Cat's Eye Nebula, Hubble shot. 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.
Hubble Captures View of 'Mystic Mountain' Nebula
Johannes Kepler documented the appearance of a bright new supernova in 1604, which became known as Kepler's Supernova. The remnants of the giant stellar explosion can still be seen today. This image combines data from the Spitzer Space Telescope, Hubble Space Telescope and Chandra X-ray Observatory. Credit:NASA
Pluto (2,330 km), a.k.a. the "Ninth Planet," a plutino (a Kuiper Belt plutoid that is in 2:3 resonance with Neptune) and the first trans-Neptunian object ever discovered; this image is the best yet available (from the Hubble telescope); the New Horizons spacecraft is scheduled to fly by Pluto in 2015
Pluto, as seen by the Hubble Telescope.