What evidence is there for volcanism on other planets and moons in the solar system?

Answer 1

Our moon has fields of cooled magma coating the surface, which are the dark spots we see on earth. Jupiter's moon Io the most volcanically active body in the solar system, we've observed that during satellite fly-bys.

Answer 2

Evidence of volcanism on other planets and moons in the solar system includes volcanic features such as calderas, lava flows, and volcanic plains seen in images from spacecraft missions. For example, both Mars and Venus show evidence of past volcanic activity through features like shield volcanoes and lava channels. The moons Io (Jupiter's moon) and Triton (Neptune's moon) also exhibit active volcanic activity with erupting geysers and cryovolcanoes.