1) What is the biggest planet in our Solar System?
2) What do we call the path of a planet or comet around the sun?
3) What is the name of the sun's closest star?
4) What is the force of gravity between two objects?
5) How many days does it take for Earth to orbit around the sun?
6) How fast does light travel through a vacuum?
7) What type of radiation has the longest wavelength?
8) How many planets are in our Solar System?
9) What is the brightest star in the night sky?
10) Q11 What type of energy is most often used to generate electricity?