Which planet takes longer to circle the Sun?
Compare orbital periods in Earth days. Choose whether the second planet has a longer or shorter year. Seven rounds; figures are approximate NASA values.
No sign-up. No deposit. No cash prizes.
Compare orbital periods in Earth days. Choose whether the second planet has a longer or shorter year. Seven rounds; figures are approximate NASA values.
Compare the orbital period of the second planet with the first. Reveal the approximate values after each choice and continue through seven comparisons. The values use Earth days, so both planets are compared in the same unit.
No account, download, purchase or deposit is required. The same game, date and content version reproduce the same challenge. Replays are labelled separately from a first attempt in the retained local history. Scores are local, not verified leaderboard results. There are no cash prizes.
