Cassiopeia A, an exploded star light-years away. The green ring surrounding the supernova is from the initial shock wave generated by the explosion; it measures 10 light years in diameter. - by the Chandra X-Ray Observatory - Credit: NASA
NASA's Hubble Space Telescope imagery: The Cat's Eye Nebula, one of the first planetary nebulae discovered, also has one of the most complex forms known to this kind of nebula. Eleven rings, or shells, of gas make up the Cat's Eye.
Dusty Space Cloud This image shows the Large Magellanic Cloud galaxy in infrared light as seen by the Herschel Space Observatory, a European Space Agency-led mission with important NASA contributions, and NASA's Spitzer Space Telescope.
The Eagle Has Risen: Stellar Spire in the Eagle Nebula. A billowing tower of gas and dust rises from the stellar nursery known as the Eagle Nebula. This small piece of the Eagle Nebula is 57 trillion miles long trillion km).
an hourglass nebula. The sands of time are running out for the central star of this hourglass-shaped planetary nebula. With its nuclear fuel exhausted, this closing phase of a Sun-like star's life occurs as its outer layers are ejected - its core