It's possible that several large protoplanets were forming, collided, and stuck together to really kickstart Jupiter's growth.

有能一些大型行星形成、碰撞、聚在一起，随后真正开启了木星成长。

Why would we want to harvest tiny protoplanets?

为什么我们要收获微行星？

Asteroids are essentially little chunks of protoplanet that never made it.

行星本质上是从未形成行星块。

For decades, the thinking has been that four and a half billion years ago a Mars-sized protoplanet smashed into the Earth.

数十年来，人们一直认为是45年前一颗火星大行星撞击了地球。

In this situation, protoplanets in the area surrounding a young star slowly grow out of dust- to large rock-sized solid objects.

在这种情况下，一颗年轻恒星周围区域行星缓慢地从尘埃演变成岩石大固态物体。

For decades, the thinking has been that four and a half billion years ago a Mars-sized protoplanet smashed into the Earth.

几十年来，人们一直认为 45 年前， 一颗火星大行星撞向了地球。

As they got bigger — much bigger — these protoplanets eventually started to grow even faster by drawing in material around them due to their gravity.

随着聚合物变大，这些始行星最终开始通过引力抓住周围物质而成长得愈发迅速。

It divides off the Earth and this colliding rough protoplanet into many different particles and then the evolution of each particle is tracked through the course of the impact.

她把地球和这个碰撞粗野行星分别放入不同粒子，接着不同粒子通过碰撞进行演变。

Scientists call Vesta and Ceres " protoplanets." Mr. Rayman says they were in the process of becoming full-size planets when, in his words, " their growth was terminated."

科学家称谷神星和灶神星是行星。雷曼称，在变成正常行星过程中，它们成长被终止。

Third—a period millions of years later, when these primordial particles began to clump together into protoplanets, while others—such as those that formed Aguas Zarcas —lay low in the cold void beyond Jupiter.

第三个时期——数百万年后，当这些始粒子开始聚集成行星时， 而其他粒子——比如形成 Aguas Zarcas 粒子——则位于木星以外寒冷空洞中。

Ceres is known as a protoplanet, and that means that scientists believe it was in the process of forming, like a full-pledged planet, and its formation was suddenly halted, likely by the tremendous gravity of Jupiter.

谷神星被称为行星，这意味着科学家认为它正处于形成过程中，就像一颗完整行星，它形成突然停止，能是由于木星巨大引力。