🛰 Artificial satellites
Unit 2 · Earth, Moon & stars · 9 min
Satellites orbit Earth for communications, weather, navigation and Earth observation. The International Space Station flies about 400 km up and circles Earth roughly every 90 minutes. Geostationary satellites sit about 36,000 km up, matching Earth's rotation so they seem fixed in the sky — ideal for TV broadcasting, like Egypt's Nilesat.
Words in this lesson
- 卫星 (wèi xīng) — satellite
- 轨道 (guǐ dào) — orbit
Project: List 3 services you used today that depend on satellites.
