sit down and listen for a few mins
gravity is the result of deformed spacetime.
gravity is caused by the higgs field and the higgs field is not
dependent on mass.
the missing piece of the puzzle is the gravitational force particle i.e. the mediator aka the graviton.
the graviton is still theoretical and has not been observed.
"In theories of quantum gravity, the graviton is the hypothetical quantum of gravity, an elementary particle that mediates the force of gravitational interaction."
en.wikipedia.org
that is the bit we do not "know"
nope.
dark matter and dark energy are very different things.
dark matter is the proposed answer to observed gravitational effects within the large scale structure of space.
it is far from conclusive.
"Dark matter is a hypothetical form of matter thought to account for approximately 85% of the matter in the universe."
en.wikipedia.org
dark energy is the repulsive force that is accelerating the expansion of the universe - i.e. einstein's "universal constant".
it has a similar name but is not related to dark matter in anything like the way bosonic matter is related to energy.
"Without introducing a new form of energy, there was no way to explain how scientists could measure an accelerating universe. Since the 1990s, dark energy has been the most accepted premise to account for the accelerated expansion."
en.wikipedia.org
nope. our notions of causality start to break down at the point of the event horizon.
our physics breaks down at the sigularity or as we approach it.
er .... what ... ?
space/time has 4 dimensions. 3 of space and 1 of time.
mass distorts spacetime.
gravity effects are just straight movement through distorted spacetime.