His calculations suggest Nemesis is between 3 to 5 times the mass of Jupiter, rather than the 13 Jupiter masses or greater that some scientists think is a necessary quality of a brown dwarf.

他的计算认为“复仇者”应该介于3 - 5倍木星质量，而不是某些科学家认为的13倍木星质量或者更大质量以达到形成褐矮星的必要质量。

youdao

Combining the measured velocity with the relative masses, they can calculate the mass of the star directly.

结合群众的相对速度测量，可以计算出它们的质量直接明星。

youdao

The combined observations showed that both planets are about 0.8 times the radius of Jupiter, or slightly smaller than Saturn, and their masses are about 0.25 and 0.17 times the mass of Jupiter.

总体的观测结果证明，这两颗行星大约是木星半径的0.8倍，略小于土星，它们的质量大概是木星的0.25倍和0.17倍。

youdao

But the acceleration it produces on the elephant and on the mass, are in an inverse ratio of their masses.

但这个力使大象和物体产生的加速度,与它们的质量成反比

耶鲁公开课 - 基础物理课程节选

And he found that the middle member of the triad had an atomic mass that was midway between the atomic masses of the end members.

他发现三元组中间的元素,的原子质量,是位于两端的元素的原子质量,的中间。

麻省理工公开课 - 固态化学导论课程节选

So, what's the conservation of mass if we divide by the atomic masses here?

那么质量守恒是什么呢？,如果我们在这儿按原子质量划分？

麻省理工公开课 - 固态化学导论课程节选

The masses of these undiscovered partners, though, are related to the mass of the Higgs.

ECONOMIST: The Higgs boson

These samples were run through a mass spectrometer - a device that effectively measures all the masses of the chemical compounds in the breath.

BBC: Exhaled breath is unique fingerprint

Using Harps data, the astronomers also counted a total of 45 candidate planets with a mass below 30 Earth masses.

BBC: Trio of 'super-Earths' discovered