Here are some of the most unprecedented and informative images of the sun ever taken.

这是一些前所未有的、信息最为丰富的太阳图像。

If I can't take the sun's altitude tomorrow, I won't be able to try again for another six months.

如果明天我不能测量太阳的高度，我就不用能在六个月之内再做测量了。

A normal solar day is the time it takes the sun to be directly above you again on earth.

正常太阳日是太阳再次位于地球正上方所需的时间。

The difference is the time it takes the sun to move through its own diameter in Earth's sky, which is about two minutes.

区别在于太阳在地球天空中穿过其自身直径所需的时间，大约为两分钟。

So while it takes the sun exactly 24 hours to be directly above you again, a star at night takes only 23 hours, 56 minutes, and four seconds to be above you again.

因此，虽然太阳需要整整 24 小时才能再次出现在您的正上方，但夜晚的星星只需要 23 小时 56 分 4 秒即可再次出现在您的正上方。