... NGC 5882: A Small Planetary Nebula . ... Will most stars one day look like this? ... Although planetary nebulae can appear similar to planets like Uranus and Neptune, they are actually gas clouds surrounding stars typically hundreds of light years away. ... A Close-Up of the Lagoon's Hourglass . ... A Close-Up of the Lagoon Nebula . ... Ribbons of red-glowing gas and dark dust surround massive young stars in this close-up of the Lagoon Nebula taken by the Hubble Space Telescope. ...