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Observing the Solar System

Observing the Solar System. Mrs. Davis Earth Science. Solar System in Order. My – Mercury Very – Venus Educated – Earth Mother – Mars Just – Jupiter Served – Saturn Us – Uranus Nine – Neptune Pickles - Pluto. Wandering Stars.

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Observing the Solar System

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  1. Observing the Solar System Mrs. Davis Earth Science

  2. Solar System in Order My – Mercury Very – Venus Educated – Earth Mother – Mars Just – Jupiter Served – Saturn Us – Uranus Nine – Neptune Pickles - Pluto

  3. Wandering Stars • The Greeks noticed that the stars had a pattern that did not change but they noticed that there seemed to be five points of light that wandered among the stars. • They called these objects planets which means “wandering star”. • These planets were Mercury, Venus, Mars, Jupiter, and Saturn.

  4. Greek Ideas: Earth at the Center • Aristotle Believed that the universe is perfect and finite and that Earth is stationary at its center. Geo – means Earth Geo centric system – Earth is at the center of the revolving planets.

  5. Ptolemy • He thought that Earth is at the center of the system of planets. The moon, Mercury, Venus, the sun, Mars, Jupiter, and Saturn revolve around Earth. • The planets move in little circles that move in bigger circles.

  6. Nicolas Copernicus • Thought that the sun was the center of the universe. • His sun-system is called “heliocentric” for the sun. Earth and other planets revolve around the sun.

  7. Galileo • Italian astronomer who was the first scientist to use a telescope to look at objects in the sky. • He saw fours moons revolving around Jupiter. • He discovered that Venus goes though phases like Earth’s moon.

  8. Tycho Brahe • Danish astronomer who observed the positions of the planets for about 20 years.

  9. Johannes Kepler • German mathematician who discovered that the orbit of each planet is an ellipse. • An ellipse is an elongated circle, or oval shape.

  10. Isaac Newton • Newton concluded that two factors – inertia and gravity-combine to keep the planets in orbit. • Inertia means that a moving object will continue to move in a straight line or a stationary object will remain in plain until some force acts to stop its motion. • Gravity pulls the moon towards Earth.

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