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.
Stars are believed to form when clouds of interstellar gas and dust start to contract under the influence of gravity. In interstellar space, far from other stars, a cloud of gas can be very thin and still be dense enough to begin contracting.