Keywords
2006, 21st century, acs, advanced camera, astronomical, astronomy, astrophysical, astrophysics, brightening, dust, emission, for surveys, gas, hst, hubble space telescope, light echo, light echoes, milky way, monoceros, nebula, nova, optical, shell, shells, space, star, stellar, v838 monocerotis, stock image, images, royalty free photo, stock photos, stock photograph, stock photographs, picture, pictures, graphic, graphics, fine art prints, print, poster, posters, mural, wall murals, u17323003