Planet Mars: 1979 (2015) - FAQ
Frequently asked questions about this film.
What is the length of a Martian year?
A Martian year is 687 Earth days long.
How long is a day on Mars?
A day on Mars is about 24 and a half hours long.
What did the Mariner 9 spacecraft reveal about Mars?
Mariner 9 transmitted more than 7,000 photographs, revealing a cratered landscape with features suggesting that water may have once flowed on Mars.