有一些还未被美国宇航局近地天体计划发现的小行星，很有可能会撞击我们的地球，一个被称为1950DA的现象很有可能在2880年出现。
None of the objects yet discovered by NASA's Near earth objects program have a high probability of hitting the earth — though one known as 1950 DA will come extremely close in 2880.
在华盛顿的美国宇航局总部的近地天体计划负责人林德利-约翰逊说，如果一颗足球场大小的小行星撞上了地球，其威力可以毁灭一座大型城市。
Lindley Johnson, head of the near-Earth object program at NASA headquarters in Washington, D.C., says an asteroid the size of a football field could wipe out a major city.
科学家们的下一个计划是升级HARPS的硬件和软件，并使用这个仪器在类太阳的恒星周围进行更精细的搜索，去发现是否存在可能支持生命存在的、多岩石的类地球的行星。
Scientists next plan to upgrade HARPS hardware and software and use the instrument to conduct a more refined search of nearby sunlike stars for rocky Earthlike planets that could support life.
据英国《每日邮报》8月18日报道，有一颗小行星正行进在一条会与地球直接相撞的轨道上，为此科学家们计划将航天器发射至这颗行星。
Scientists plan to fire a spacecraft into an asteroid in an effort to prepare for one being on a direct collision course with Earth.
海洋科学计划有地球和行星科学学部和交互生物学部共同提出。
The Marine Science program is offered jointly through the departments of Earth and Planetary Science and Integrative Biology.
欧阳自远称，火星计划另外一个重要目标是，探测地球以外的太阳系，并将其它类地行星的起源与太阳系的形成相比较。
Ouyang said another important goal of the Mars mission was to detect solar systems beyond earth's reach and to compare the origins of earth-like planets with the formation of the solar system.
即使有这样的论断，一家私人公司已经公开发表了要访问这颗小行星的计划，以防止它哪天忽然要撞击地球。
Even so, a private company has just unveiled plans to visit it, in case Apophis does decide to pop in on Earth sometime soon.
目前已探明的近地小行星约有9000颗，其中大部分是地面计划在寻找可能撞击地球的天体时探测到的。
At the moment, about 9,000 NEAs are known, most of them courtesy of ground-based programmes looking for bodies that might one day hit Earth.
注意将来，ESA的有生命的行星计划的这个新策略目的是评价最重要的地球科学问题被处理，岁月来。
Looking to the future, the new strategy for ESA's Living Planet Programme aims to assess the most important Earth-science questions to be addressed in the years to come.
开普勒计划已经发现了大约4500颗系外行星，其他星球都不如452b这般和地球相似。但是詹金斯表示，还有50%的星球是我们没有观测到的。
The Kepler Mission has found around 4,500 exo-planets, although no others as similar to Earth as 452-b, but Mr Jenkins said there were still 50 per cent of planets we cannot yet see.
开普勒计划已经发现了大约4500颗系外行星，其他星球都不如452b这般和地球相似。但是詹金斯表示，还有50%的星球是我们没有观测到的。
The Kepler Mission has found around 4,500 exo-planets, although no others as similar to Earth as 452-b, but Mr Jenkins said there were still 50 per cent of planets we cannot yet see.
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