This background image of the region around supernova remnant Cassiopeia A was released by NASA’s Spitzer Space Telescope in 2008. By taking multiple images of this region over three years with ...

This image features a deep field view of the Cassiopeia constellation immersed in the glow of ionized hydrogen gas, where the two small planetary nebulas can be found, Abell 6 and the larger HFG1.

The first image is of Cassiopeia A (Cas A ... high-pitched tones. Background galaxies produce gentle plucking sounds, and the dazzling foreground star makes a dramatic entrance with a cymbal ...