Earth's Movement and Atmosphere with a Black Hole Sun

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Replacing the sun with a black hole of the same mass would not alter Earth's movement due to the unchanged gravitational force. Earth would continue its regular orbit, as gravity depends solely on mass. However, the absence of the sun's thermal energy would cause Earth's atmosphere to freeze, leading to drastic changes in conditions. Black holes do not exert more gravitational pull than other objects of equivalent mass, but their proximity can create stronger gravitational effects. The discussion highlights the importance of mass in gravitational interactions and the implications of losing the sun's heat.
havaliza
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please help me to answer to this problem:

Problem: Imagine that we replace sun with a black-hole of same mass.
1. How would be movement of earth?
2. Does the atmosphere of Earth change? If yes, explain.​

thnx
 
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What are the relevant equations here?
 
From a standpoint of the gravitational effects, nothing on Earth would change. From the standpoint of the sun's thermal energy, the Earth would quickly freeze.
 
You mean that Earth will continue it's regular movement around the earth?
I was thinking that Earth would straightly go into the black-hole, wouldn't it?
Could you explain a little bit more, please.
 
havaliza said:
You mean that Earth will continue it's regular movement around the earth?
I was thinking that Earth would straightly go into the black-hole, wouldn't it?
Could you explain a little bit more, please.

Gravity depends on one thing and one thing only: the mass.

Since you've replaced the sun with an equivalent mass - regardless of what that mass is - the gravitational force will not change.

Black holes do not have any more gravitational pull than any other object of an equivalent mass. What's unique about black holes is that you can get much closer to them, which is where gravity gets very strong.
 
DaveC426913 said:
Gravity depends on one thing and one thing only: the mass.

Since you've replaced the sun with an equivalent mass - regardless of what that mass is - the gravitational force will not change.

Black holes do not have any more gravitational pull than any other object of an equivalent mass. What's unique about black holes is that you can get much closer to them, which is where gravity gets very strong.

Wow! Thank you!
I got it.
 
Also, a 'normal' black hole created during a supernova event is much less massive than the original star. A huge part of the star is blown off as part of the explosion. Our sun is not massive enough for that to occur, though.
 
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