- Europa probably has enough oxygen in its ice-covered ocean to support complex life.*
- The methane in Mars's atmosphere may be a by-product of life.**
- There is water on the Moon. No, really.
- There may be life on the Moon too.***
- There may also be water (and life?) on Saturn's moon Enceladus.
And finally, even though the Orion nebula isn't part of the solar system, there are life-enabling molecules there, too.****