Group R Galaxies And Black Holes

A galaxy is a massive group of stars, star clusters, interstellar gas and dust, and dark matter which is all gravitationally bound together. The most beautiful type of galaxies are Spiral Galaxies. Their long twisting arms are areas where stars are being formed. Like ripples in a pond, the spiral arms seen in this kind of galaxy are circling waves. These waves cause new stars to form. That's right, they are like star farmers, planting star seeds where ever they go. Some of the new stars created in the wave are very large. Because of their size these large stars glow brighter than their smaller cousins, causing the nearby dust clouds to glow brightly. Thus any area near one of these waves glows like a fluorescent light. In other words you can't actually see the waves, the spirals that we see are the glowing clouds illuminated by large, hot stars. As the waves move on the clouds behind them dim down, no longer glowing until another wave passes through.

Black holes are among the strangest things in the universe. They are massive objects – collections of mass – with gravity so strong that nothing can escape, not even light. the closer you get to a black hole the slower time is.
BlackHole_Lensing.gif tumblr_o8sdjzwKgo1vxvrnio1_500.gif
Unless otherwise stated, the content of this page is licensed under Creative Commons Attribution-ShareAlike 3.0 License