Orbiting in the Habitable Zone of Two Suns: This diagram compares our own solar system to a double-star system containing two planets, one orbiting in the so-called “habitable zone.” Credit: NASA/JPL-Caltech/T.
'Green fireball' over Southern California caught on camera
Saturn eclipsing the sun, with the Earth visible in the upper left section of Saturn's rings. In NASA's robotic Cassini spacecraft drifted in Saturn's shadow for about 12 hours and Cassini saw a view unlike any other. The rings light up so much tha
NASAs Kepler mission has discovered two new planetary systems that include three super-Earth-size planets in the habitable zone, the range of distance from a star where the surface temperature of an orbiting planet might be suitable for liquid water.
Cassini is one of the most ambitious efforts in planetary space exploration. A joint endeavour of NASA, ESA and the Italian space agency, Cassini is a sophisticated spacecraft exploring the Saturnian system since