Thought Experiement: The Earth's Fate with Added Mass

[Hyperspace2]

Thought experiement.

1) If i simply go on adding mass on earth(spherical distribution of mass), will the Earth be like as it now or it would condense with high gravitational field, i suppose it will be condensed
with gravity and it will have a nuclear fusion reaction and become like sun.

2) ANd adding more and more mass further, let's us suppose it would come at point where it crosses escape velocity= 3*10^8 m/s. will it became black hole same as traditionalblack hole or it would be completely different one.

please comment.

 

[russ_watters]

1. Well I suppose if you add enough hydrogen, it would eventually become a star. But recognize, you'd have to add many, many times the current mass, so really it wouldn't even be relevant that you started with earth. Before it became a star, at some point it would look more like Jupiter.

2. All black holes are pretty much the same, differing mostly in mass. Add enough mass and you can make one.

 

[Hyperspace2]

Thanks