NASA captures stunning images of erupting volcano world during flyby.

NASA's Juno spacecraft has captured stunning imagery of Jupiter's moon Io, which is known for its volcanoes and lava. Juno made a close pass of just 22,060 miles from Io, with plans to get even closer over the coming year. Io is the most volcanic celestial body in our solar system, and observing it over time can help scientists understand how the volcanoes vary. The intense heat on Io is caused by a "tug-of-war" between Jupiter and two of its other moons, Ganymede and Europa.