A hole opposite of a black hole possible?

  • #1
Felix Quintana
36
0
Since black holes takes matter to a singularity, theoretically could there be a hole that does the opposite? As in push everything away like negative pressure.
 

Answers and Replies

  • #3
Felix Quintana
36
0
Oh cool! Thanks!
 
  • #4
39,036
16,786
A white hole, which does exactly what you proposed

Not really. A white hole has attractive gravity, not repulsive gravity. See below.

could there be a hole that does the opposite? As in push everything away like negative pressure.

No. A black hole, and its time reverse, a white hole, are both vacuum solutions; there is zero pressure everywhere (and also zero energy density). The white hole has things coming out of it and decelerating as they rise away. The black hole has things falling into it and accelerating as they fall. Gravity is attractive in both cases.

For a solution with "negative pressure", you need either a cosmological constant or something like a scalar field, i.e., not vacuum.
 

Suggested for: A hole opposite of a black hole possible?

Replies
114
Views
3K
  • Last Post
Replies
9
Views
432
  • Last Post
2
Replies
62
Views
1K
  • Last Post
Replies
11
Views
599
Replies
11
Views
326
Replies
18
Views
474
  • Last Post
Replies
34
Views
744
Replies
24
Views
513
Replies
15
Views
454
  • Last Post
2
Replies
63
Views
2K
Top