White dwarf and neutron star.
and second one
Plz answer me fast
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Answers
Answer:
(a)
White dwarfs are formed from the collapse of low mass stars, less than about 10 time the mass of the Sun. This star loses most of its mass in a wind, leaving behind a core that is less than 1.44 solar mass. On the other hand, neutron stars are formed in the catastrophic collapse of the core of a massive star.
(b)
Stars that have a lot of mass may end their lives as black holes or neutron stars. A low or medium mass star (with mass less than about 8 times the mass of our Sun) will become a white dwarf.
This situation in a star is similar to a pressure cooker.
White dwarf- A small very dense star that is typically the size of a planet .A white dwarf is what stars like the Sun become after they have exhausted their nuclear fuel. Near the end of its nuclear burning stage, this type of star expels most of its outer material, creating a planetary nebula. Only the hot core of the star remains.A white dwarf is very dense: its mass is comparable to that of the Sun, while its volume is comparable to that of Earth.A teaspoon of white dwarf matter weighs 5.5 tons. Their gravity is 350,000x Earth’s
Black dwarf- A black dwarf is a theoretical stellar remnant, specifically a white dwarf that has cooled sufficiently that it no longer emits significant heat or light. The last stage of stellar evolution is a black dwarf. Because they emit no heat or light, these objects would be a challenge to detect if they existed today. However, at less than 14 billion years old, the universe is still too young to have created any black dwarfs
Neutron star- Neutron stars are created when giant stars die in supernovas and their cores collapse, with the protons and electrons essentially melting into each other to form neutrons. Neutron stars are city-size stellar objects with a mass about 1.4 times that of the sun. If the mass of the star collapsing is much more then it would form a black hole. It is about the size of a city but has mass 2 times that of the sun. Just a sugar cube of neutron star matter would weigh about one hundred million tons on Earth. Neutron stars have some of the strongest gravitational and magneticfields in the universe. The gravity is strong enough to flatten almost anything on the surface. The magneticfields of neutron stars can be a billiontimes to a million billion times themagnetic field on the surface of Earth.