What Are Eclipses?

Solar and lunar eclipses are spectacular phenomena which captivate people around the world, but what causes them? Physics - Our Solar System - Learning Points. A lunar eclipse occurs when the Earth blocks sunlight from reaching the Moon. A solar eclipse occurs when the Moon blocks out the Sun's light. Solar eclipses should not be looked at without protective eyewear. Lunar and solar eclipses usually occur once every 18 months. A Twig Context Film. Reinforce and extend the learning required by the curriculum. Twig’s context films show abstract concepts in action in the real world.