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.
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。
Astronomers generally measure the size of stars in terms of the radius of our sun.
天文学家一般以太阳的半径为基本单位表征恒星的大小。
The sun will then become what's called a red giant, and its radius will reach just past the orbit of Venus.
太阳就变成了所谓哦红巨星，它的半径将会达到以前金星的运行轨道。
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.
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 here is the Earth, here is the sun, mass sun, and the orbital radius is capital r.
这是地球，这是太阳，轨道半径用r表示。
White dwarfs typically have a radius just.01 times that of our own sun, but their mass is about the same.
普通白矮星的半径只有太阳的百分之一，但是它们的质量与太阳相仿。
White dwarfs typically have a radius just.01 times that of our own sun, but their mass is about the same.
普通白矮星的半径只有太阳的百分之一，但是它们的质量与太阳相仿。
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