Galileo discovered that the Moon has mountains and valleys.
He discovered that the moon had valleys and craters and that it wasn't smooth.
the moon is dry and airless and has an irregular surface. Compared to Earth, the moon is very small and has large variations in its surface temperature.
He discovered it on the moon.
He discovered them orbiting the Planet.
He observed them around the year 1609.
that the moon was not flat, it was a sphere.
Galileo Galilee proved that the earth is round by earths shadow on the moon.
He discovered it on the moon.
he discovered that there were craters on the moon
Galileo was the first
He discovered them orbiting the Planet.
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
He observed them around the year 1609.
that the moon was not flat, it was a sphere.
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.
Galileo Galilee proved that the earth is round by earths shadow on the moon.
Galileo did not name the Moon the Moon.