... Also evident in this full face mosaic of Mars are numerous craters from many other impacts with smaller objects over billions of years. ... What is our Galaxy made of? ... The above plot summarizes the four known cases of normal stars having planets. ... Searchlight Beams from the Egg Nebula . ... The dramatic and mysterious looking object revealed in this Hubble Space Telescope image is known as the Egg Nebula. ... The large majestic Lagoon Nebula is home for many young stars and hot gas. ...