Much too small to generate the strong gravitational field needed to retain an atmosphere.

太小而没有足够大引力无法维持大气。

Think of the Sun with its gravitational field 28 times stronger than Earth's.

考虑到太阳的引力场比地球的大 28 倍。

So this is the gravitational field on Neptune and you feel, you know what?

这就是海王星的引力场，要说我感觉怎么样？

He's right. It's going to create a gravitational field that'll consume everything around it.

他说得对，黑洞会制造出引力场，把周围的一切都吞噬进去。

Juno took measurements of Jupiter's gravitational field, which scientists use to more deeply analyze the planet.

朱诺测量了木星的引力场，科学家们用它来更深入地分析这个星球。

They're extremely dense, with such strong gravitational fields, that not even light can escape their grasp.

黑洞的密度极高，引力场极强，连光都无法从其视界逃脱。

This is an object that is so massive and dense that not even light can flee its gravitational field.

黑洞是一个很庞大，密度很高的物体，甚至连光都无法逃脱它的引力场。

Understand the electromagnetic and gravitational fields of the planet.

了解行星的电磁场和引力场。

That means it has a very strong gravitational field, which also means it can hold on to a lot of moons.

这意味着它有很强的引力场，也意味着它可以抓住很多卫星。

This, together with measurements of Titan's gravitational field, have scientists thinking that Titan may have an underground ocean of liquid water.

再加上对泰坦引力场的测量，科学家们认为土卫六可能有一个地下液态水海洋。