Juno Measures the Heat Below Io's Restless Surface
Illustrative image Juno's Microwave Radiometer (MWR) was built peer deep down into Jupiter's massive atmosphere. But during the spacecraft's extended mission, it's been studying the Galilean moons. During two flybys of volcanic Io, the spacecraft its MWR to measure the heat flowing from deep within the moon.
Source：Universe Today
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