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The brightest, most massive and most luminous object among those 131 is Sirius A, which is also the brightest star in Earth's night sky; its white dwarf companion Sirius B is the hottest object among them. The largest object within the 20 light-years is Procyon.
Coordinate systems in astronomy can specify an object's relative position in three-dimensional space or plot merely by its direction on a celestial sphere, if the object's distance is unknown or trivial. Spherical coordinates, projected on the celestial sphere, are analogous to the geographic coordinate system used on the surface of Earth.
The star Chi Virginis has one of the most massive planets ever detected, with a mass of 11.1 times that of Jupiter. The sun-like star 61 Virginis has three known planets: one is a super-Earth and two are Neptune-mass planets. SS Virginis is a variable star with a noticeable red color. It varies in magnitude from a minimum of 9.6 to a maximum of ...
According to the Farmers' Almanac, there have been several celestial events that have been referred to as the Christmas Star. In 2020, Jupiter and Saturn were so close together they looked like ...
Green comet images show progress across sky over a fortnight ... Fortunately for those unable to witness Comet C/2022 E3 ZTF in the night sky, the Virtual Telescope Project will be hosting a live ...
Its position in the Northern Celestial Hemisphere means that the whole constellation is visible to observers north of 12°S. [11] [c] High in the northern sky, it is circumpolar (that is, it never sets in the night sky) to viewers in the British Isles, Canada and the northern United States. [14]
Sirius is the brightest star in the night sky.Its name is derived from the Greek word Σείριος (Latin script: Seirios), meaning lit. 'glowing' or 'scorching'. The star is designated α Canis Majoris, Latinized to Alpha Canis Majoris, and abbreviated α CMa or Alpha CMa.
Arcturus is the brightest star in the northern constellation of Boötes.With an apparent visual magnitude of −0.05, [2] it is the fourth-brightest star in the night sky, and the brightest in the northern celestial hemisphere.