Question: what was the first planet ever discovered?

Hayley and the Mars Rover answered on 2 Dec 2020: last edited 2 Dec 2020 2:48 pm

Only 2 out of the 8 planets in the solar system have official discoverers and times of discovery, the other can be seen from Earth just with your eyes (they look similar to stars but are often brighter and less twinkly), so they have been known about for thousands of years!