An angiogram uses X-rays and a special dye (contrast) to take pictures of the arteries in your brain, heart, and kidneys. The dye is injected into a small tube or catheter into an artery in your groin or (sometimes) your arm.
As the cloud collapses the force of gravity drawing the cloud inward gradually becomes stronger because the strength of gravity follows an inverse square law with distance. hoâ¦pe that helps.
Stephen Baxter's Raft (novel) has a universe where gravity is a million times greater than ours, and space is filled with breathable gas. Because of the much, much higher gravity, objects can form at least semi-stable orbits around black holes (which is what all 'stars' are) even in the denser gas medium. In our universe, if space was filled with gas at a barely breathable pressure of, say 50 millibars, it would quickly collapse and form stars. This is indeed what must have happened at some point after the big bang.