They are called "black holes".
Dead stars are not necessarily black holes. Dead stars can become white dwarfs, neutron stars, or black holes depending on their mass. Only the most massive dead stars can collapse further to become black holes if they exceed the Chandrasekhar limit, around 1.4 times the mass of the Sun.
The most massive stars become black holes.
False. Only the most massive stars will become black holes.
No. They do not have enough mass to become black holes. Depending on the mass they will either become white dwarfs or neutron stars.
Black holes
Only stars that are much more massive than our sun can become a black hole. When the star dies, it explodes (called a supernova) and then gravitational collapse helps it to form a black hole.
Not all stars do but stars can turn into black holes. Small ones turn in to a black dwarf star when it dies. Medium ones turn in to a neutron then in to a red giant star and then to white dwarf star Large size stars becomes a blackhole..........
False. Medium-sized stars become white dwarfs. Only the most massive stars form black holes.
The difference is in mass. Low to medium mass stars (up to about 8-10 solar masses) become white dwarfs. Massive stars (10 to 25 solar masses) become neutron stars. Stars above 25 solar masses tend to become black holes.
The most massive stars will die as black holes.
High-mass stars might become black holes, if the remaining matter (after the supernova explosion) is sufficiently large.
Not really "a" black hole - many black holes. It is currently believed that all, or most, galaxies have a huge black hole at its center. Any galaxy should also have lots of smaller black holes - so-called "stellar" black holes, because they have approximately the mass of a star (larger stars can become black holes).