小行星

The estimate is 10 times smaller than one estimated by Kyte et al.(1988),but it is close to the realistic situation of the Eltanin impact event,and it is a more reasonable lower limit estimation on...

这比Kyte 等人（1988）估计的质量小了10 倍，然而它更接近埃尔塔宁小行星撞击事件的实际情况，可以作为埃尔塔宁小行星质量下限和半径下限更合理的估计值。

Star gazers can find Nadal's asteroid between Mars and Jupiter and the 22-year-old has himself been invited to the Majorcan observatory to view it himself.

今年22岁的纳达尔也应邀前往马略卡观测台亲眼观测这颗以他名字命名的小行星。"纳达尔"小行星位于火星和木星之间。

This minor planet, serial number 3998VA, is orbiting in the asteroid belt lying between Mars and Jupiter. It's one of more than 30,000 similar minor planets. It is 2 kilometers in diameter and is moving at a speed of over 6 kilometers per second.

这颗小行星编号是三九九八VA，是在火星与木星之间的椭圆形轨道上运转的，也是三万多个这类小行星中的一个，它的直径是二公里，每秒行进速度为六公里多。

When there is no trailing of the minor planet image (or you are measuring the middle of a trail) the time of observation is the mid-exposure time. If you are measuring both ends of a trail, then one end is associated with the start of the exposure, the other with the end.

如果你测量的是小行星拖线的中部或该小行星没有明显的拖线，那么你应该使用你暴光时间的中点时刻作为该测量点对应时刻，如果你既测量了起点又测量了终点，那么你应该分别对应的是暴光的起始时间和终了时间。

The Minor Planet Center, which is located at the Harvard-Smithsonian Center for Astrophysics, serves as the worldwide clearinghouse for asteroid and comet observations.

该小行星中心，这是设在哈佛大学史密森天体物理中心，作为世界中心的小行星和彗星的意见。

According to the evolution theory of the solar system, the planets were formed from collapse of the planetesimal clouds. The asteroids, occupying the transition region between the rocky terrestrial planets and the outer gas giants with special configuration, underwent the collision evolution process.

按照太阳系的行星由星云塌缩而成的演化理论，对在太阳系中处于特殊位置和具有特殊存在形态的小行星的物理参数的研究，可以为太阳系早期演化条件提供证据；为小行星碰撞演化研究提供边界条件。

In brief, may say that, the planetoid and Earth's rise and fall is closely linked, therefore studies in solar system's planetoid to say to our group or is all has the extremely important research significance to the Earth.

总之，可以说，小行星和地球的兴亡息息相关，因此研究太阳系内的小行星对我们小组来讲或者是对地球都是具有十分重要的研究意义的。

Astronomers announced the discovery of a new planetoid in the Kuiper Belt, an asteroid belt located in the outer fringes of our solar system.

天文学家宣布，他们在太阳系外缘的小行星带"柯伊伯带"中发现了一颗新的小行星。

Launched in 2007, the Dawn satellite is due to rendezvous with the large Vesta asteroids and with Ceres, the largest planetoid in the asteroid belt.

在2007年推出的"曙光"卫星目的是会合小行星灶神星和小行星带中最大的一员谷神星。

After the statistics, to the beginning of 1990s, the planetoid which registers had more than 4000, although but also some multitudinous planetoids (had more than 50 ten thousand according to record) already to discover, waited for actually further confirmed.

经统计，到20世纪90年代初，已登记在册的小行星就有4000多颗，还有众多的小行星（据记载有50多万颗）虽已经发现，却有待进一步证实。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了