There are some black holes out there. They are former
stars. Yeah, it's gravity going for them. -g- The problem
is quantum gravity - if there is a field such as gravity,
there must be a quantum particle associated with it. Photons
are particles associated with electromagnetic field, for
example. There are particles associated with other fields
as well. The gravitational coupling constant is very weak, so
gravitons are not easily detectable, although some folks
are looking for them - since gravity is a field, they must be
out there. The classical theory
of gravity is Einstein's theory, and it works, of course.
There was nobody smarter than Einstein in physics.
But, getting quantum theory, I think, is a modern problem,
although I don't work in the area, or know it well. Gravity is responsible
for a lot of things in stars, black holes, galaxies, and
other huge objects in the Universe. On a small distance
scale that we are used to work with it's influence is
negligible. It's because our planet is so large and massive
that we feel gravity every day. The force of gravity is
proportional to the masses of objects. Black holes are former
stars, very massive, compressed to extremely high densities.
So, gravitational field is very large there.
EM field is the second weakest after gravity. Since we
are charge-neutral, however, we don't feel it. It's force
is Trillions times larger than gravity. |
