Making sense of the Universe

Discussions on classical and modern physics, quantum mechanics, particle physics, thermodynamics, general and special relativity, etc.

Making sense of the Universe

Postby rajnz00 on April 28th, 2021, 10:35 pm 

Space-Time I am told is a kind of a medium in which mass exists. Mass, when it is around, bends space-time. Symbiotically mass "tells" spacetime how to bend and spacetime "tells" mass how to move. But what exactly is mass? The Higgs boson we are told, accounts for it, but what is it? The electron has mass but only 1/1840 or some such figure the mass of the proton. Why does some stuff, like the proton have more mass than the electron? Is there a fundamental unit of mass out of which all other masses are made of? And what is spacetime made of? Must be made of something if it bends, vibrates and is dragged around.
And Time, is it made of events? So how exactly does it get tied up with space to form spacetime?
I read somewhere that when you fall into a black hole according to General Relativity you get crushed into a "singularity" but the singularity is Time and not Space. So the does Time get separated from Space, if it is Time that is the singularity and not space?
What about dark energy. Energy is equivalent to mass so shouldn't that be increasing the mass of the Universe and cause gravity to crunch it? Instead, it seems to acting like an anti-gravity substance and expanding it?
If it accounts for 74% of the stuff of the universe, why is it not overwhelming gravity on Earth?
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