So now I will put in the mass of the Earth here.

这样我就又考虑，到了地球的质量。

youdao

You substitute in there the mass of the Earth, which is six times 10 to the 24 kilograms.

这里用,地球的重力替代，≈6乘以10的24次方。

youdao

Well, that's completely trivial, you would say, because it is one-half * of the mass of the Earth times the orbital speed squared.

也许你会说，这是，完全没有意义的,它等于1/2m地,轨道速度的平方。

youdao

Other is gravitational mass, which is the measure of how much you're attracted to the Earth.

另一个是引力质量,它可以用来衡量地球对物体引力的大小

耶鲁公开课 - 基础物理课程节选

You cannot tell the mass, because what you are doing now is appealing to the notion of mass as something that's related to the pull of the Earth on the object.

你无法测出质量,因为你现在所做的是把质量,用地球对物体的引力给替代了

耶鲁公开课 - 基础物理课程节选

It has five times the mass of the Earth and orbits its star every 13 days.

ECONOMIST: Is there anybody out there?

They say they have strong evidence for another planet in the same system that has about eight times the mass of the Earth and orbits every 84 days.

ECONOMIST: Is there anybody out there?

Dr Marcy suspects that his new discovery, which has about 45 times the mass of the Earth, is composed of a rocky core surrounded by a thick envelope of hydrogen and helium gas.

ECONOMIST: Extrasolar planets