By the Romans. As known as Galileo.
Galileo first observed the planet Mercury through his telescope in 1610.
Galileo discovered Saturn.
Galileo discovered inertia! :)
Galileo discovered craters on the moon so therefor technically he discovered craters.
Saturn was discovered in Pisa, Italy by Galileo Galilei in 1610. Galileo also observed and discovered Saturn's Rings
Europa was discovered in 1610 by Galileo when he pointed a telescope at Jupiter.
Galileo
Galileo
Galileo wasn't the first to make a telescope but he discovered the telescope at the age of 46.
Galileo Galileo discovered the objects in the solar system orbited the sun not the earth
it is an oval and was discovered by Galileo and newton