A black hole is a geometrically defined region of spacetime exhibiting such strong gravitational effects that nothing—including particles and electromagnetic ...
An artist's drawing shows the current view of the Milky Way galaxy. Scientific
evidence shows that in the middle of the Milky Way is a supermassive
Apr 9, 2015
Astronomy. a theoretical massive object, formed at the beginning of the universe or by the gravitational collapse of a star exploding as a supernova, whose ...
an invisible area in outer space with gravity so strong that light cannot get out of it . Take a 2-minute break to test your vocabulary. » ...
A massive star in the last phase of its evolution, in which the star collapses, creating a volume of space-time with a gravitational field so intense that its escape ...
The term '