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.
Do not do this! Muriatic acid is used to profile concrete by breaking down the top coat of the surface for epoxy coatings and sealers. If used to remove oil stains you will still have oil underneath and a weakened concrete surface that will look different than the rest of the garage floor.
1 Scrub the surfaces with the baking soda and pad. 2  The baking soda is a mild abrasive that will help to remove the baked on grease without damaging the aluminum surface. 3  For added cleaning power, use a Mr. Clean Magic Eraser in place of the green scrubbing pad. Spread the baking soda paste onto the surfaces that are covered with grease. 2  If the stains are bad, you may want to let it set for a few minutes. 3  Next, moisten a green scrubbing pad with water. 4  Scrub the surfaces with the baking soda and pad.