A new study of Cassini data has revealed bacteria-sized particles in the plumes of Saturn's ocean moon Enceladus. Could they be evidence of microbial life?
For the 1st time, astronomers say they have detected a glory on an exoplanet. Glories are a natural phenomenon, but until now seen only on Earth and Venus.
27 years ago on April 1, 1997, Comet Hale-Bopp was at perihelion, its closest point to the sun. This comet was widely seen from the Northern Hemisphere.