Located in the Coma Cluster, about 300 million light years away from Earth, the orb is actually a distant view of the giant elliptical galaxy NGC 4889. At the center of that galaxy lies a sleeping giant: a supermassive black hole that is 21 billion times the mass of our sun. The size of a black hole can be estimated by its event horizon, or the distance from the center of the black hole at which nothing can escape its gravitational grasp.
How To Remove Oil Stains. To remove concrete oil stains from your driveway, garage, or patio, simply apply Pour-N-RestoreÂ® Oil Stain Remover to the oil stain! No scrubbing or rinsing needed. Once liquid has dried, sweep up the remaining powder and allow the remaining moisture to dry.
Removing Oil from Slate Floors. 1  Use a paper towel for absorbing the oil. 2  Use plenty of cat litter to cover the remaining stain. 3  Allow the cat litter to stay on the stain for up to an hour.  Vacuum up the cat litter or sweep it 1  away. Rinse the area with plain water and dry it with a soft cloth.