New research has focused on the role of dark matter in the galaxy.
Astrophysicists from Canada presented the most accurate to date estimate of the mass of the milky Way. The study is published in the Astrophysical Journal.
Galaxy together with the stars, black holes, cosmic dust and dark matter the mass of the Sun (which is about 333 thousand times the mass of the Earth) is 700 billion times, and dark matter accounts for about 88 percent of the mass of the milky Way.
New research has focused on the role of dark matter in the galaxy and account for the entire gravitational mass of a star cluster, which in diameter is 100-120 thousand light years.
Previously, scientists believed that the milky Way is heavier than the Sun a trillion times. A new study has shown that the galaxy is lighter by 300 billion solar masses. Scientists continue to Refine the mass of a star cluster.
Spiral galaxy milky Way, contains in the centre a supermassive black hole Sagittarius A*. The largest of its companion is a dwarf galaxy SagDEG. In four billion years the milky Way will merge with Andromeda.
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