is it true that black holes will appear after the sun collapses???

Answer 1

AAAAAAAAARRRRRRRRRGGGHHH!!

What is it about black hole questions that makes everyone think they can submit any old answer they want? Please, if you do not know what you are talking about, don't confuse other people with rubbish!


Gel, please disregard the majority of answers given above (except those that say "no, the sun is too small"). Our sun is not massive enough to collapse into a black hole. It is not massive enough to go supernova. It is not massive enough to even undergo carbon detonation.

The key factor in deciding how a star will live out its life on the main sequence and then how it will end is its mass. The more massive the star the faster and hotter it burns, and the more fusion reactions it can ignite in its core. A massive star must fuse an iron core in order to undergo supernova explosion* and/or collapse into a black hole. Our sun will only get hot enough to fuse hydrogen and perhaps helium in its core, before expanding into a red giant and losing its outer layers to leave a dwarf core.

*If a star leaves a dwarf core which is greater than the Chandrasekhar limit (1.4 solar masses), or accretes over this limit, then it can undergo a subsequent supernova explosion which will tear the core apart. Our sun will leave a dwarf core much less than 1.4 solar masses.


Hope this helps!
The Chicken

Answer 2

The escape velocity (for a space rocket?) from earth is about seven miles per second. If the mass of the earth was concentrated into a relatively small ball, the escape velocity (with the same mass!) would be much higher because the surface of the ball would be much closer to the center of mass. Gravitational forces vary as the inverse square law.

If the mass of the sun was concentrated into a small ball the escape velocity of course would be much higher than for the concentrated earth. However, a black hole must have a much greater mass than our sun because our concentrated sun could still emit light but the escaped velocity of the black hole is greater than the speed of light and no light can escape (that is why it is black!). Hope that helps a little.

Answer 3

yes the black holes appear after the sun collapses

Answer 4

Some stars do that, but not our sun, it is too small.

It need to be a lot bigger, three to five times the mass of the Sun to have a chance to become a Black Hole (This depands on various facture including how much Mass the star lose in the process).

Answer 5

Theoretically, thats the way it goes. When the gravity of the star becomes too strong, it will collapse on itself and form a black hole. But the world may never know :).

Answer 6

i would think after the collapse of the big ol sun, there'd be a big ol black hole right there.....

But i believe the sun the moon and the stars will remain forever...
so would earth if it werent for humans.

Answer 7

I think what stars similar to the sun are theorized to leave is a planetary nebula. They have nothing to do with planets, astronomers before more recent times thought they looked like planets. They are quite beautiful. That's all I see fit to add, Magic Chicken did a good job explaining things clearly from what I know on the subject.

Answer 8

No.

The sun is way too small.

A stellar mass about 6 times that of the sun is required to form a black hole.

Answer 9

sun is too small for that. it should be three times as massive as it is now to turn into a black hole after it's death . the sun and such stars, will tern into a White Dwarf.

Answer 10

Eventually the gravity of a dead star turns in on itself and yes, forms a black hole. It takes a long Stanking time though!