太阳半径

一个太阳半径等于696000公里。

One solar radius equals 696,000 kilometers .

文章还估计了拍摄不同太阳半径上日冕所需的曝光时间。

The necessary exposure time for corona at different solar radius is estimated as well .

继而分析1997~2003年所有爆发在冕洞边缘的快速晕状CME，发现源区离冕洞距离小于0.2Rs（太阳半径）的CME均没有引起大的SEP事件。

Then by investigating all fast halo CMEs close to CHs from 1997 to 2003 , it is found that none of the CMEs produced a major SEP event when the surface distance between the CME and coronal holes is less than 0.2R-s .

这是地球，这是太阳，轨道半径用R表示。

So here is the Earth , here is the sun , mass sun , and the orbital radius is capital R.

当然，转动惯量是，怎么也比不上太阳的，因为半径太小，而转动惯量，与半径的平方有关。

So , of course , the moment of inertia is extremely modest compared to the sun , because the radius is so small and the moment of inertia goes with the radius squared .

我们知道太阳的质量，太阳的半径，所以可以计算出，太阳的惯性是多少。

We have the mass of the sun , we have the radius of the sun so you can calculate the moment of inertia of the sun .