Back to Mars is a Los Angeles-based group active since 1998. It is listed with members Jared Leto, Shannon Leto, Solon Bixler, Tomo Miličević and Matt Wachter, and is associated with Apocraphex Music. Its genres include alternative pop, alternative rock, electronic, electropop, pop rock and rock.

The name is also associated with an Italian eurodance act produced by Germano Polli and Bratt Sinclaire. That project issues the single “Up Down Up”, which appears in 1996.