atopic-rhinitis
发表于 2025-3-30 10:03:06
,Following the Light – Eclipsing Variable Stars, constellation of Perseus. The first person to accurately work out why such dips in light output were being observed was John Goodricke, the remarkable deaf-mute astronomer who worked out the process in 1782.
Nostalgia
发表于 2025-3-30 12:31:16
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ungainly
发表于 2025-3-30 18:02:17
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英寸
发表于 2025-3-31 00:10:26
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LAIR
发表于 2025-3-31 01:20:53
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生命
发表于 2025-3-31 06:39:44
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相反放置
发表于 2025-3-31 12:25:23
Observing Variable Stars with Binoculars, good pair of binoculars rather than a cheap telescope. Binoculars are monetarily cheaper than a telescope. Even better, they can be used in the day as well as the night, whereas a telescope for astronomical use does not have this advantage.
伪书
发表于 2025-3-31 16:26:30
Rotating Variable Stars,blemished, and this led over the next two centuries to speculation regarding the nature of some variable stars. Did they vary due to star spots? Was their rotation similar to that of the Sun? Indeed, do other stars have spots, and if so, are the mechanisms that cause them similar to those of our own Sun?