食既:太阳与月球第一次内切,太阳光球刚完全被月球掩蔽的时刻 。食甚:月球中心与太阳中心距离最小的时刻 。
生光:太阳与月球第二次内切,太阳光球刚从月球西面露出来的时刻 。复圆:太阳与月球第二次外切,太阳光球刚完全离开月球背后的时刻 。
初亏、食既、生光和复圆又分别称为第一、第二、第三、第四接触 。翻译:The so-called "food" is a celestial body that was another celestial body or its Heiying Yanzhe all or part of the astronomical scene. Ri Quansi main solar eclipse, the partial eclipse and three on the Environment and Food. The principle is the solar eclipse occurred on Earth, some areas were covered by the shadow caused. Shuori solar eclipse will occur in that first day of the Lunar New Year (New Moon). This is because only in that day, the moon will appear in the Sun and the connection between the Earth, so will it be possible to block the sun and the moon formed the solar eclipse. Similarly, the eclipse will appear in Wangri that the Lunar New Year 15. You might ask, why is not the first day of each month will be a solar eclipse, why not the 15th of each month will be a penumbral eclipse ? This is because in addition to the above conditions, the impact of the solar eclipse and the eclipse there are other factors. We the Earth around the sun to the track known as the ecliptic, the moon around the Earth to the track known as the White Road. Ecliptic plane and white plane, not the same, among them an average of 5 ° 09 'angle, and always changing. Only when the moon to run, and yellow or white Road intersection near the intersection and down only when a solar eclipse. The type of solar eclipse A total solar eclipse of three, namely: the partial eclipse, on the Environment and Food and Riquan Shi. The moon covered the sun is part of the partial eclipse. Moon only cover the central part of the sun, the sun also exposed a circle around the face, seems like a halo called on the Environment and Food. The sun is completely covered Riquan Shi. This three different solar eclipse occurred with the sun, moon and Earth all three of the mutual changes of position, and also decided on the Moon and the distance between the Earth changes. The moon was much smaller than the sun 。
3.谁帮我用英语介绍一下日全食A solar eclipse occurs when the moon passes between the Sun and the Earth so that the Sun is fully or partially covered. This can only happen during a new moon, when the Sun and Moon are in conjunction as seen from the Earth. At least two and up to five solar eclipses can occur each year on Earth, with between zero and two of them being total eclipses. Total solar eclipses are nevertheless rare at any location because during each eclipse totality exists only along a narrow corridor in the relatively tiny area of the Moon's umbra.
A total solar eclipse is a spectacular natural phenomenon and many people travel to remote locations to observe one. The 1999 total eclipse in Europe helped to increase public awareness of the phenomenon, as illustrated by the number of journeys made specifically to witness the 2005 annular eclipse and the 2006 total eclipse. The recent solar eclipse of January 26, 2009 was an annular eclipse, while the solar eclipse of July 22, 2009 was a total solar eclipse.
In ancient times, and in some cultures today, solar eclipses have been attributed to supernatural causes. Total solar eclipses can be frightening for people who are unaware of their astronomical explanation, as the Sun seems to disappear in the middle of the day and the sky darkens in a matter of minutes.
这是我从英文新闻中复制的,不过给你解释一下,观测方法似乎没有写:
日食发生在月亮经过太阳与地球中间之时,日食过程中,太阳光被月亮部分或全部的遮盖 。每年全球发生2到5次日食但最多只有两次为日全食 。不管在什么地方,想要观测到日全食都是非常困难度,因为在日全食只能在月亮投到地球的影子当中才能看到,而这个影子之时很小的一条区域 。
- 全抛瓷片专利怎么写
- 王羲之的行书雅字怎么写
- 沸洋洋的英语名字怎么写
- 飞字草书用钢笔怎么写
- 敬师礼小报怎么写
- 忡字印章篆体怎么写
- 关于秋天的风300字怎么写
- 黄金梨400字作文怎么写
- 企业换证书面申请书怎么写
- 绿豆长出的草叶子怎么写