日食是月球绕地球旋转到太阳和地球中间时,太阳、月球、地球三者排成一条直线,月球挡住了射到地球的太阳光,月球身后的黑影正好落到地球上,这时就会形成“日食”现象。
日食又分为日全食,日环食和日偏食。日全食的发生是因为太阳靠近月球轨道与地球轨道的的一个交点,而同时月球在距此点的最近的点上。发生日环食是因为太阳靠近月球轨道与地球轨道的的一个交点,而同时月球在距此点的最远的点上。当月球运行到地球与太阳之间时,被月球阴影外侧的半影覆盖的地区,所见到的太阳的一部分被月球挡住,就是日偏食。
2008年8月1日,我在张掖地区有幸观赏到了这一罕见的天文奇观。我们的观测点位于张掖西北面,
18时19分,可以看到太阳的右侧产生了黑色的小点,这时月面的东边缘与日面的西边缘相外切,此时就称为初亏,也就是日食过程开始的时刻,这个过程一直持续了56分钟。这期间太阳的形状在逐渐变化,由原来的圆形渐渐变成了月牙形,而且月牙的形状变得越来越“苗条”。
19时16分,太阳的右侧已经完全被遮盖,只留下西北角的一丝细微的光,这时月面的东边缘与日面的东边缘相内切,太阳的圆面被遮住,强度和热度也显著下降,此时就称为食既。紧接着,太阳的圆面被全部遮住,只能看到周围的一圈光环,而光环的亮度与满月差不多,这一圈光环就是日冕。这整个现象就是食甚,也就是日全食中最神奇、美妙的地方。食甚出现的时间只有45秒,却是短暂而美丽。在这期间,我有幸看到了许多亮点出现在太阳的东南角,这就是所谓的“贝利珠”。 “贝利珠”是月球即将完全遮住太阳时,月球轮廓边缘的环形山缺口透过的阳光形成的。那一个个晶莹的亮点有如珍珠一般,剔透莹亮。食甚出现的时候,天色也暗了下来,好像太阳落山了一样,周围都是黑漆漆的,真的如同进入了黑夜。
随着时间的推移,日食也在继续进行着。19时17分左右,太阳的东部逐渐产生亮光,天色也变亮了些,出现了古人所说的“天再旦”。此时月亮继续往东移动,当月面的西边缘和日面的西边缘相内切的瞬间,称为生光,它是日全食结束的时刻,原来在日全食时可以看到的色球层、日珥、日冕等现象迅即隐没在阳光之中,阳光重新普照大地。
生光之后,月面继续移离日面,太阳被遮蔽的部分逐渐减少,当月面的西边缘与日面的东边缘相切的刹那,称为复圆。这时太阳又呈现出圆盘形状,整个日全食过程就宣告结束了。
日全食的出现,帮助人类解决了许多天文、物理方面的课题,同时这种罕见的天文奇观更是加强了我们对于自然界的爱好以及天文学的兴趣,是不可多得的宝贵资料,也是人生当中无价的财富。
When the solar eclipse is in the center the moon to round the Earth to revolve the sun and the Earth, the sun, the moon and the Earth threes line up into a straight line, the moon held up to shoot a permafrost the sun light, the moon after death of the dark shadow at the right moment fall on the earth, will form "solar eclipse" phenomenon at this time
The solar eclipse is again divided into the whole foodses in day, day wreath food and day partial eclipseThe occurrence that the day all eats because the sun closes to the moon orbit and the Earth orbit of of one hand over a point, but the moon is recently in being apart from this and ordering in the meantimeTake place the wreath food in day because the sun closes to the moon orbit and the Earth orbit of of one hand over a point, but the moon is farthest in being apart from this and ordering in the meantimeWhen the moon circulates an of the Earth and the sun, is copied the region of overlay by the moon shadow outward half, a part of the sun seen is held up by the moon, is a day partial eclipse
On August 1, 2008, I appreciated this rare astronomy spectacular sight at lucky Zhang Yi regionOur prognosticate a point to be located on Zhang Yi northwest side,
At 18:19, can see the solar right side produce black of a little bit small, the east good luck of the month noodles and the west good luck of the day noodles mutually and outside slices and is called early Kui at this time at this time, is also a solar eclipse process beginning of time, this process had been keeping on for 56 minutesThe shape of the sun is changing gradually this period, is gradually become a crescent moon form by the original circular, and the shape of crescent moon becomes more and more"slender"
At 19:16, the right side of the sun has already completely been covered up, a silk that leaves northwest smallly and only, at this time the east good luck of the month noodles and the east good luck of the day noodles mutually inside slice, the circle of the sun the noodles is covered, strength and heat also show Zhao to descend and is called food at this time sinceClose behind, the circle of the sun the noodles be all covered, a turn of aureole that can see surroundings, but the bright degree of aureole is as just about as full moon, this aureole is a corona of the sunThis whole phenomenon is very a food, are also all of the days to eat medium the most miraculous and wonderful placeTime that the food very appears only has 45, but is brief and beautifulIn this period, I was lucky to see many a little bit bright appears in the southeast of the sun, this is so-called"shell benefit bead"When"shell benefit bead" was the moon to completely cover the sun, the wreath form mountain indentation of the moon outline edge through of the sunlight formedThat the radiant little bit bright like pearl is general, the extremely keen Ying is brightAs food is very appearing, , the color of the sky is also dark to come down, seem the sun fell mountain similar, the surroundingses are all pitch dark, really like got into dark night
Along with horary of change, the solar eclipse is also continuing to carry onAround 19:17, the sun of eastern gradual creation glow-in-the-dark, the color of the sky also became bright and appeared "sky again Dan" that the ancients saysThe moon continues to eastwards move at this time and be the west good luck of the month noodles and the west good luck of the day noodles mutually inside slice of moment, be called to living light, all of its that days eat the time of be over and originally eat in all of the day can the color ball phenomenons, such as layer, solar prominence and corona of the sunetc seeing are fast namely concealed have no in the sunlight, sunlight the Pu shine on the earth afresh
After livinging light, the month noodles continues to move the noodles of leaving the day, the sun drive cover of part gradual decrease, in a flash be the west good luck of the noodles and the east good luck of the day noodles in month to mutually slice, be called to reply a circleThe sun presents a disk shape again at this time, all of the whole days ate process to announce to end
The emergence that the day all eats helped mankind to solve a many astronomies, physical topic, this kind of rare astronomy spectacular sight strengthened our interest in a fondness for of nature and the astronomy more in the meantime, is can not much get of the precious data is also an in the middle life invaluable wealth
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gEqAjDtPiwjYCk4B8KaJzj8kvfZ+KX73CPyiurYGgQawIdPfm4ieDiTTNxLf6Yoml6tXZmi7Zf5JgTqE4X4aAcnC3fWcsSYQOQPdQQsNCrVMcGk5KiBokbN5gAcKQkMB3rgj3qGbWqCy1gKM752nnvOh8pmNG3ObGoFIh9DRnwYdUdOz2V3iaxeTFRKkRAmGn6T94+BcRQqnL+aTmfuE4p45xFdnqpfup+OLfkttEVShigTKyMPo+3T8ZTr5a0G+di0oeGAIGRAR9D0nYcz3mbRyjPRbsbsB1HN0eAMDDDg/5XxeKHeG5wNtRw4dbwRoHlYnB2mZ1+aqb+fC8rleKq0/IZo/0bcBxYbrFPUzlDVZIdHU0dKW0X4lZu87iMwid0ByuBQAK+VbYlgdNf8RvZi9KvpfyD8UJawU3Ju6+dp3JjiiG3FjqN4BoPtvef63PArxm000U3rRXD9eVtaGIW3i/l+oaF6eTAeHi1aP33Cl7Q1OMzK7jF/UPwOiDj0QFB0xuIL7jg/tIRqe11KUIaChIM4hOHxmmgE3GV8MDx7d2rDUFFTQ2MBb5UjrQc+UFHWJkf8oVNbjhHOS0z6IIJx1zveOLXEaQVlG3QdT44Il4qLagsRIwahxzEsB7ZAx6p9ikiCmuVULWwFD8CsUSq1a6r7wzFKc2rK4KTSBpu223E6S4hdVjqEWWVv0ualLa2l/2IBe6A1mqi6+DLu3shJiDwEIUWOVpiMXXmLBM9QaR1K4wPelaUsRjwjo8Sga2qMONRFJvlBTliA2g1NRApcgva6JI6AC+O18atiQLYFAFrJpo5VQ+hyXtEHn+X4LdtKZnWRALQBDgt0YW6ChVEwhPqnc0H5Jbj4QT27Agz0ZVdRkadoPGh8ND24TTbT7jrINdOVguHRPJJ5DxiIcwD5QrDX1rSkVDachQvkOq0TBcsgUBDY1Gf1kZP4NvyBaxUi8gkv6TisqF6AdM8QvyPwbrUWkE6kBToZ0aWV/12TGYr5NR9tjmCudRChqh98mVY4ODwhW3z0xdJANFZFqOduwe5YsvqoOLVQvzye3psNz5aMHtgE4OrkB96NaST9jWE5lCACBB3lnfYzRWQZMjba4DO2aZJAH69LskJGUQ7VEtNQaJvnvE4Q4FCIUBrSAC1yzyIbcavG1t6DCxV48dEH1xlplaSgZGswmT+xz8mK6dqOyfDEeugYATAcvx6MfUc6Ld1Gv4M1oQTo5NR2gphBR9C1oxQey3lZVDKQTQYjSTBt5xX4LGJTF5CUAkkmRkyaB2k0t14A2OInLNGd31nlLHl/HgsLj5XLnNn5gyDLauTHUw/VsjUKO4IOTZOE+IqnPRdskBMlAr8y2pOgk6Ud4keW7BExQXwfApuhUim/Qa0lnA7Ti0jqOHCyqjO8ykNkxV+iB6QHfdx2K7o1nUycGMDiSeSGam2/0QvGuzZUIygRup0wJSEm24AZV7y54rYPCgCxTrOCoNHOyBXdkmICZok1DxIt6EmCIwEDVnA5p/zqJluGH0NHntnaBoyJNGzBaICP8iQE8RvrQZaAewgMw6jnBYEAnLSCzqEoCPFHxqdupCSltvt1gGHSzI/YKqKWBGKdpDAAYdVrmDqiuT0YXZqL1O9Gv9+KFd9HyWLy4Ej15lh1sIsuuX4ieEGeBXijsS+dHGNEPqm2tHFoShXkhzAjXUFzpoIHNzYil2oA6NZrOLDBeQDOuAq5p+0jBGxsr/fLjOtgc3RZshKPdQEfViaPgZDvksA7pFO7ZgBQe+ZyCYA2kdNAvmntXUIsEmUeOtoh+nXOXkoKwpQMxRNVgj88NLnRcgSPlUMCClqKa2XpYs4BOVFFVdqp+nsrS0QhEkG+ou4L30k4nQAEuslR67QaMX1mvm71jO7Nv+PqM5snURwsmMXWTQAgisLjRWuo6sCIFPaZB3jlZv0x1lXCZggB2NE2dxPjeTB1tO7ZD209b5HPgYMsWcfX9AIhnpgXhOaOmT7G5D60gvFaEkrQ83yYQdKAMAGMx3nqZ39hcHbpWN8mZvy2TiAa9iOWB8wN+KIVk0SESFjWC9utJ7Sgmi3yiRqWFwJC0t9J8sia9846A9PXT+PZg2Hvu8E+7NEn12XS02pfpMAr/16vJ9SvR0Eg81JdO9dFaL84kY1fp+uunu1sxtw08RNMpCRQz0G5WHKVCCWJ0hE7TPo0yxakZRtwXDISAhU46yg1LXmxY8rFTv69FN+hPOqLjQGxQIsCBRMNRPkeMBb7WtI9dNAgZ/XPgqJ75y122Bbp+amgL7Nv5IPaf239s76BPT+x4ELuz63Rn+estDmM3jTxWLnf3HOotnzhWfEBmm0lkH6Np/DzC39LQFk67nz7V3XW649/82fstPk6xwXydbeXysR/bd2VA2fr81e9p6M4G7Dj6H20d9FEsOn1vtvnYSHMyHD30z6cOn85jdYt7H+k5fQbv+br7RP1TFZB3fleeerTUU27tUxV8V5+q2MUHKoLWP1ARfJ5PU+zb1WbRvl32Lvd9NlBj/8eYFrSeEb+robvGNPaZMO3/rwELTAtaxrMzR8se0PazLzj/wobsH8IdP39Wg7c/tR+uwxvx70D7TXE6FtLw2cftb/Jtz7Fve9pOHWm4k1DAR1L+1JRWO36M7RCy7d/butsb7gA+S7KcO2L/3O50hwM9hw/7z9I130Yb6nzSBrI/RLnjigAR/3jsyPfdbUfaGwvnDp+++3PPwRO99Ydy6phqTfPXUOimtYdugKb8v2NHTqEu/OfRY93tyJSD7fuJ8325b9PlP+AN2ceW9/8vB08ptQ==
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