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 the galaxies first collide, the tidal forces act to distort each disk, launching the tidal tails. Moving at parabolic velocity, the galaxies quickly pass one another and move apart, reaching maximum separation at T ~40 (unit time is roughly 10 million years).