When does solar eclips occurs?

Is the moon as big as the sun? Which phenomenon has been responsible for mass extinctions? How long does it take to go to Jupiter? What would be a Hinky-Pinky for 'modest thunder'? How did traveling to space effect Neil Armstrong? Why was sputnik 1 special? Can you see Northern lights in Copenhagen? Can a lunar month be 31 days? How does the slingshot effect or gravity work to assist a change in orbit of a spacecraft? What does Thor look after? When did Apollo 13 find out there was a problem? Did man really land on the moon? Why does the hubble see better than ground-based telescopes? How many moon landings have been to the moon and who were they? What is the most widely accepted idea about the origin of the moon? What time does dawn happen? What are huge hot balls of gas that are held together by gravity and give off their own light? What is the cost of one solar panel? What is the outer layer of thermosphere extending towards space called? If you drop marbles into a pan of sand what would you be simulating about the Moon's surface?

When does solar eclips occurs?