地球的力量 第5集 稀有行星(16):巨大的萬(wàn)有引力

Jupiter is more than three hundred times biggerthan Earth,

木星比地球大300多倍

so it has a massive gravitational field.

所以它具有巨大的萬(wàn)有引力

This attracts dangerous flying objects that mightotherwise hit Earth.

這會(huì)吸引危險(xiǎn)的飛行星體否則就會(huì)向地球飛來(lái)

Jupiter is Earth s protector.Scientists have even seen it in action.

木星是地球的保護(hù)神 科學(xué)家甚至親眼見(jiàn)到過(guò)

In the early 1990s,a comet was captured by Jupiter's powerful gravity.

在20世紀(jì)90年代初 一個(gè)彗星被土星巨大的引力捕捉到

It broke up into many different pieces,which smashed into the planet.

它碎成了許多片 撞到了土星上

Some of the blasts left scars as big as Earth itself

有些爆炸留下的痕跡和地球一樣大

Without Jupiter, it's likely Earth would have been pummelled

沒(méi)有土星，地球可能會(huì)每隔一萬(wàn)年

by huge impacts like this e very 10,000 years or so.

就受到一次這樣的沖擊

Under that kind of bombardment,it's hard to imagine how complex life could ever have gotgoing.

在這樣的轟炸下 很難想象復(fù)雜生命可以延續(xù)

Any planet that's to be a home to complex life needs liquid water,

任何星球想產(chǎn)生復(fù)雜生命都需要液態(tài)水

a sun that doesn't burn out too quickly and a giant neighbour to protect it from meteorites.

太陽(yáng)不會(huì)很快蒸發(fā)它 有個(gè)巨大的鄰居保護(hù)它不受隕石侵襲