Astronomers have discovered a star that was thrown out of our galaxy, the Milky Way galaxy, a supermassive black hole Sgr A * located in its center. This star, S5-HVS1, revolved around a black hole long enough to accelerate to an astonishing speed. But then centrifugal forces, plus, as scientists suspect, the gravitational impact from another large space object or cataclysm, allowed the S5-HVS1 star to escape from the black hole trap and rush beyond our galaxy.
Note that the S5-HVS1 star was first discovered in the Crane constellation region using the 3.9-meter Anglo-Australian Telescope, located near the city of Kunabarabrana, Australia. Further observations made with the Gaia space telescope showed that this star moves ten times faster than the other fastest stars expelled from our galaxy. Now this star is moving at a speed of 3.7 million miles per hour (5.95 million kilometers per hour).
Such a high speed of movement will allow the star S5-HVS1 to leave the limits of the Milky Way, where it is no longer destined to return. The first such “hyper-speed” star was discovered by astronomers only two decades ago, and from that moment only a few such cases were recorded.
According to the very first hypothesis put forward, hyperfast stars are obtained when a pair of coupled stars approaches a supermassive black hole. One of the stars is “eaten up” by a black hole, and the second, having received the energy and gravitational “kick”, rushes into space with great speed. Such a mechanism was once called the Hills Mechanism.
The case of the star S5-HVS1 is the first in the history of astronomy, when a clear connection is traced between the high speed of the star and the central region of our galaxy. Scientists believe that the star S5-HVS1 was ejected from the center of the galaxy about five million years ago and its speed at that time was tens of thousands of kilometers per second.