Knowing that the escape velocity of the Sun is 617 km/s and that it's mass is 1.989 e30 kg, and the speed of light: 299 792 km/s, tell me if this calculation is right. I'm trying to calculate the minimum mass of a black hole. And we know that light cannot escape a black hole so...(adsbygoogle = window.adsbygoogle || []).push({});

Comparing to the sun:

299 792/617 km/s = approx. 485.88, so now if a mass of 1.989 e30 kg has an escape velocity of 617 km/s then:

1.989 e30 kg x 485.88 = 9.66 e32 kg (a pretty much exact mass of an object that can barely emit light.)

So this would mean that a black hole can have a minimum mass of about

1 e33 kg???

100000000000000000000000000000000 kg is some heavy stuff lol.

So are my calculations right?

Thnx

**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!

# Minimum mass of a black hole

Loading...

Similar Threads for Minimum mass black | Date |
---|---|

I What is the minimum mass of a neutron star? | Jan 22, 2018 |

B Brown Dwarf Minimum Mass | Jul 8, 2017 |

I Calculating semi-major axis and minimum mass of an exoplanet | Jun 6, 2016 |

B What would be the minimum size for a galaxy to have a disk form? | Mar 27, 2016 |

What the minimum mass for a habitable exoplanet or moon? | Sep 9, 2012 |

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