Closer inspection by NASA's Hubble Space Telescope reveals that these spots are actually a rare alignment of three of Jupiter's largest moons - IO, Ganymede, and Callisto - across the planet's face.
美国宇航局的哈勃太空望远镜近的距离观察发现，这些斑点实际上是横跨在木星表面上，很少见到的3个最大卫星(木卫1，木卫3，木卫4)的直线排列。
Seriously, I noticed Polaris seems out of alignment just last night! My son and I had out his telescope. I thought I was imagining things.
就是在昨天晚上，我注意到北极星看起来严重地不准了！我的儿子和我拿出了天文望远镜，我以为是我自己的想象呢。
In this paper, the principle and procedure of alignment of Cassegrain and coude optical systems for 2.16m astronomical telescope are described.
叙述了2.16米天文望远镜卡焦及折轴光学系统的调整原理与具体步骤。
In this paper, the principle and procedure of alignment of Cassegrain and coude optical systems for 2.16m astronomical telescope are described.
叙述了2.16米天文望远镜卡焦及折轴光学系统的调整原理与具体步骤。
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