Can you orbit a black hole inside the event horizon?
Yes, stable orbits exist inside event horizons for certain classes of black hole solutions. Yes, stable orbits exist inside event horizons for certain classes of black hole solutions.
What if we were orbiting a black hole?
The biggest problem we would face if we replaced the Sun with a black hole would be the absence of incoming solar energy. The planet Earth would go completely dark. Thanks to our planet’s infamous greenhouse gas effect, the global temperature would not be reduced instantaneously.
Is there an escape velocity for something that has crossed the event horizon of a black hole?
At the event horizon, the escape velocity is equal to the speed of light. Since general relativity states that nothing can travel faster than the speed of light, nothing inside the event horizon can ever cross the boundary and escape beyond it, including light.
Could life survive on a planet orbiting a black hole?
So planets could potentially form around black holes, but that’s no guarantee that they offer a life-friendly environment. On Earth, living things are hugely dependent on the light and warmth from the Sun to survive. Without the glow of a star, life around a black hole would likely need an alternative source of energy.
What would happen if Earth got stuck in a black hole?
Our atmosphere would start to be vacuumed up. And then huge chunks of the Earth would rip apart and follow suit. If Earth managed to fall into the orbit of the black hole, we’d experience tidal heating. The strong uneven gravitational pull on the Earth would continuously deform the planet.
What is the event horizon of a rotating black hole?
A rotating black hole’s event horizon separates into an outer horizon and an inner horizon. The outer event horizon of such an object acts like a point of no return, just like the event horizon of a nonrotating black hole. The inner event horizon of a rotating black hole, also known as the Cauchy horizon, is stranger.
How do you find the orbital period of a black hole?
The orbital period t of an object in circular orbit at radius r r from a black hole of mass M M, as measured by an outside observer (at infinity), is given precisely by Kepler’s third law, GM t2 (2π)2 = r3. G M t 2 (2 π) 2 = r 3.
What is the most stable orbit for a black hole?
Otherwise, it generally stands to say that whatever orbits are stable for any large body are also stable for a black hole. Actually, a black hole will be even more stable. All the planets are stars have a complex gravitational tapestry due to density changes due to composition changes.
Is it possible to enter a black hole without a rocket?
The orbit at 2 Schwarzschild radii corresponds to zero kinetic energy at infinity, so it is possible to fall freely into this orbit from infinity without rocket power. The instability of the orbit gives us a choice: fire the manoeuvering thrusters to speed up ever so slightly and exit to safety; or slow down and enter the black hole.