Welcome to Planet Four, a citizen science project designed to help planetary scientists identify and measure features on the surface of Mars. This survey aims to determine the number of craters on the Martian surface at different scales and resolutions. By counting the craters we will be able to figure out how old various geological surfaces are!
Scores are recalulated and updated when “View impact report” is clicked.
This is the beginning of a journey (some would say a "trajectory" ) along more than 200 questions. Don't worry; you don't have to answer them all at once. Do something, and come back some other day. You will find a lot of help along the way, and if you're generally happy to start, just click on "Ok, I got it!" below. If you're unsure how to answer a question, again, don't worry, answer it in the way that makes most sense to your project and you can always come back and change it later. If you still have doubts about life, the universe and everything, now or later, head to where to find help for advice and all the clarity you might look for.