Tìm hiểu pha quan sát của các hành tinh. Biết phải quan sát vào thời gian nào. Biết khi nào có thể nhìn thấy các hành tinh mỗi đêm.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
The apparition period is the time that your planet is visible. It can last anywhere from a few weeks to almost two years. You can look these up in most astronomy catalogues to figure out when your planets are visible. Most of the planets are most visible as the sky gets dark (dusk) or as the sky begins to brighten again (dawn). However, looking for them in the night sky is also possible. You have to look very late at night, when it is incredibly dark out. Combine their apparition period with the