This preview shows page 1. Sign up to view the full content.
Unformatted text preview: distance from the sun is the same for all planets Aphelion Perihelion AU- astronomical unit Galileo Galilee o First to build: Pendulum clock Thermometer Telescope Newtons law- how much speed you need from a rocket to get into space Orbital speed- circular orbit Escape velocity- how much it needs to overcome gravitational pull of earth Earth is what keeps astronauts in orbit...
View Full Document
- Winter '06