Science College, General Science Dept
Are there any more planets beyond Pluto? Many scientists believe this is true. It is thought that Planet X might be waiting to be discovered. It has been suggested that this planet is five times larger than Earth and takes 200 - 1000 years to travel around the Sun.
Thank you for taking our class today. We hope you enjoyed it and learned a lot, too. Wow! We really covered a lot of material. We hope you paid close attention, because it is now time for you to take the exam. Don't worry. If you studied hard, you will do well.
Graphics are from The Nine Planets Just for Kids http://www.staq.qld.edu.au/k9p/>
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