Join Donate

Emily LakdawallaOctober 14, 2010

Crack the code for a message from Mars, redux

Waaaay back when Spirit and Opportunity landed on Mars in January 2004, the Planetary Society helped the public participate in the missions with a number of projects, including one where we printed "secret codes" around the edges of the two names-bearing DVDs that were bolted to the Mars Exploration Rover landers. The secret codes weren't revealed until the rovers themselves took photos of the DVDs and returned them to Earth, and then people got to decipher the messages for prizes. Not quite two years later, we redesigned our website, and one of the pages that didn't get ported over to the new design was the page that gave people clues for deciphering the codes.

Nobody missed it until this year, but suddenly I've had a slew of inquiries about clues to deciphering Spirit's DVD. So I dug into our old website backup, and have now reposted the clues to decoding Spirit's DVD. Even if you've solved it before, if your memory is as bad as mine is, you may enjoy solving it again!

Spirit Sol 2 DVD photo: L4 (red) filter

NASA / JPL-Caltech / Cornell

Spirit Sol 2 DVD photo: L4 (red) filter
On Sol 2, the rover's second Martian day, mission engineers commanded the Panoramic Camera (Pancam) instrument to capture four images of the DVD assembly. The four images were captured through four different filters: a red filter, a green filter, a blue filter, and an "empty" filter. This is the "L4" or red filter image.

We know you love reading about space exploration, but did you know you can make it happen?

Take our Space Priorities survey and consider a gift to our Space Policy and Advocacy program to fuel more missions, more science, and more exploration.

Read more: Planetary Society Projects, Opportunity, fun, Spirit, Mars Exploration Rovers, Mars, past projects

You are here:
Headshot of Emily Lakdawalla (2017, alternate)
Emily Lakdawalla

Senior Editor and Planetary Evangelist for The Planetary Society
Read more articles by Emily Lakdawalla

Comments & Sharing
Mars
Your Space Priorities

Moon or Mars? Low-Earth orbit or deep space? Share your voice for space exploration.

Take Survey

Mars
More Space Exploration

More Missions. More Science. More Exploration. Your support is essential and leads to the joy of discovery.

Donate