一个太阳半径等于696,000公里。
接下来是辐射区，其范围从核心表面到太阳半径的70%处，占太阳总体积的32%，总质量的48%。
Next is the radiative zone, which extends from the core to 70 percent of the way to the sun's surface, making up 32 percent of the sun's volume and 48 percent of its mass.
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。
The sun will then become what's called a red giant, and its radius will reach just past the orbit of Venus.
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.
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.
视界的半径就是，3公里，若m是太阳的三倍重。
If m is the mass of the sun, the radius of the event horizon is three kilometers.
天文学家一般以太阳的半径为基本单位表征恒星的大小。
Astronomers generally measure the size of stars in terms of the radius of our 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。
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.
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.
太阳核心半径为太阳表面半径的1/4。
The core extends from the sun's center to about a quarter of the way to its surface.
太阳位于银河系的猎户臂，距离银心约为半径的三分之二。
Our sun is on the Orion spiral arm, about two - third from the center.
与太阳不同的是无论在哪个方向，月亮可以从北方5度(10月球半径)到南方5度与偏离氐宿一。
Unlike the sun, the moon can swing anywhere from 5 degrees (10 moon diameters) north to 5 degrees south of this star.
与太阳不同的是无论在哪个方向，月亮可以从北方5度(10月球半径)到南方5度与偏离氐宿一。
Unlike the sun, the moon can swing anywhere from 5 degrees (10 moon diameters) north to 5 degrees south of this star.
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