Q: I'm reading an article and I don't know how to go back
A: Click the book icon with the star on it on the navigation bar.
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Q: I am playing the Astronomy Quiz of The Day(AQOD) again and not getting more stars.
A: To prevent abuse of the leaderboard system, you will only receive the number of stars(questions correct) on your first attempt of the AQOD each day you take it. You will not be able to earn stars for multiple attempts in a single day.