MarsDial

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An image of MarsDial
An image of MarsDial

The MarsDial is a sundial that was devised for missions to Mars. It is used to calibrate the cameras of Mars landers. MarsDials were placed on the Spirit and Opportunity Mars rovers, inscribed with the words "Two worlds, One sun".

The MarsDial was created by Bill Nye "the Science Guy" and Steve Squyres.

[edit] External link

The Planetary Society's page covering the MarsDial