Các em có biết: Đêm Trung thu kể chuyện trăng
Nửa đầu tháng (âm lịch), gọi là trăng thượng huyền, nửa cuối tháng gọi là trăng hạ huyền. Giữa thượng huyền (mồng 7, mồng 8 âm lịch) mặt trời, trái đất và mặt trăng hình thành một góc vuông. Mặt trăng lúc ấy mọc giữa trưa. Đến giữa hạ huyền (22, 23 âm lịch), chúng lại hình thành một góc vuông và trăng mọc lúc nửa đêm.
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csOpReG7nk5GxJBy4buXZcOpxqE=