kiloparsec

例句：

1. 1.The distance between two stars is approximately 450,000 kilometers, or 315,000 miles.
   两颗星星之间的距离大约是45万千米，或者说31万英里。
2. 2. The Earth's radius is about 6,371 kilometers, or 3,963 miles.
   地球的半径大约是6,371千米，或者说3,963英里。
3. 3. The galaxy is estimated to be about 100,000 light-years across, or 637,000 kilometers.
   银河系被估计横跨约10万光年，或者说637,000千米。