Io's Hot Spots Galileo spacecraft explores Jupiter's moon Io Hot spots Eclipse Images of Io . They were acquired by NASA's Galileo spacecraft during three separate orbits of Jupiter when the moon was in Jupiter's shadow. Below them are the corresponding views of Io in reflected sunlight, reprojected from a global mosaic of images obtained during Galileo's first and second orbits of Jupiter. These lit views help to identify the locations of the hot spots seen in the eclipse images. The grid marks are at 15 degree intervals of latitude and longitude.
North is to the top.
The relatively long exposures used to obtain these eclipse images lead to some smearing of the picture elements which reduces the actual resolution. Galileo evidence for major variations in regolith properties , by D. Simonelli, J. Veverka, and A. McEwen. This image, at 5 microns, shows several hot spots on Io, which are volcanic regions of enhanced thermal emission. The area shown is part of the leading hemisphere of Io. Several other previously known hot spots are labelled in the image.