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.
As astronomers reconstruct it, a cloud of interstellar dust and gas floated in our inconspicuous part of the Milky Way galaxy for several billion years. Then, a nearby supernova explosion blasted new material and a lot of energy into the cloud; as a result, or by coincidence, the cloud began to collapse on itself.