From Jupiter 's surface â '' or rather , from just above its cloudtopsâ '' Amalthea would appear very bright , shining with a magnitude of â ' 4.7 , similar to that of Venus from Earth . From Jupiter 's surface -- or rather , from just above its cloudtops -- Amalthea would appear very bright , shining with a magnitude of 4.7 , similar to that of Venus from Earth .