彗星

The cometary study is reviewed briefly in this presentation.

海尔—波普彗星近核研究彗星，C/199

In January 2004, the Stardust spacecraft flew through the coma of comet Wild2 and captured thousands of cometary dust grains in special aerogel collectors.

在2004年1月，星尘号飞船从"怀尔特2"彗星的彗发中穿过并用专门的气凝胶收集器捕获了数千彗星尘埃颗粒。

Much of Cooke's work at NASA involves computer-modeling of cometary debris streams--long rivers of dust shed by comets as they orbit the sun.

库克在 NASA 的主要工作就是用电脑模拟彗星的尘埃流---彗星环绕太阳飞行时抛撒的尘粒形成的"长河"。

This means the atmosphere arrived far later than expected. To confirm that comets contributed to the atmosphere, scientists will need to analyze the krypton and xenon isotope ratios in the cometary samples recently captured by NASA's Stardust mission, says geochemist and lead author Greg Holland, also at Manchester.

同样来自曼彻斯特大学的地球化学家、研究论文的第一作者格雷格·霍兰说，为了证实彗星促进了大气的形成，科学家们需要分析由美国航空航天管理局的"星尘"号航天行动最近获取的彗星样品，分析其中的氪和氙同位素比值。

It was learned that in the world of comets, the most famous is Halley's, and one of the four major meteor showers is from Aquarius, with its parent comet Halley's Comet.

据 介绍，在彗星世界里，最著名的就是哈雷彗星了，四大流星雨之一的宝瓶座流星雨的母体彗星就是哈雷彗星。

Methods Vero cells were cultured with mercury chloride, at the same time zinc sulfate, sodium selenite and zinc sulfate together with sodium selenite were added respectively. The tail length and the rate of the comet cells were measured and calculated.

常规培养vero细胞，通过MTT法制定出氯化汞染毒剂量，与氯化汞同时加入不同浓度的硫酸锌、亚硒酸钠以及硫酸锌+亚硒酸钠溶液，共同培养2 h后采用单细胞凝胶电泳法检测细胞的彗星尾长和彗星率。

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。

Several days before Comet 73P shot across the Ring Nebula,astro-paparazzi Nicolas Outters caught the comet sneaking past M13, the Great Globular cluster in Hercules.

在彗星73P跨越M57前几天，天象摄影家（直译是天文狗仔队——译注）Nicolas Outters 拍下了彗星从球状星团M13附近溜过的图像。M13是位于武仙座的著名球状星团。

Methods A comprehensive method was used for the determination of Comet head center based on gradually increased thresholds in sequential Particle Analysis of Scion Image.

实验方法在对图像分析错误的改进中，本研究采用了以梯度阈值为基础的综合性彗星头中心点确定方法，代替原来计算彗星头中心的固定阈值(80％)方法。

After rounding the Sun and emerging from the solar glare later this month, Comet McNaught could be even brighter.

在这个月底，当彗星离开近日点，麦克诺特彗星将会更亮。

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。