He discovered them orbiting the Planet.
He discovered it on the moon.
that the moon was not flat, it was a sphere.
Galileo used his telescope to look into space where he noticed that Nicalous Copernicus was correct in saying that the Earth revolves around the sun. Which Galileo was arrested for believing.
jupiters ice moon is Io
Jupiter was discovered by Galileo on January 7, 1610.
Galileo Galilei discovered it on 7 January 1610.
He discovered it on the moon.
Galileo
he discovered that there were craters on the moon
Galileo was the first
Miranda, the moon of Uranus, was discovered by Gerard Kuiper in the 16th of February 1948, not by Galileo
Galileo discovered craters on the moon so therefor technically he discovered craters.
Galileo
that the moon was not flat, it was a sphere.
Galileo used his telescope to look into space where he noticed that Nicalous Copernicus was correct in saying that the Earth revolves around the sun. Which Galileo was arrested for believing.
Well yes and no. The phases of the moon were understood well before Galileo --- however Galileo discovered the moons of Jupiter and no doubt their associated phases --- as well as the phases of Venus.
jupiters ice moon is Io