評論
打印
But what's really amazing,is this distortions also explain.
但真正神奇的是這類變形也可解釋
that mysterious force discovered by Newton so many years ago.
牛頓多年前所發(fā)現(xiàn)的神秘作用力
Gravity is the warping of spacetime.
重力就是時空扭曲的結(jié)果
Now,curving space and time may sound tricky wrap your head around.and galaxies.
時空扭曲 聽來可能玄得讓人摸不著頭緒 但一點都不玄
Imagine a boat locked on the straight course across the flat surface of a lake.
想象一艘船鎖定直線航道 正準(zhǔn)備渡過平坦的湖面
A lake that stretches away... Forever.
一座永遠無限延伸的湖
The flat lake is like undistorted spacetime.
平坦的湖面就如同未扭曲的時空
Now imagine a giant hole appears beneath the lake.
現(xiàn)在想象湖面下出現(xiàn)一個大洞
and water begins to drain away.
湖水開始排掉
The lake has become distorted,just as spacetime is by a planet.
湖面因此扭曲 就如時空因行星扭曲一樣
The effect would be to drag the boat towards the hole...
此作用會將船向洞里拉
so that it begins to curve around it.
因此船開始繞著洞周圍航行
Even though the boat is still being driven in a straight line.
即使船本身仍設(shè)定在直線航行
And it's exactly that same effect a massive star or planet has.on spacetime.
這種作用就相當(dāng)于 巨大恒星或行星 對時空產(chǎn)生的作用
It causes spacetime to distort around it,pulling things towards it.
時空會在星體四周產(chǎn)生扭曲 把物體拉向星體
And that's why things fall to earth:Gravity.
因此物體才會墜落地球 就是因為重力
