Activity for Kami‭

Type	On...	Excerpt	Status	Date
Question	—	How large does a spacecraft need to be to be visible from the surface of the Earth at 400 km altitude? If a spacecraft is in low earth orbit 400 Kilometres above earth. How big does it need to be visible from earth with the human eye without telescopes, with enough of its details to clearly distinguish the craft from stars. // EDIT: The ISS is visible to the human eye as a fast moving object, but ... (more)	—	about 10 years ago