Assignment:
1. One of your friends says that astronauts in orbit are weightless because they are beyond the pull of Earth's gravity. Do you agree with your friend?
2. An astronaut lands on a planet that has the same mass at the Earth but twice the diameter. How would the weight of the astronaut differ from the weight on Earth?
3. If a piece of an airplane suddenly becomes detached during flight, it will crash to Earth. Would it happen the same to a piece of satellite in orbit?
4. When a satellite is placed into a higher orbit, what happens to its period?
5. What kind of orbit is the Space Station in? How long does it take to go around the Earth? Have you seen it travel by at night in the sky?