Astronomy Picture of the Day . The Butterfly Nebula from Hubble . ... The bright clusters and nebulae of planet Earth's night sky are often named for flowers or insects, and NGC 6302 is no exception. ... The Sun's photosphere has thousands of bumps called granules and usually a few dark depressions called sunspots. ... Documented in this modern day composite of two images from 2003 and 2011 the ejecta from the explosion, popularly called the Firework Nebula, continues to expand into space. ...