Ancient Astronomy

• Ptolomy - He updated the geocentric model around 100 A.D adding epicycles to the orbit of the planet
• Aristotle - First person describe the geocentric model aroun 300 B.C say that celestial bodies seem to move across the sky from east-west earth must be at the center, with everything moving around us
• Copernicus - Who proposed the heliocentric model of the universe?

• Kepler - He improved the heliocentric model by using ellipses for the orbits instead of circles
• Galaxy - A large group of stars, gas, and dust boud together by gravitational attractions
• Hubble space telescope - Launched in 1990 and has been orbiting 600km above the earth that built by the ESA and NASA
• Telescope - A building designed and equipped with a powerful telescope to observe the night sky
• Comet - An icy small solar system body that warms and begins to release gases when passing close to the sun
• Meteoroid - A small rocky or metallic body in outer space
• Meteorite - A solid piece of debris from an object such as a comet asteroid or meteoroid that originates in outer space and survives its passage through the atmosphere to reach the Earth's surface of a planet or a moon
• Asteroid - It is sometimes called minor planets, are rocky remnants left over from the early formation of our solar system about 4.6 billion years ago
• Meteor - A streak of light in the sky caused by a meteoroid crashing through the Earth's Atmosphere
• Maria - Dark grey areas of the moon called it is the latin word for sea because people used to think these areas were large bodies of water