Question about black holes and white dwarf

[hager mahdy]

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

 

[nicksauce]

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.

 

[nismaratwork]

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.

 

[hager mahdy]

thank you very much and iam sorry but i mean diameter
thaank you