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A star is a massive luminous spheroid astronomical object made of plasma that is held together by its own gravity.Stars exhibit great diversity in their properties (such as mass, volume, velocity, stage in stellar evolution, and distance from Earth) and some of the outliers are so disproportionate in comparison with the general population that they are considered extreme.
Kepler's heliocentric rendition of the cosmos, containing an outermost "sphaera stellar fixar," or sphere of fixed stars. In astronomy , the fixed stars ( Latin : stellae fixae ) are the luminary points, mainly stars , that appear not to move relative to one another against the darkness of the night sky in the background.
An illustration of the constellation Perseus (after Perseus from Greek mythology) from the star atlas published by the Polish astronomer Johannes Hevelius in 1690. A star catalogue is an astronomical catalogue that lists stars.
The known 131 objects are bound in 94 stellar systems. Of those, 103 are main sequence stars : 80 red dwarfs and 23 "typical" stars having greater mass. 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 ).
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]
Sirius is the brightest star in the night sky. With a visual apparent magnitude of −1.46, it is almost twice as bright as Canopus, the next brightest star.The name "Sirius" is derived from the Ancient Greek Seirios ("scorcher"), possibly because the star's appearance was associated with summer.
Price drop! Get this stellar cordless vac for $110 — it's over 70% off for Memorial Day. Derek Arbogast. May 23, 2023 at 10:50 AM. We are soaking up all the spring sunshine we can — but those ...
The night sky is the nighttime appearance of celestial objects like stars, planets, and the Moon, which are visible in a clear sky between sunset and sunrise, when the Sun is below the horizon. Natural light sources in a night sky include moonlight , starlight , and airglow , depending on location and timing.