Far from the sun, in the outer solar system, beyond Jupiter's orbit, temperatures are low enough to permit ices to form out of water and out of gases like methane and carbon dioxide.
在远离太阳的外太阳系，在木星轨道之外，温度低到足以使冰从水以及甲烷和二氧化碳等气体中形成。
There's probably no intelligent life in the outer solar system.
也许在外太阳系根本没有智慧生命的存在。
There's probably no intelligent life in the outer solar system. But it couldn't hurt to check.
也许在外太阳系根本没有智慧生命的存在。不过探索一下总归无妨。
Eris is real, but it is a dwarf planet similar to Pluto that will remain in the outer solar system; the closest it can come to Earth is about 4 billion miles.
行星厄里斯是真的，但它是一个和冥王星类似的矮行星，将继续待在太阳系外围；它最接近地球的位置有大约40亿英里。
Unlike earlier missions to the outer solar system, Juno is powered by sunlight, not plutonium.
不同于早前探索外太阳系的任务，“朱诺号”的动力来自太阳光，而非钚。
Because the rings are almost pure water ice-and material in the outer solar system is generally an ice-rock mix.
因为土星环几乎纯粹由水冰构成-而外太阳系的物质构成通常是冰岩混合物。
Comets are rich in volatile material. It suggests that comets should form and keep for a long time in the low temperature region of the outer solar system.
彗星富含挥发物，这表明它们形成并长期保存于太阳系外部低温区。
Over the last few decades, powerful new ground and space-based observatories have completely changed previous understanding of the outer Solar System.
在最近几十年里，新的强大的地面和空间观测站完全改变了人们以前对外太阳系的理解。
Over the last few decades, powerful new ground and space-based observatories have completely changed previous understanding of the outer Solar System.
在最近几十年里，新的强大的地面和空间观测站完全改变了人们以前对外太阳系的理解。
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