By the Romans. As known as Galileo.
Galileo first observed the planet Mercury through his telescope in 1610.
Galileo discovered Saturn.
Galileo discovered craters on the moon so therefor technically he discovered craters.
Europa was discovered in 1610 by Galileo when he pointed a telescope at Jupiter.
Saturn was discovered in Pisa, Italy by Galileo Galilei in 1610. Galileo also observed and discovered Saturn's Rings
Galileo wasn't the first to make a telescope but he discovered the telescope at the age of 46.
Galileo
Galileo
Galileo Galileo discovered the objects in the solar system orbited the sun not the earth
Galileo DID NOT discover Mars. Mars has always been visible from Earth to the unaided human eye and was known to and named by our ancient ancestors. Galileo is believed to be the first person to view Mars though a telescope in 1609.
it is an oval and was discovered by Galileo and newton