Amalthea size and scale context

Amalthea is the largest of Jupiter's small inner moons, an irregular, potato-shaped body orbiting closer to the planet than Io. Imaged by Galileo, it is strikingly red — among the reddest objects in the Solar System — and so porous that it is likely a loosely bound rubble pile rather than solid rock. Read its scale context, comparisons, and journey links on the canonical object page.