YFT的美篇

YFT

Heaven and Earth Watch the Sunrise / Sunset
天 上 •人 间 看 日 出 • 日 落

Astronauts can enjoy 16 sunsets on the station per day

宇航员在空间站每天可以欣赏16次日出／日落

Suppose the Tiangong Space Station has the Earth stationary during its operation,
假设“天宫空间站”在运行过程中地球是静止的,
Flight speed of the Tiangong Space Station:
天宫空间站飞行速度：
About 7.8 kilometers per second, flying 28,000 kilometers per hour,
约每秒7.8公里，每小时飞行2.8万公里，
The radius of the earth is 6,371.004 kilometers,
地球半径6371.004千米，
The space station is about 400 kilometers high
空间站高度400千米。
The operating radius of the space station is 6371.004 km + 400 km =6771.004 km
空间站运行半径6371.004千米＋400千米＝6771.004千米
Operation perimeter of the space station =2 π r=23.14159266771.004 km =42543km
空间站运行周长＝2 π r＝2×3.1415926×6771.004千米＝42543.千米
The time required for the space station to circle the ground is 42,543. km and 28,000 km / h =1.5 hours
空间站绕地一周所需时间42543.千米÷28000千米／小时＝1.5小时
Around the Earth every 90 minutes.
每90分钟绕地球一圈。
24 hours around the ground for 16 hours,
24小时就会绕地公转16圈,
Each lap has half its time between the day hemisphere Earth and the sun,
每圈都有一半时间位于昼半球，地球和太阳之间,
The other half is in the shadow of Earth.
另一半时间在夜半球，地球的阴影里.
When the Tiangong space station goes from night into the sunrise, will see the sunrise,
当“天宫空间站”由夜入昼时会看到日出,
From day to night to sunset,
由昼入夜会看到日落,
Sixteen laps will see sixteen sunrises and sunset.
十六圈就会看到十六次日出日落.
Sunrise and sunset in the Sunlight Town during Typhoon Sea Anemone
台风“海葵”期间，昱城的日出和日落