If you’ve been learning about terms for outer space in Korean you might have noticed 성 pop up multiple times, 성 has Sino-Korean origins and uses the hanja 星 which means a star or planet. You’ll especially see it for planets in our solar system which all, excluding earth, end with 성 and have their own meaning for their names!
You probably already know the 4 seasons but seasons in Korean can go more in-depth than that! Following the Chinese lunar calendar Korea’s traditional calendar has a solar system for seasons too, spaced approx. 15 days apart these dates mark specific points in the seasons.
I remember really having an issue with sino vs native korean numbers and this is a recourse I found that can really help you out if you find yourself in the same position! You can play through 1-100 on both the sino and native korean numbers games for a nice review and test on your skills.