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What books should I read to participate in the National Astronomical Olympiad for Middle School Students?

I used to start with an astronomy enthusiast's handbook and read a good popular science book. There is not much problem in theory. The knowledge of mathematics and physics in senior high school can completely cope with calculation problems, and the main examination is the problem that can be solved by transforming an Olympic Games problem into elementary mathematics with astronomical knowledge. Theoretically, it's too scary to be different. If you can achieve 50% of the papers over the years, you will definitely get the ranking.

Also remind the landlord to remember to look at the starry sky more. The most important 20 or 30 constellations in the starry sky in the four seasons should be known, or you have no confidence in saying that you are an enthusiast.

Friendship first, competition second. Remember that competition is about cultivating temperament, not ranking. Don't forget, astronomy can only be a hobby, it can't interfere with your studies, and it can't even be used as a reason to escape from reality.