1. Stronger Eyes and Better Numbers Topic 2

2. Telescopes Used to magnify objects at great distances Uses: Objective lens: Large and at the front of the telescope Ocular lens: Is the eyepiece through which you view the magnified object.

3. Galileo’s Approach to Inquiry His observations supported the Sun- centered model Observed that Jupiter’s moons rotated around Jupiter, but not Earth. He could not see the details of stars as he did with planets. So he concluded that stars are further away.

4. Resolving Power This is the fineness of detail that the telescope can produce of the object in view. A larger diameter objective lens provides finer detail when viewing. Increases resolving power!

5. Refractors and Reflectors Refracting telescopes: Have a lens for their objectives Reflecting telescopes: Have objective mirrors

7. Universal Gravitation Kepler described the elliptical shape of the planets’ orbits. 80 years later, Isaac Newton stated the law of universal gravitation. There is a gravitational force between all objects that pulls them together. Planets orbit around the Sun because of the Sun’s gravitational force.

8. To Do: Early contribution worksheet