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What is a massive collapsed star?
A massive collapsed star is a dead star.
What is a star called that has collapsed under gravity and is made of neutrons?
A star that has collapsed under gravity and is made of neutrons is called a neutron star. Neutron stars are extremely dense and have a strong gravitational pull due to the collapsed core of a massive star. They are the remnants of supernova explosions.
A star that has collapsed under gravity?
A collapsed star is typically referred to as a black hole. Black holes form when massive stars run out of fuel and collapse under gravity, creating a region of spacetime with such intense gravitational pull that nothing, not even light, can escape from it.
A massive collapsed star that has such enormous gravity that nothing - not even light -can escape?
That's typically referred to as a "black hole", especially in the popular literature. You probably suspected that, or else it was an incredible coincidence, when you decided to deposit this question in the WikiAnswers category titled "Black Holes".
Is a black hole a solid collapsed star or a empty gravity field?
It contains the entire collapsed star, however the star has collapsed to an infinitesimal point (or infinitesimally thin ring if its spinning) singularity, leaving everything around that totally empty except for warped spacetime (which is what causes gravity).
What do a neutron star and black hole have in common?
Both are the collapsed remnants of massive stars.
What is a dense collapsed core with a very strong gravitional pull that forms when a very massive star become a supernova?
Neutron Star
What prevents a pulsar from gravitational contractions?
EVERY star - every object in the universe, actually - is in a balance between its internal pressure trying to cause it to expand, and the mutual attraction of its own gravity. Planets of every size, and stars of every size, they all exist in this balance. A pulsar got this way because the original star exploded and CRUSHED the core of the star into "collapsed matter", where all the protons, neutrons and electrons are merged together, without the massive space that normally separates these particles. Only the enormous gravity of the star could keep it collapsed that way, and it can't collapse any further because of nuclear pressure. If a lot more mass were added - for example, if two pulsars were to collide and merge - then the added gravity MIGHT cause them to continue to collapse - into a black hole. Some people ask "How much would a cubic centimeter of neutron star material weigh on Earth?", but the question is meaningless; you cannot take the collapsed matter away from the gravity source that keeps it collapsed, and if you could, it would re-expand into normal matter. Probably explosively.
What is a star that has collapsed after using its fuel?
A collapsed star after using up its fuel is called a white dwarf, neutron star, or black hole, depending on its mass. White dwarfs are remnants of low to medium mass stars, neutron stars are remnants of massive stars, and black holes are formed when very massive stars collapse.
What is the remains of a massive star pulled into a small volume by gravity?
A black hole
What difference of a star and a planet?
A star is a luminous ball of plasma held together by its own gravity and produce energy through thermonuclear fusion. A planet is a body orbiting a star massive enough to be rounded by its own gravity but not massive enough to conduct fusion.
What type of star is large and compact?
A large, compact star is typically a white dwarf, neutron star, or black hole. White dwarfs are the remnants of low to medium mass stars, neutron stars are the ultra-dense cores left behind after a supernova explosion of massive stars, and black holes are the collapsed cores of massive stars with gravity so strong that not even light can escape.
