一再
发表于 2025-3-21 18:16:32
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摘要记录
发表于 2025-3-21 22:08:04
Our Nearest Star,stribution of stars in the sky, astronomers have found that the Sun is located in the Orion Arm, a small, partial arm populated by stars, gas and dust which is located between the Sagittarius and Perseus arms of our Galaxy (Fig. 2.1).
abstemious
发表于 2025-3-22 02:54:17
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小争吵
发表于 2025-3-22 07:05:52
Crewed Missions Involved In Solar Studies,pters. Although the most important observations and scientific breakthroughs have come from orbiting solar observatories (see Chapter .), some key contributions have come from space-based instruments – notably Skylab’s solar telescope – that have required human intervention.
成份
发表于 2025-3-22 12:14:27
Other Solar Observing Missions,factors that influence the relationship between the Sun and Earth. Many of the missions carry a diverse suite of instruments, only some of which are solar related. Many of them carry instruments designed to measure solar irradiance, a measure of the amount of solar radiation that reaches Earth.
蜿蜒而流
发表于 2025-3-22 13:43:06
charts, and other visual content.Includes nontechnical desc.This is the story of humankind’s quest over centuries to learn the true nature of the most dominant object in our Solar System: the Sun..Award-winning science writer Peter Bond describes in detail how our ideas about the Sun have changed o
圆柱
发表于 2025-3-22 18:56:15
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Ointment
发表于 2025-3-22 21:15:32
Getting To Know The Sun, with varying speeds against the background of ‘fixed’ stars. In order of greatest apparent brightness, they were the Sun, Moon, Venus, Jupiter, Mars, Mercury and Saturn. The ancient Greeks called them “planetes” (“wandering stars”), a designation we still use for all but the Sun and Moon.
别名
发表于 2025-3-23 02:29:51
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Flounder
发表于 2025-3-23 06:52:50
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