2 ms·
Fascinating. I'm clearly guilty of believing left Black Holes are like plug-holes in the centre of galaxies and eventually everything will swirl down them. So
by sambeau 14y ago
Fascinating.
I'm clearly guilty of believing left Black Holes are like plug-holes in the centre of galaxies and eventually everything will swirl down them.
So this isn't a valid picture? Do you have a more realistic one for me instead to think about?
- splat 14y agoFar from the event horizon, a black hole acts like a point mass just like every other star. If, for instance, the Sun were to immediately turn into a black hole, the Earth would continue to orbit it as if there had been no change.
- sambeau 14y agoAssuming it kept the same mass? And even if it had a lot more mass?
- splat 14y agoAssuming it kept the same mass. If it had a lot more mass, the Earth's orbit would be identical to it's orbit around a star with that much more mass. The fact that an object is a black hole only becomes relevant when something passes the event horizon. Outside the event horizon, it acts like any other object with the same mass.