How do you answer Betelgeuse?

It is in the Orion constellation, and its about 640 light-years away from Earth. It is the second brightest star in the constellation, and the eighth brightest star in our night sky.

Some time in the next million years, probably. That's a very short time for stars, but a long time for humans to wait. Astronomers are still studying it to try to make a more accurate prediction.

No. Betelgeuse is a red super-giant star, the red star at the left shoulder of Orion the Hunter.

You are actually asking what is the gravity on a surface of a star?

If you mean the star, yes, there is a star called Betelgeuse. It is in the constellation of Orion.