If the Earth-Sun distance were as little as 1 percent larger, runaway glaciation on Earth about 2 billion years ago would have caused the oceans to freeze and remain frozen to this day.
如果地球与太阳的距离再大哪怕1%，大约20亿年前地球上失控的冰期就会导致海洋冻结，并一直冻结到今天。
If the Earth-Sun distance were as little as 1 percent larger, runaway glaciations on Earth about 2 billion years ago would have caused the oceans to freeze and remain frozen to this day.
如果地球与太阳的距离再大1%，大约20亿年前地球上失控的冰期就会导致海洋冻结，并一直冻结到今天。
After reaching about half of the Earth-Sun distance from the Sun, the comet should fade rapidly as it then heads out of the inner Solar System.
到达距太阳半个日地距离之后，彗星会因朝着内太阳系之外急速前进而快速变暗。
But the larger envelope of circumstellar dust extends some 60 billion kilometers into space, equivalent to about 400 times the Earth-Sun distance.
但是拱星四周星尘更大的外壳可以向宇宙延伸600多亿公里，相当于地球到太阳距离的400倍。
By using the Earth-sun distance as his baseline, Copernicus relied upon the magic of geometry to figure out that Jupiter is over 5 times the Earth's distance from the sun!
凭借地球和太阳之间距离为基线和魔术几何定律，哥白尼运算出木星与太阳的距离是地球与太阳距离的5倍。
Calculating this angle would allow astronomers to measure what was then the ultimate goal: the distance of the Earth from the Sun.
计算这个角度可以让天文学家测量地球到太阳的距离，这是当时的终极目标。
The planets, in order of their distance from the Sun, are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto.
按照它们与太阳的距离排列，这些行星分别是水星、金星、地球、火星、木星、土星、天王星、海王星和冥王星。
At that distance, the planet likely receives a bit more solar energy from its star than Earth does from the sun.
行星在这种距离下，吸收的太阳能很可能比地球从太阳得到的更多。
Light falls off exponentially with distance, so a planet that is, say, twice as close to the sun as Earth is would get much more than twice the solar energy.
随着离开太阳的距离增加，阳光强度呈指数级下降，因此一颗距离太阳比地球近一倍的行星所接受到的阳光远远不止地球所接受到强度的一倍。
That might sound confusing - seeing as how the Sun is so much bigger than the Moon, but remember - gravity decreases with distance - and the Sun is much farther away from Earth than the Moon.
听起来可能有些令人困惑——明明太阳是远远大于月球的，但请记住——引力随距离减小——比起地球与月球的距离，太阳遥远得多。
And the distance from the Earth to the sun, we have seen that before I call that the distance from the sun to the Earth is about 150 million kilometers.
从地球到太阳的距离，我们之前看过，我称之为太阳到地球距离，约1亿5千万千米。
It sits fairly close to its star, at 14.5 astronomical units AU; one AU is the average distance between Earth and our Sun.
HR 8799e十分接近其围绕的恒星，它们之间的距离为14.5个天文单位AU；一个天文单位是指地球到太阳的平均距离。
An astronomical unit is the distance between Earth and our sun.
一个天文单位是地球与太阳之间的距离。
One astronomical unit is the distance between the Earth and the sun.
一个天文单位等于地球到太阳之间的距离。
Eratosthenes calculated the distance to the sun in 200bc, having already deduced the circumference of the Earth.
公元前200年，埃拉托色尼在计算地球到太阳的距离时，已经推算出地球的周长。
This three different solar eclipse occurred with the sun, moon and Earth all three of the mutual changes of position, and also decided on the Moon and the distance between the Earth changes.
这三种不同的日食的发生跟太阳、月球和地球三者的相互变化着的位置有关，并且也决定于月球与地球之间的距离变化。
It was over twice the distance of the earth from the sun.
那是地球到太阳的距离的两倍多。
Most planet-formation models predict a “planet desert” within one astronomical unit (or the average distance from the Earth to the sun) of a host star.
大多数行星形成模型预言在主恒星一个天文单位（或从地球到太阳的平均距离）以内会有一个“沙漠之星”。
One astronomical unit is the distance between the Earth and the sun, about 93 million miles (150 million km).
一个天文单位是地球与太阳的距离，大约9300万英里(1.5亿公里)。
One AU is the distance between the Earth and the sun, about 93 million miles.
一个天文单位是地球到太阳之间的距离，大约9300万英里。
The orbit of the brown dwarf is huge, about 2, 500 times the distance between Earth and the sun.
这颗褐矮星的运行轨道相当庞大，大约是地球到太阳距离的2500倍。
At an average distance of 2.8 billion miles (4.5 billion kilometers) from the sun, Neptune takes about 165 Earth years to finish a single orbit.
海王星距离太阳平均28亿英里(相当于45亿公里)，绕太阳转一圈需要165个地球年。
Kepler 22-b lies at a distance from its sun about 15% less than the distance from the Earth to the Sun, and its year takes about 290 days.
“开普勒-22b”与其所在星系母恒星之间的距离比日地距离要短约15%，公转周期约为290个地球日。不过，母恒星所发射出的光能量也要比太阳弱25%。
It was over twice the distance of the earth from the sun.
那是地球到太阴的距离的两倍多。
I watch the solar system, see the earth and the sun to maintain a certain distance, get the appropriate heat and light.
我观看太阳系，看见地球与太阳保持一定的距离，得到适当的热能和光线。
And the earth is just the right distance from the sun.
而地球离太阳的距离是恰到好处。
This would give astronomers a chance to calculate the distance between the earth and the sun.
这将会给天文学家们提供一个机会来计算地球和太阳之间的距离。
One AU is the distance from the sun to the Earth.
一个天文单位就是地球到太阳的距离。
One AU is the distance from the sun to the Earth.
一个天文单位就是地球到太阳的距离。
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