this is due to the gravity of the black holes.
2. The black holes are basically a region of space with gravitational field so strong that nothing (including light) can pass from it.
3. An astronaut wouldbe stretched on its way to the black hole. This is because the black hole's extreme gravity would be pulling her feet towards itself and the astronaut would be stretched !!!
4. It is now thought that most galaxies are held together by supermassive black holes at their centers, which cluster hundreds of solar systems around them.
5. All the matter in the universe will not end up in black holes. Most stars in the universe don’t have enough mass to become black holes at the end of their lives.
