NGC 721 is a barred spiral galaxy located in the constellation Andromeda about 250 million light years from the Milky Way. It was discovered by the Prussian astronomer Heinrich d'Arrest in 1862. [5] [6] [7]

ngc 721 是仙女座的一个星系。 维基共享资源上的相关多媒体资源：ngc 721. ned – ngc 721; seds – ngc 721; simbad – ngc 721; vizier – ngc 721

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NGC 721 is a barred spiral galaxy in the Andromeda constellation. It is about 256 million light-years away from the Milky Way.

NGC 721 is a Barred Spiral Galaxy located in the constellation of Andromeda in the northern hemisphere. NGC 721's distance from Earth is 222,882,222.26 light years. NGC 721 is called NGC 721 in the New General Catalogue (NGC). This catalogue is a list of deep space objects compiled by John Louis Emil Dreyer in 1888 to update John Herschel's ...

NGC 721 是仙女座的一个星系。

2022年2月2日 · NGC 721 -- Galaxy The astronomical object called NGC 721 is a Galaxy: Origin of the objects types : (Ref) Object type as listed in the reference "Ref" (acronym) Object type linked to the acronym according to the original reference Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular ...

NGC 721 is a Spiral Galaxy in the Andromeda constellation. NGC 721 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere. Given its B magnitude of 13.8, NGC 721 is visible with the help of a telescope having an aperture of 14 inches (350mm) or more.

NGC 721 是 仙女座 的一個 星系。

Media in category "NGC 721" The following 2 files are in this category, out of 2 total.