    The absolute magnitude M, of a star or astronomical object is defined as the apparent magnitude it would have as seen from a distance of 10 parsecs (33 ly). The absolute magnitude of the Sun is 4.83 in the V band (visual), 4.68 in the Gaia satellite's G band (green) and 5.48 in the B band (blue).

  4. Star chart - Wikipedia

    en.wikipedia.org/wiki/Star_chart

    A celestial map by the Dutch cartographer Frederik de Wit, 1670. A star chart is a celestial map of the night sky with astronomical objects laid out on a grid system. They are used to identify and locate constellations, stars, nebulae, galaxies, and planets. [1]

  5. List of common astronomy symbols - Wikipedia

    en.wikipedia.org/wiki/List_of_common_astronomy...

    Printable version; In other projects ... This is a compilation of symbols commonly used in astronomy, particularly professional astronomy. ... - Absolute magnitude, ...

  6. Celestial cartography - Wikipedia

    en.wikipedia.org/wiki/Celestial_cartography

    4.6 Free and printable from files. 5 See also. ... is the aspect of astronomy and branch of cartography concerned with mapping ... (stars to magnitude 9 in main ...

  7. Category:Astronomical symbols templates - Wikipedia

    en.wikipedia.org/wiki/Category:Astronomical...

    [[Category:Astronomical symbols templates]] to the <includeonly> section at the bottom of that page. Otherwise, add <noinclude>[[Category:Astronomical symbols templates]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last character.

  8. List of brightest stars - Wikipedia

    en.wikipedia.org/wiki/List_of_brightest_stars

    For example, Betelgeuse has the K-band apparent magnitude of −4.05. [5] Some stars, like Betelgeuse and Antares, are variable stars, changing their magnitude over days, months or years. In the table, the range of variation is indicated with the symbol "var". Single magnitude values quoted for variable stars come from a variety of sources.

  9. Absolute magnitude - Wikipedia

    en.wikipedia.org/wiki/Absolute_magnitude

    Earth's albedo varies by a factor of 6, from 0.12 in the cloud-free case to 0.76 in the case of altostratus cloud. The absolute magnitude in the table corresponds to an albedo of 0.434. Due to the variability of the weather, Earth's apparent magnitude cannot be predicted as accurately as that of most other planets. [20]