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.
Gravitational collapse is facilitated by particles moving away from the area of deformed crust. In contrast, convergent collapse occurs when the crust has been previously thinned. The particles move towrd the area of thinning. There is not sufficient evidence to prove the existence of convergent collapse at this time.