彗星

He recalculated the orbits of other unclassified SOHO comets and found four more.

他重新计算了其它未归类的SOHO彗星轨道，又发现了4个类似的彗星。

Zhou took great interest in astronomy beginning in 1979, when he was only 14 years old. On 1983 May 11, after observing the comet C/1983 H1 (IRAS-Arski-Alcock), he transferred his efforts to comet searching and observation. Before 1989 June 22, Zhou used a 55-mm-diameter (25x) aerological theodolite to search for comets.

周兴明先生兴趣天文始于1979年，他14岁。1983年5月11日，他第一次看到彗星C/1983d(Comet IRAS-Araki-Alcock)后，他将他的兴趣转向彗星的发现和观测。1989年6月22日前，他的寻彗仪器是口径55mm，放大率25x的小球测风经纬仪。

There has also been speculation - but scant evidence - that a brilliant comet seen in 372 BC, which the Greek philosopher Ephorus claimed to have seen tear in two, was perhaps the progenitor of the entire Kreutz system.

对此结论的确有旁证，不过说服力不强——在公元前372年希腊哲学家Ephorus 称他看见了一个明亮的彗星被撕成两半，这可能就是整个Kreutz 掠日彗星家族的鼻祖。

Result:(1)Tau prevented neurons against Mn toxicity of low and middle concentrations. The ideal conditions can reach upon 4. 5 mM Tau added just, nearly no apoptosis cells could be detected.(2)The percentages of apoptosis intogether were lower than those in Mn just , being concentration-dependent relations with Taurine levels.(3)Mn induced DNA damage of neurons with dose-depedent, The higher of Mn concentration, the lengther of the comet tail and the higher percent comet-like cells. Tau incubated could weaken significantly the lesions of Mn towards DNA on the degree.

结果：(1)牛磺酸对中低剂量锰的毒性有一定的拮抗作用，单独加入牛磺酸效果最好剂量是4.5mM，视野下几乎不见凋亡细胞；(2)牛磺酸干预后培养神经细胞凋亡率低于相同剂量的单纯锰培养细胞组，且与牛磺酸浓度呈剂量依赖性；(3)锰引起培养神经细胞DNA损伤，表现在彗星尾长增加，彗星样细胞百分率增加；加入牛磺酸干预后，可明显改善锰造成的培养神经细胞DNA损伤。

NASA's Spitzer Space Telescope captured this image of comet Holmes in March 2008, five months after the comet suddenly erupted and brightened a millionfold overnight.

2008.3，美国宇航局的斯皮策太空望远镜拍摄的霍尔姆彗星图像，在此之前的5个月，这些彗星突然在夜空中出现，爆发出百万倍于原先亮度的光。

Luckily, Phaethon is a rocky comet that has lost all of its ice because of the hot Sun.

很幸运，法厄同彗星是一颗岩石质彗星，它所携带的冰也因太阳而融化消失。

Almost in the centre of it above the Prechistensky Boulevard, surrounded on all sides by stars, but distinguished from all by its nearness to the earth, its white light and long, upturned tail, shone the huge, brilliant comet of 1812; the comet which betokened, it was said, all manner of horrors and the end of the world.

一八一二年出现的这颗巨大而明亮的彗星正位于圣洁林荫道的上方，差不多悬在这片天空的正中央，它的周围密布着繁星，它与众星不同之处乃在于，它接近地面，放射出一道白光，它的长长的尾巴向上翘起来，据说，正是那颗彗星预示着一切灾难和世界末日的凶兆。

One of the many curiosities of Comet Holmes is the lack of a normal comet's tail.

其中的许多curiosities彗星霍姆斯是缺少一个正常彗星的尾巴一样。

Now according to Newtonian theory, some of them moved in hyperbolas or parabolas never to return; others moved in ordinary ellipses.

现在，牛顿理论认为，有一些彗星沿双曲线或抛物线运行，永远不再返回；另外一些彗星沿普通的椭圆轨道运行。

ZetaTalk Prediction 2/22/2003: We anticipate NASA will explain the Planet X complex as any number of things, or rather their lackeys, who will natter the word on every Internet or media source that allows their nattering - asteroid bunch, passing comet, unusual comet, or whatever.

齐塔人之声&预测&2003年2月22日：我们预期NASA会将行星X的综合体解释为许多东西，或者他们的阿谀奉承者会在每一个允许他们胡扯的网站或媒体渠道上大放厥词，说这些是小流星群，通过的彗星，罕见的彗星之类的东西。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。