另一个太阳系有一颗质量是地球22倍的行星(译者：可怜的小地球)，公转周期为4天，还有一颗公转周期为3年的类木星行星。
Another solar system has a planet 22 times the mass of Earth, orbiting every four days, and a Saturn-like planet with a 3-year period.
旅行者2号是唯一一个接近我们太阳系众多神秘行星之一天王星的一艘航天器。
Voyager 2 is the only spacecraft that has flown close by to one of the more enigmatic planets in our solar system: Uranus.
广角红外线探测望远镜需要扫描天域2遍以便生成时间释放图像，天文学家将用这些图像侦测外太阳系的天体。
WISE needs to scan the sky twice in order to generate the time-lapsed images astronomers use to detect objects in the outer solar system.
美国宇航局(NASA)的“朱诺号”探测器将于周一抵达木星。随着这一天的临近，其他很多双眼睛也在盯着太阳系最大的行星木星。
AS NASA's Juno spacecraft closes in for its Monday arrival at Jupiter, many other eyes are also staring at the solar system's largest planet.
通过对望远镜视野之内的156,000个目标恒星的观测，在43天的时间里发现了706个体积介乎地球和略大于木星之间的太阳系外行星。
Of the 156,000 target stars in the telescope's field of vision, the 43 days of observations found 706 possible extrasolar planets from Earth size up to a bit bigger than Jupiter.
玛雅人非常意识到太阳系是365天，但选择去向数字360请愿。
The Maya were well aware that a solar system is 365 days but chose to memorialize the number 360.
每一天，我们都从我们的高度观察整个太阳系。
Each day we observe you from our vantage points located throughout the solar system.
建造冰天的目的是阻挡地球受到太阳射线和其他穿越太阳系的危险的宇宙射线。
This was done to protect planet Earth from the radiation of the Sun and other dangerous cosmic radiation that regularly come through the solar system.
为期七天的调查发现在2006年之后被称为人马座窗口吞噬在外太阳系行星搜索(扫)。
The discovery followed a seven-day survey in 2006 called the Sagittarius Window Eclipsing Extrasolar Planet Search (SWEEPS).
由于某些类星体在不到一天的时间里明显增亮或变暗，其产能区应该不会比光一天行进的距离长，即约为我们太阳系的大小。
Because some brighten or dim significantly in less than a day, their energy-producing regions must be no larger than the distance light can travel in a day - about the size of our solar system.
有一天，一切都被改变了…太阳系附近发现一个未知的能量爆发。
One day, that was all to change…An unknown energy burst is detected near the Solar System.
新地平线打响了探索太阳系边疆的第一炮，而在今天美国东部时间早上6点，在发射了78天后它成功跨越了火星轨道。
New Horizons' trailblazing journey to the solar system's outermost frontier took it past the orbit of Mars today at 6 a. m. EDT , 78 days after the spacecraft launched.
水星位于太阳系中离太阳最近的行星。 在所有太阳系的行星中它一天时长最长，一年当中天数最短。
Mercury, the innermost planet, has the shortest year yet the longest day of any solar system planet.
水星位于太阳系中离太阳最近的行星。 在所有太阳系的行星中它一天时长最长，一年当中天数最短。
Mercury, the innermost planet, has the shortest year yet the longest day of any solar system planet.
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