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.
The stages in the formation of a one solar mass star are: 1  Initial collapse of a cloud causes it to heat up and become a protostar. 2  As it radiates away energy, gravitational collapse pulls the protostar inwards rapidly.