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Titlebook: How to Observe the Sun Safely; Lee Macdonald Book 20031st edition Springer-Verlag London 2003 Astronomy.Observational.Sun.Sunspot.solar

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发表于 2025-3-21 19:54:18 | 显示全部楼层 |阅读模式
书目名称How to Observe the Sun Safely
编辑Lee Macdonald
视频video
概述Written for amateur astronomers.Concentrates on the practical aspects - what equipment to buy, and how to use it.An ideal practical companion for Chris Kitchin‘s Solar Observing Techniques
丛书名称The Patrick Moore Practical Astronomy Series
图书封面Titlebook: How to Observe the Sun Safely;  Lee Macdonald Book 20031st edition Springer-Verlag London 2003 Astronomy.Observational.Sun.Sunspot.solar
描述The Sun is the brightest and most accessible object in the sky, and it has much to offer the amateur astronom er with modest equipment. On most days it shows sunspots and other features that displaya wealth of fine detail and change their appearance strikingly from day to day. But observing the Sun can be dangerous. NEVER look at the Sun through a telescope or other optical aid, even for a brief instant. The Sun‘s intense radiation, amplified and focused by a telescope, will almost certainly cause eye injury and could weIl lead to complete blindness. Do not attempt any solar observing until you have read and understood the safety precautions and observing advice set out in Chapter 2 of this book - even if you think you have the correct equipment. Be especially wary about using filters to observe the Sun. If you have a filter that makes the Sun look dark, it is not necessarily safe, as it is largely the Sun‘s invisible radiation that is harmful to the eye. But provided you use the correct techniques, such as projecting the solar image onto a screen or using a specially designed, quality solar filter that fits over the telescope aperture, it is quite easy to observe the Sun safely.
出版日期Book 20031st edition
关键词Astronomy; Observational; Sun; Sunspot; solar
版次1
doihttps://doi.org/10.1007/978-1-4471-0053-9
isbn_ebook978-1-4471-0053-9Series ISSN 1431-9756 Series E-ISSN 2197-6562
issn_series 1431-9756
copyrightSpringer-Verlag London 2003
The information of publication is updating

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Solar Drawings and Position Measurements,tatistics, as I shall describe in Chapter 5. Photography and CCD imaging are in theory more accurate than drawing, but they are less practical, for several reasons. It is not as easy to define the cardinal points (north, south, east and west) on a photographic image as accurately as on a good drawin
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Measuring Solar Activity,t done by counting the number of sunspots and/or sunspot groups visible on the Sun’s disc each day. Other methods of measuring solar activity are used by professional observatories, but counting is the only one that is practical for the amateur. Sunspot counts are very useful in monitoring the Sun’s
发表于 2025-3-22 08:45:16 | 显示全部楼层
Observing the Sun in Hydrogen-Alpha,housand kilometres thick, and the corona, which consists of rarefied but extremely hot gas extending millions of kilometres out into space. Both layers are invisible to the Earth-bound observer in ordinary circumstances, because the brilliant light of the photosphere is scattered by the Earth’s atmo
发表于 2025-3-22 14:06:40 | 显示全部楼层
Solar Photography,ugh, as I have explained in Chapter 4, it is very difficult to do accurate positional measurements using photographs. Nevertheless, photographs of the Sun’s full disc are excellent for showing what was visible on the Sun on a particular day and show the appearance of the Sun’s features far more real
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per airway palate surgery, published between January 2001 and February 2018 were included. All adult OSA patients, with documented airway evaluation methods and absent hypopharyngeal collapse. Post-operative outcomes measures included success rates of treatment, AHI, Epworth scale, QOL, and snoring
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Lee Macdonaldsurgery remains the paragon among various sleep surgeries and is the most commonly used surgery for OSA. During past decades, palatal surgery has evolved from the traditional UPPP, minimally invasive palatal surgery, to a functional reconstruction of the lateral pharyngeal wall and soft palate. The
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