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.
Cancel. A nebula is an interstellar cloud that is comprised of dust and light elements such as hydrogen and helium. Find out about ho gravity and pressure keep nebulas from collapsing with help from an applied physics professional in this free video clip.Part of the Video Series: Such Great Physics.ideo Transcript. Hello, my name is Walter Unglaub, and this is how do gravity and pressure keep nebulas from collapsing. A nebula is an interstellar cloud that is comprised of dust and light elements such as hydrogen and helium.