According to recent findings, Amalathea appears to radiate more heat than it receives from the Sun. According to NASA, this could be due to Jupiter’s magnetic field or tidal stress.
‘Amalthea Moon’ is one of the 53 satellites of the planet Jupiter; It was the first discovered after the four Galilean moons, and is the fifth largest moon overall in size.
In terms of proximity to Jupiter, Amalthea is Jupiter’s third moon—and it takes only 12 hours to make one orbit around Jupiter.
Amalthea also forms Amalthea Gossamer Ring, one of the fine rings that surround Jupiter. This is Jupiter’s faint innermost Gossamer Ring.
So far only two missions Voyager and Galileo have passed near Amalthea. Both Voyager-1 and Voyager-2 spacecraft took pictures of the ‘Jovian’ moon during their flight in 1979.
Source – The Hindu