NGC 821 is an
elliptical galaxy in the
constellation Aries. It is estimated to be about 80 million
light-year
A light-year, alternatively spelled light year, is a large unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (), or 5.88 trillion miles ().One trillion here is taken to be 1012 ...
s from the
Milky Way[ and has a diameter of approximately 55,000 light years. NGC 821 was discovered on September 4, 1786, by astronomer ]Wilhelm Herschel
Frederick William Herschel (; german: Friedrich Wilhelm Herschel; 15 November 1738 – 25 August 1822) was a German-born British astronomer and composer. He frequently collaborated with his younger sister and fellow astronomer Caroline H ...
.
See also
* List of NGC objects (1–1000)
This is a list of NGC objects 1–1000 from the New General Catalogue (NGC). The astronomical catalogue is composed mainly of star clusters, nebulae, and galaxies. Other objects in the catalogue can be found in the other subpages of the list of NGC ...
References
External links
*
Elliptical galaxies
Aries (constellation)
0821
008160
{{Elliptical-galaxy-stub