望远镜需要放置在最佳的观测点。
尘埃温度远不及恒星，所以光学望远镜难以观测到。
Dust is nowhere near as hot as a star, therefore optical telescopes cannot observe it.
上星期，人们用地面望远镜观测到了这一太阳黑子群。
The monster spot came into view of Earth-bound telescopes last week.
我们喜欢在夜晚用望远镜观测星星。
我们喜欢在夜晚用望远镜观测星星。
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