Question about black holes and white dwarf

In summary, the sun is the biggest object with a diameter about 100 times that of the earth. A white dwarf is roughly the same size as the earth, while a neutron star is about the size of a city and a black hole can vary in size depending on its mass. Quasars are believed to be black holes while quark-stars are unknown in size but would be smaller than a black hole. The diameter of an object is a better indicator of its size than its mass.
  • #1
hager mahdy
5
0
hi
i want to ask aquestion
what is the biggest qatar:
black hole or white dwarf or nutron star or the sun
please i want to know the biggest one and then and then and the smallest one
thaaaank you very much
 
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  • #2
Well the word "qatar" doesn't make any sense, but it is clear what you are asking.

The sun is about 100 times as big (in diameter) as earth

A white dwarf is roughly the same size as the earth, depending on its mass.

A neutron star is about the size of a city, 10-15 km in radius.

A black hole can be any size, depending upon its mass.
 
  • #3
nicksauce said:
Well the word "qatar" doesn't make any sense, but it is clear what you are asking.

The sun is about 100 times as big (in diameter) as earth

A white dwarf is roughly the same size as the earth, depending on its mass.

A neutron star is about the size of a city, 10-15 km in radius.

A black hole can be any size, depending upon its mass.

I'm guessing he means either quark-star, or quasar.

Hager Mahdy, if you did mean Quasar, they are believed to be the active nuclei of distant galaxies, and therefore are black holes. If you meant Quark-Star (possibly a step between Neutron Star and Black Hole) then no one knows, but it would be more compact than the former, and less so than a black hole.

Remember that a black hole is best defined by its event horizon, which is purely a function of its mass, as Nicksauce said. They seem to get quite massive, especially AGNs.
 
  • #4
thank you very much and iam sorry but i mean diameter
thaank you
 
  • #5


Hello,

Thank you for your question. To answer your question, the biggest object among black holes, white dwarfs, neutron stars, and the sun depends on the specific measurement you are considering.

In terms of mass, black holes can be the biggest as they have a mass of millions or even billions of times that of the sun. White dwarfs, on the other hand, have a mass similar to that of the sun, while neutron stars have a mass of about 1.5 times that of the sun.

In terms of size, white dwarfs are the smallest among these objects, with a typical size of about the Earth's radius. Neutron stars are slightly bigger, with a size of about 10-20 kilometers in diameter. Black holes, on the other hand, do not have a defined size as they are infinitely dense and have a gravitational pull that is so strong that even light cannot escape.

I hope this answers your question. If you have any further questions, please feel free to ask. Thank you.
 

What is a black hole?

A black hole is a region in space where the gravitational pull is so strong that nothing, including light, can escape from it. This is due to the extreme density and mass of the object, which causes a curvature in space-time.

What is the event horizon of a black hole?

The event horizon is the boundary of a black hole, beyond which the gravitational pull is so strong that even light cannot escape. This is the point of no return for anything that gets too close to a black hole.

How are black holes and white dwarfs different?

Black holes and white dwarfs are both end stages of a star's life, but they are formed through different processes. A black hole is formed when a massive star collapses under its own gravity, while a white dwarf is formed when a low-mass star runs out of nuclear fuel and its core collapses.

Can a white dwarf turn into a black hole?

No, a white dwarf cannot turn into a black hole. White dwarfs do not have enough mass to undergo a gravitational collapse and become a black hole. They are supported by electron degeneracy pressure, which prevents further collapse.

What happens to an object that falls into a black hole?

Once an object crosses the event horizon of a black hole, it is pulled towards the singularity at the center. The immense gravitational pull causes the object to be stretched and compressed, a process known as spaghettification. Eventually, the object will be crushed into the singularity, where space and time cease to exist.

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