... What is our Galaxy made of? Stellar motions indicate there is much more mass than just stars and gas. ... The above plot summarizes the four known cases of normal stars having planets. ... The dramatic and mysterious looking object revealed in this Hubble Space Telescope image is known as the Egg Nebula. ... The Deep Field . ... Galaxies like colorful pieces of candy fill the field, some as faint as 30th magnitude (about four billion times fainter than stars visible to the unaided eye). ...