UP IN THE SKY What do you see when you look up in the night sky With no clouds you can see many bright stars The brightest object in the night sky is not a star It is Earth's Moon Since people first walked on Earth they have studied the
A moon is a satellite which is an object that orbits a larger object Moons orbit planets and other A large bodies because of gravity Gravity is a force that attracts objects to the mass of other things Planets in orbit stars such as the Earth's gravity keeps the Sun but moons are Moon in orbit around our caught in the gravity home planet of planets Every planet in Earth's solar system THINK ABOUT IT except Mercury and Venus New moons are always has at least one moon that being discovered by scientists know about scientists Why do you think Mercury and Venus do not have any moons A
Moon SATELLITE OR PLANET Today there are many satellites orbiting Earth Humans made all but one of these satellites They put these machines into space for various reasons Earth has only one natural satellite the Moon The ancient Greeks I called Earth s Moon a planet To them a planet was anything big and bright The Hubble Space Telescope is a human made satellite that orbits
THINK ABOUT IT The International Space that moved in the sky Station ISS is a satellite This belief meant that a that orbits Earth What is star such as the Sun was a the difference between the planet but Earth was not ISS and the Moon In the 1600s the V invention of the telescope let people observe the Moon and the rest of space more carefully Now people know there are many moons in the solar system and there may be many more throughout the universe When seen from the Moon Earth appears to be in one spot all the
