Hello! Can anyone help me with the following question about black holes?(adsbygoogle = window.adsbygoogle || []).push({});

Let us consider a massive star which at the end of its evolution collapses into a black hole (say a Schwarzschild black hole, for the sake of simplicity). An observer far away, in its coordinate time, will never see the collapse because it would take an infinite amount of time for the star to reach its event horizon.

On the other hand, the black hole forms because the amount of proper time would instead be finite.

Since we are able to detect black holes (from indirect observations), should we infer that they are eternal? And if they are eternal, how does this possibly match with Hawking radiation (their mass should be infinite and they cannot evaporate)? Is it possible that what we see are still forming black holes?

Thank you very much!

**Physics Forums - The Fusion of Science and Community**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Black hole existence

Loading...

Similar Threads for Black hole existence | Date |
---|---|

B Is there a mathematical proof for the existence of black holes? | Jul 15, 2016 |

What do we know about existing black holes? | Oct 19, 2015 |

Black Hole Event Horizon exists? | Mar 1, 2015 |

Logical Proof That Black Holes Can't Exist! | Feb 18, 2013 |

Possible non-existence of black holes and consequences | Jun 13, 2011 |

**Physics Forums - The Fusion of Science and Community**