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The Milky Way [c] is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye.
Galactic year. The galactic year, also known as a cosmic year, is the duration of time required for the Sun to orbit once around the center of the Milky Way Galaxy. [1] One galactic year is approximately 225 million Earth years. [2] The Solar System is traveling at an average speed of 230 km/s (828,000 km/h) or 143 mi/s (514,000 mph) within its ...
Group of at least 80 galaxies of which the Milky Way is a part. Dominated by Andromeda (the largest), the Milky Way and Triangulum; the remainder are dwarf galaxies. Local Sheet: 7 Mpc 2.16×10 20: 20.33: Group of galaxies including the Local Group moving at the same relative velocity towards the Virgo Cluster and away from the Local Void.
Galactic Center. 17 45 40.04, −29° 00′ 28.1″. The Galactic Center, as seen by one of the 2MASS infrared telescopes, is located in the bright upper left portion of the image. Marked location of the Galactic Center. The Galactic Center is the barycenter of the Milky Way and a corresponding point on the rotational axis of the galaxy.
The Japanese name for the Milky Way is the "River of Heaven" (天の川), as well as an alternative name in Chinese (Chinese: 天河; pinyin: Tiān hé). Straw Way [ edit ] In West Asia, Central Asia and parts of the Balkans the name for the Milky Way is related to the word for straw .
The Empire is spread across the Milky Way galaxy and consists of almost 25 million planets settled exclusively by humans. For over 12 millennia the seat of imperial authority was located on the ecumenopolis of Trantor , whose population exceeded 40 billion, [3] until it was sacked in the year 12,328.
The Milky Way and Andromeda galaxies each contain a central supermassive black hole (SMBH), these being Sagittarius A* (c. 3.6 × 10 6 M ☉) and an object within the P2 concentration of Andromeda's nucleus (1–2 × 10 8 M ☉).
12 Mly (3.6 Mpc) 19h 16m 41s An irregular galaxy in the constellation Draco. It was discovered by Lewis Swift on 30 August 1883. It is located within the Local Void, a region of space with far fewer galaxies than its surroundings. It is the nearest blue compact dwarf (BCD) galaxy to the Milky Way. It is chemically homogeneous and relatively ...