Creanoso Black Holes Facts and Information Bookmarks - Stocking Stuffers Premium Quality Gift Ideas

Creanoso Black Holes Facts and Information Bookmarks - Knowledgeable and Amusing Gift cards - Gift Ideas for Boys and Girls, Students, Children, Adults, and Young Readers SIX insightful and learning well-designed galaxies, packed with colorful artistic designed to encourage reading and develop good reading habit for male and female students and teachers, and adults. Inspiring reversible bookmarks with front and back designs:  A Black Hole is where gravity has become so strong that nothing around it can escape.  Black holes are truly invisible. We can't actually see black holes because they don't reflect light Black holes are formed when giant stars explode at the end of their lifecycle.  There is a special boundary around a black hole called an event horizon. Black holes can have the mass of several million suns. A physicist named John Archibald Wheeler came up with the term "black hole" Black Hole does not live forever, but slowly evaporate returning their energy to the universe