还没有人找到方法来计算从地球到行星的精确距离。
No-one had found a way to calculate accurate distances to the planets from the Earth.
我们正试图追踪行星从气态盘到尘埃盘到行星盘而形成的整个历史。
What we are trying to do is trace the entire history of planetary formation from a gaseous disc, into a debris disc, into a planetary disc.
开普勒第二定律,也即面积定律,指出从太阳到行星所联接的直线在相等时间内扫过同等的面积。
The second law, the law of areas, states that a line connecting a planet to the sun covers an equal area over equal periods of time.
Depending on how far the planet is from the Sun and where it's located, you will get the left-hand side.
取决于行星到太阳的距离以及行星的位置,你就能列出等号左边的式子
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