Explore The Sky: Night & Day
In March, the celebration of the 2009 International Year of Astronomy continues with observing the sky by night and by day. Now is the perfect time to get outside and observe our celestial neighbors.

The Kepler Telescope
The Kepler Telescope, set to launch no earlier than March 6, 2009, will be the very first mission capable of finding Earth-sized planets within our own galaxy.

Surprising Saturn
Our solar system's ringed giant has been a consistent source of surprises for 400 years.

Our Solar System: Galileo's Observations of the Moon, Jupiter, Venus and the Sun
February 15th marked the 445th birthday of Galileo Galilei, whose observations of our solar system and the Milky Way revolutionized our understanding of our place in the Universe.

Titan Saturn System Mission Backgrounder
Learn more about Saturn's intriguing moon Titan and past and future efforts to explore it with robotic spacecraft.

Hot on the Trail of Cold Volcanoes
The Cassini spacecraft is revealing even more intriguing evidence for icy volcanoes on Titan through its radar-mapping instrument.

Europa Jupiter System Mission Backgrounder
Learn more about Jupiter's intriguing moon Europa and past and future efforts to explore it with robotic spacecraft.

Titan: Frozen in Time or Constantly Evolving?
Once thought to be frozen in time, new evidence hints that Saturn's giant moon Titan remains geologically active.

Our Planetary Neighborhood
Our solar system continues to deliver surprises 400 years after Galileo Galilei used his telescope to get the basics sorted out.

Gateway to the Solar System
Earth's Moon has remained one of the most fascinating objects in our solar system for centuries.