| A | B |
| satellite | any object that revolves around another body in space |
| lunar month | the time taken for the moon to orbit the earth completely; 28 days |
| non-luminous | does not give out or emit its own light |
| eclipse | the partial or total blocking of light of one celestial body by another |
| solar eclipse | an eclipse in which the moon passes between the sun and the earth |
| total eclipse | a solar eclipse in which the moon completely blocks the sun’s light for a short period |
| totality | event that occurs when a celestial body completely eclipses another celestial body |
| lunar eclipse | an eclipse that occurs when the moon passes through the earth’s shadow, i.e. when the earth passes between the sun and the moon |