A montage of Jupiter and its volcanic moon Io, taken during by the New Horizons spacecraft - en route to Pluto - in early 2007. Notice the volcanic plume above Io's darkened surface. Image via NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute/Goddard Space Flight Center/Cosmos.
Io's volcanoes have fascinated scientists since the Voyager 1 spacecraft first discovered them nearly 40 years ago. Now a comprehensive new report - based on ground-based studies - unveils new mysteries about the most volcanically active world in our solar system. Read more.
Most people don’t associate the U.S. Pacific Northwest with earthquakes, but maybe they should. It’s home to the 600-mile (1,000-km) Cascadia megathrust fault, stretching from northern California to Canada’s Vancouver Island. Read more.
Spica is one of 4 1st-magnitude stars shining close to the ecliptic, which is the plane of Earth's orbit around the sun projected onto our sky. The green line on this chart represents the ecliptic. Read more.
View at EarthSky Community Photos. | Richard Swieca in Ste. Agathe des Monts, Quebec, Canada, caught this image over the weekend. He wrote: "A bee getting nectar from a lilac. Just the moment!" Thanks, Richard!
