Uranus is the third largest planet in our Solar System. Uranus has nine major rings and 27 known moons. This image, taken by the Hubble Space Telescope in infrared reveals cloud structures not normally visible. Methane gas in the upper atmosphere absorbs red light, giving the planet its blue-green color. Uranus is spinning on its side, probably because of a collision with a large object early in the Solar System's history.
Neptune was the first planet to be discovered not by the naked eye or by randomly searching the night sky; rather it was predicted to exist in a particular position in the sky by mathematical calculations. The calculations were sent from French mathematician Urbain Joseph Le Verrier to Johann Gottfried Galle at the Berlin Observatory and in 1846 Neptune was discovered by telescope based on the predicted position.
Galactic Pyrotechnics on Display Anomalous arms are seen in this composite image of NGC 4258 from NASA's Chandra X-ray Observator, NSF's Karl Jansky Very Large Array, NASA's Hubble Space Telescope and Spitzer Space Telescope.
Astronomers utilizing NASA’s Spitzer Space Telescope have discovered a budding star system that appears to “blink” every 93 days. According to NASA, this young star system is the fourth example of a star system acknowledged to blink in such a way, and the second in the star-creating region Rho Ophiuchus. The discovery reveals that these systems might be more numerous than once believed.
The Curiosity rover’s mission to Mars will feed our hunger to know more about the Red Planet, once viewed as home to lost civilizations and canals but now seen as a desert planet that might be colonized. As we await more images and data from Curiosity, illustrated below is what we’ve learned from previous voyages to the fourth planet from the sun.