what is a satellite?
an artificial object which has been intentionally placed into orbit.
what did the soviet union do in 1957
launched the world's first artificial satellite
what was it called?
Sputnik 1
how many satellites are in orbit?
3,600
What planets do they orbit around?
Earth , Mercury, Venus, Mars, Jupiter, Saturn,
do they ever become debris?
Yes
how fast do they go
unknown
what are satellites used for?
many purposes
such as?
military and civilian Earth observation
and what else?
communications