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The Virgo Supercluster, often just called the Local Supercluster
Until now, the Milky Way was believed to be one galaxy in the 2,000 that make up what's known as the Virgo "supercluster".
The Milky Way is part of the Virgo Supercluster.
Virgo Supercluster
The Virgo Supercluster (in which the Milky Way is located) is about 200 million light years across.
The Milky Way is part of the Local Group, which is part of the Virgo Supercluster.
The Solar System contains the Earth-Moon system. The Milky Way galaxy contains the Solar System. The Virgo supercluster contains the Milky Way galaxy. The Universe contains the Virgo supercluster.
The Earth is 93,000,000 miles from the Sun, on the edge of the Milky Way galaxy, in the Virgo supercluster.
In 1918 he used Cepheid variables to estimate the size of the Milky Way. The Shapley Supercluster of galaxies is named after him as well.
The Milky Way is approximately 100,000 light years across. The value may differ according to sources because the Milky Way does not have a defining boundary.
There is no larger rotational group for galaxies. The Milky Way galaxy and the Andromeda Galaxy, as part of the Local Group, are moving generally in one direction, toward an unidentified central mass in the direction of the constellation Centaurus. (This may be a gravitational effect of the Shapley Supercluster.)
The Milky Way is located in the Local Clusterwhich contains about 30 galaxies. It is on of the biggest of them and it also has a twin galaxy called Andromeda. The local cluster is located a galaxy cloud called Canes Venaticiwhich together with 6 other galaxy clouds makes the Local Supercluster.