Atch the following vocabulary with their definitions. 1. aphelion farthest point from the sun in a planet's orbit 2. perihelion model of the solar system that suggested the sun was the center of the universe and planets orbit it in circular paths 3. satellite model of the solar system that suggested earth was the center of the universe and everything orbited around it 4. geocentric outermost layer of the sun 5. heliocentric a small celestial body that revolves around a larger planet 6. photosphere closest point to the sun in a planet's orbit 7. chromosphere thin layer of the sun located between the photosphere and the corona