The NASA Hubble Space Telescope has captured the sharpest view yet of the most famous of all planetary nebulae: the Ring Nebula (M57). Ring Nebula, is about 2,000 light-years away, and is best ...
The Helix Nebula is the remains of a star that was once similar to the sun. A white dwarf star is located at the center of the nebula and the bright ring of the Helix Nebula stretches across nearly 3 ...