Suppose each of the following objects could collapse into a black hole. Each black hole would have a sphere around it that is the limit for escape -- once you are inside this region, you cannot get away. An entire galaxy of stars would be this region that will be largest in diameter.
Strong magnetic field surrounding a black hole. A black hole is a very dense object whose gravity is so powerful that nothing can escape from it, not even light. The smallest speed at which anything needs move in order to escape the gravitational field of an object is known as the "escape velocity" for every object in space.
Most black holes are created from the remains of massive stars that explode in supernovae. Smaller stars eventually develop into dense neutron stars, which lack the mass necessary to confine light.
The discovery, which is slightly under 1,600 light-years away, raises the possibility that binary systems contain a substantial number of dormant black holes. The closest black hole to Earth so far has been identified as Gaia BH1, which may be seen in this artist's conception close to its Sun-like partner star.
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