What color is moonlight typically, and what other colors can moonlight look like from our perspective on Earth?

Jupiter’s moon Io may have been volcanically active throughout its life. In this image of Io, taken by NASA’s Juno spacecraft in 2023, a bright volcanic plume can be seen on the left, just ...

These composite views depicting volcanic activity on Io were generated using both visible light and infrared data collected by NASA's Juno spacecraft during flybys of the Jovian moon on Dec. 14 ...

Assuming Io initially held some 20,000,000,000,000,000,000,000 (or 20 sextillion) tons of sulfur, the amount it’s lost so far leaves roughly 200 quintillion to 1.2 sextillion tons of sulfur ...

Because Io is so close to its massive host planet, the moon is subjected to a tremendous gravitational pull as it orbits Jupiter once about every 42 hours, according to the Planetary Society.

Moon-quakes first measured by the Apollo astronauts have been attributed to these tides. The tides that Jupiter raises on Io, however are powerful enough to induce sufficient friction in that moon ...

A map of 266 hot spots on Io made using data from NASA's Juno probe, identified in data obtained from March 2017 to July 2022. The larger the symbol, the greater the 4.8 μm spectral radiance, a ...

If Io did have a sub-surface ocean of magma, the moon would deform under Jupiter's gravity by a significant amount. However, the Doppler measurements suggest that Io is pretty rigid, which means ...