英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：


请选择你想看的字典辞典：
单词字典翻译
asteroids查看　asteroids　在百度字典中的解释百度英翻中〔查看〕
asteroids查看　asteroids　在Google字典中的解释Google英翻中〔查看〕
asteroids查看　asteroids　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • In Depth | Asteroids – NASA Solar System Exploration
    Asteroids, sometimes called minor planets, are rocky remnants left over from the early formation of our solar system about 4 6 billion years ago The current known asteroid count is: Most of this ancient space rubble can be found orbiting our Sun between Mars and Jupiter within the main asteroid belt Asteroids range in size from Vesta – the largest at about 329 miles (530 kilometers) in
  • Asteroids, Comets Meteors - NASA Solar System Exploration
    Asteroids and comets – and the meteors that sometimes come from them – are leftovers from the formation of our solar system 4 6 billion years ago
  • Make Your Own Awesome Asteroid - NASA Solar System Exploration
    Asteroids are leftover rocky parts of the solar system collisions between asteroids – big and small They tell Some have not changed very much in 4 5 billion years us about the formation and history of the Solar System and some have partly melted Others have completely Some have loose particles on their surfaces while melted and formed iron-nickel core with rocky material others are bare
  • In Depth | Kuiper Belt – NASA Solar System Exploration
    Researchers have found that some near-Earth asteroids are actually burned-out comets, and most of them would have started out in the Kuiper Belt Many comets crash into the Sun or the planets Those that have close encounters with Jupiter tend to be ripped apart or tossed out of the solar system entirely
  • In Depth | Our Solar System – NASA Solar System Exploration
    The planetary system we call home is located in an outer spiral arm of the Milky Way galaxy Our solar system consists of our star, the Sun, and everything bound to it by gravity – the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune; dwarf planets such as Pluto; dozens of moons; and millions of asteroids, comets, and meteoroids Beyond our own solar system, there
  • Planet Compare – NASA Solar System Exploration
    NASA’s real-time science encyclopedia of deep space exploration Our scientists and far-ranging robots explore the wild frontiers of our solar system
  • In Depth | Moons – NASA Solar System Exploration
    Moons – also called natural satellites – come in many shapes, sizes and types They are generally solid bodies, and few have atmospheres Most planetary moons probably formed out the discs of gas and dust circulating around planets in the early solar system There are hundreds of moons in our solar system – even asteroids have been found to have small companion moons Of the terrestrial
  • In Depth | Oumuamua – NASA Solar System Exploration
    Discovery The first known interstellar object to visit our solar system, 1I 2017 U1 ‘Oumuamua, was discovered Oct 19, 2017 by the University of Hawaii’s Pan-STARRS1 telescope, funded by NASA’s Near-Earth Object Observations (NEOO) Program, which finds and tracks asteroids and comets in Earth’s neighborhood While originally classified as a comet, observations revealed no signs of
  • In Depth | Earths Moon – NASA Solar System Exploration
    The brightest and largest object in our night sky, the Moon makes Earth a more livable planet by moderating our home planet's wobble on its axis, leading to a relatively stable climate It also causes tides, creating a rhythm that has guided humans for thousands of years The Moon was likely formed after a Mars-sized body collided with Earth several billion years ago Earth's Moon is the only
  • RPS 3D Viewer - NASA Solar System Exploration
    NASA’s real-time science encyclopedia of deep space exploration Our scientists and far-ranging robots explore the wild frontiers of our solar system





中文字典-英文字典  2005-2009