How would earth react if it got sucked into a black hole?

Answer 1

First, this seems pretty unlikely for the foreseeable future -- there's no evidence of a full sized black hole anywhere near earth (Chandrasehkar's limit says neutron stars can't occur at less and 1.44 solar mass, and stellar black holes are believed to occur at no less than 3 solar masses, and possibly more).

Smaller, primordial black holes may (or may not) once have existed, but Stephen Hawking's work on Hawking Radiation shows that, the smaller the black hole, the more energy gets expelled, hence quantum black holes (tiny ones) are likely to "evaporate".

However, if we imagine that there was a black hole very near the earth, we'd first see tidal effects as the earth responded to the gravitational field of the stellar body. Depending on how far away the earth and our imaginary black hole are, we conceivably could go into a stable orbit around it (although, dependiing on the mass, the accretion disk of the black hole might well emit enough radiation to cook us). Farther in, the earth would eventually spiral into the Schwarzchild radius. Once i9nside the Schwarzchild radius, it is postualted we could (a) see the incoming light from another universe (whimsically named "elsewhere" because "you can't get there from here"). Also, some of Hawking's work hints that, while traval along the spatial axes would no longer be mutable (as they are here in n-space, where we can travel freely spatially, but only in one direction in time), temporal travel would, in a manner of speaking, be possible.

On the other hand, Einstein's concepts of relativity give us some real problems here, particularly time dilation. Briefly, the following assumptions are made (and so far have not been disproven):

• The effects of gravity are indistinguishable from accelleration.
• When viewed by an external observer, an object accellerating towrds the speed of light moves more slowly through time.
• And, from a relative observer's standpoint, that object accellerating towards the speed of light reaches c or light speed exactly an infinite number of years in the relative observer's future.

This implies that, if there was a black hole across the room from you (all other effects notwithstanding) and you fired a bullet into it, you would see the bullet slow and come to an apparent stop (relative to you), before it could cross the event horizon. This is because gravity and accelleration are indistinguishable, so the grvaity at the event horizon is equivalent to a lightspeed effect. This in turn means that, outside the black hole, one cannot observe matter passing the event horizon.

How this works in reality is a bit of a mystery. Of course, we cannot "see" a black hole -- nothing escapes the Schwarzchild radius, so cannot be "obseved". But gravitational effects outside the event horizon can be seen. And we observe the binary star, Cygnus X-1, and note that for two comparatively cool stars, that body is emmiting a huge amount of x-ray radiation. Coupling that with observations of eccentricities in X-1a and X-1b's orbits, we postulate the existing of a super-dense object of perhaps 10 solar masses, i.e. a black hole, As the black hole sucks in matter, friction heats, then superheats that matter, which forms an accretion disk as it falls into the black hole. So, we have a superhot, brightly glowing disk surrounding the black hole, as well as two stars that are sharing matter with each other and quite possibly the black hole too.

We see the xray radiation, which indicates the presence of an accretion disk, so we assume matter IS falling into the black hole.

So -- in answer to your question -- one possiblity is we enter the black hole, see the stars shining in elsewhere, and possibly travel in time, perhaps exiting the black hole an infinite number of years in the past -- or perhaps not. Also, there's the possibility that, due to Xeno's paradox, you'll never actually see anything go past the Schwarzchild radius.

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Answer 2

A black hole is a singularity-a point-of matter with massive gravity. If Earth were to come too close to one, it would first start orbiting the black hole, the same way a planet orbits a star, because both stars and black holes are gravitationally similar. As Earth orbits the black hole, getting closer and orbiting faster (according to Kepler's laws), its lightweight atmosphere would be the first part to be stripped off and sucked into the black hole. This would cause life to die before anyone/anything could actually experience the solid planet itself being sucked in. Next, the solid parts of the planet would be stripped off, and gradually, the entire planet would be stripped off as it orbits the black hole at a consistently higher speed.

It's a misconception that the entire planet would just be "sucked in" at once. Orbiting would first happen because black holes are the same mass as stars and gravity works the same way.

When matter is sucked in, the particles that get sucked in are stripped into matter and their antimatter, which are quantumly entangled, and the antimatter is emitted as a beam perpendicularly to the axis of the black hole. Once the matter is inside a black hole, it stays there because the force of gravity is too strong to release it. However, some energy/matter is released gradually in the form of Hawking radiation.

Answer 3

We would become part of the black hole. It would still orbit the Sun in the same manner, but have an event horizon of about the size of a tennis ball.

A day would be measured in seconds due to the conservation of angular momentum.

Answer 4

If Earth ever tumbled into a whirlpool of blackness, AKA black hole, our atmosphere would collapse and the temperature would drop rapidly, and the oxygen would flow out of Earth!

Answer 5

Well the black hole would increase in size and the entire Earth would be crumbled up into tiny bits of matter.

Answer 6

The planets and the moons near the black hole would get sucked in and destroyed instantly.

Answer 7

That won't happen. Anyway, if it did, the entire Earth would soon collapse as well.

Answer 8

In that case, Earth would be utterly destroyed.