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.
Baking soda is slightly abrasive, which makes it excellent for cleaning a patio's rough surfaces. Mixed with water, baking soda dissolves dirt and grease. Add a half-cup of baking soda to 1 gallon of water for a gentle cleaning solution. Mix equal parts baking soda, water and salt for more highly soiled areas.Clean off baking soda residue by spritzing it with vinegar -- a natural chemical reaction creates harmless carbon dioxide gas and water.ust spray undiluted vinegar on the weeds, and they'll perish. If you don't care for vinegar's distinctive scent, add essential oil to your spray bottles. Fifty drops of peppermint essential oil added to 1 gallon of white vinegar makes a pleasantly invigorating cleaning solution.