Could Black Holes Be the Opposite of Suns in the Big Bang Theory?

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Discussion Overview

The discussion revolves around the relationship between black holes and the Big Bang theory, exploring whether black holes could be considered the opposite of suns. Participants examine the nature of black holes, their formation, and their role in the expanding universe.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants question how black holes fit into the Big Bang theory and propose the idea that black holes might be the opposite of suns, despite their gravitational pull.
  • One participant asserts that black holes and the Big Bang are independent phenomena, explaining that black holes are collapsed stars defined by the Schwarzschild Radius equation.
  • Another participant suggests that black holes behave like any other star, orbiting the galactic center and moving with the galaxy as space expands, emphasizing that they are not separate from the universe.
  • A participant references Stephen Hawking's hypothesis about primordial black holes formed from density differences in the early universe, noting the lack of observational evidence for these black holes and their non-impact on cosmic expansion.
  • One participant reiterates the question about black holes being the opposite of suns, indicating uncertainty about the intended meaning of this comparison.

Areas of Agreement / Disagreement

Participants express differing views on the relationship between black holes and the Big Bang theory, with no consensus reached on whether black holes can be considered the opposite of suns.

Contextual Notes

The discussion includes assumptions about the nature of black holes and their properties, as well as unresolved questions regarding the implications of black holes in the context of cosmic expansion.

runicle
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I am just wondering about the big bang theory. If galaxies are traveling away from us at great speeds, what about the black holes? Where does black holes fit into the big bang theory? Could it be possible black holes can be the opposite of a sun, despite it's gravitational pull?
 
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The big bang and black holes are independent of each other. Black holes are collapsed stars that have their mass collapsed past a cerain point defined by the Schwarzschild Radius equation

R= 2GM/c^2

Where M is the mass collapsing down to the event horizon which is the radius we are defining
 
In general (for this question), you can consider a black hole like any other star...black holes orbit the galactic center and are carried with the galaxy as space expands. A black hole is an object embedded in spacetime just like anything else. Granted, as you examine it closely, it's an object with some amazing properties, but it's not something separated from this universe.

Could it be possible black holes can be the opposite of a sun, despite it's gravitational pull?

Not sure what you mean.
 
Stephen Hawking postulated the existence of primordial, substellar mass black holes that 'froze' out of the big bang mess due to slight density differences in the early universe. No observational evidence of these mighty midgits has been found to date [some of them should be evaporating via Hawking radiation by now]. This would not affect expansion. A black hole has no special properties, aside from it's very high density. Save for matter very nearby, the rest of the universe would treat them no different than any other gravitating object. [i.e., same as what Phobos said]
 
Could it be possible black holes can be the opposite of a sun, despite it's gravitational pull?
diameter is 3km ,if our sun become a black hole.
 

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