reply to post by NotAnAspie
What I meant was "what travels *faster* than the speed of light", because that is the only way to detect what is there & that is what I meant
by gauging it.
I see. Well, nothing travels faster than the speed of light as far as we know. Tachyons have never been detected and there is no theoretical necessity
for them to exist, either.
I can't quite wrap my head around a black hole surrounded by a vacuum, but I will certainly look into it. The reason I can't is because if it
is surrounded by a vacuum, there's nothing stopping us from seeing photons emitted from it or anything else that could be visually
Hawking radiation is just a trickle of infrared photons, emitted in all directions. Unless quite a few of those photons happened to strike your
detector you wouldn't know a hole was there.
Just how small is this trickle? Well, the temperature of a black hole of M
solar masses is only .0000006/M degrees Centigrade above absolute
zero. Unless the hole is tiny – like virus-sized – you wouldn't be able to detect its Hawking-radiation emissions. And black holes that put out a
lot of Hawking radiation are very short-lived, so the chances of some telescope being pointed in the right direction at the right moment to detect one
As for a black hole surrounded by a vacuum... I'd like to see this if you know of a particular example.
The above explains why it is very unlikely that any will be detected. We'll have to create one ourselves!
More about Hawking radiation
The solar winds absolutely have to exert some type of force on earth, even if it is the orbit that mainly holds it in place... the sun's solar
winds create a bow shock between it and the earth. That is definitely force to some degree.
As I type this, the solar wind density (updated every ten minutes here
) is five protons per cubic
centimetre, which is about average. The solar wind is really a pretty high-grade vacuum, and presents absolutely no obstacle to the motion of Earth
(or anything else) round the Sun.
We are not close enough to the sun for it's gravity to effect us in a large way, yes, most of our gravity is diamagnetic...
Gravity works at all distances, though its force decreases in an inverse-square ratio with distance. The Sun's gravity works on Mercury and it works
on Pluto just as it works on Earth, but none of them fall into the Sun because they are moving too fast for that – Earth much faster than Pluto, and
Mercury much faster still.
Diamagnetism has nothing to do with gravity.
Information (is) only able to exist on the surface (of a black hole because)... it's full. There is no more room inside of it (for
information) because it is super dense & nothing else can fit into it. It is hotter than imaginably hot and simply disintegrates anything that falls
into it and turns it into radiation.
A black hole is never full. That's why it keeps swallowing things up. Black holes are insatiable.
A black hole is never hot. Black hole temperatures (again, except for very tiny ones) are just a few billionths of a degree above absolute zero.