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.
How the interstellar wind is focused by the sun's gravitational field (click for Flash movie). Our sun is moving through the local interstellar gas cloud approximately into the direction of Scorpio with a speed of about 25 km/sec. As a result of this motion, an interstellar wind with that speed is blowing through our planetary system.