...the conditions are some of the best in the world. Because you're at a high altitude, usually the clouds are below the summit area and so you're able to have clear nights most nights of the year.
世界的にみてもすばらしい条件です。高地で、頂上付近は雲より高いため、1年を通してほとんどの夜、空が晴れているんです。