摘要
What is orbit?In physics,an orbit is the gravitationally curved trajectory of an object,such as the trajectory of a planet around a star or a man-made satellite around the Earth.Normally,an orbit refers to a regularly repeating trajectory,although it may also refer to a non-repeating trajectory sometimes.
出处
《问天少年》
2022年第4期82-83,共2页
Aerospace Knowledge Youth
