| A | B |
|---|
| eclipse | occurs when a shadow is cast on another body |
| penumbra | lighter part of shadow |
| umbra | darker part of shadow |
| solar | type of eclipse in which the moon casts a shadow on the sun |
| total solar | type of eclipse when the moon perfectly blocks the disc of the sun and the sun's atmosphere can be seen |
| partial solar | type of eclipse when the moon blocks only a portion of the sun's disc |
| lunar | type of eclipse that occurs when the Earth casts a shadow on the moon |
| total | type of lunar eclipse seen when the entire moon is in the Earth's shadow |
| annular | type of lunar eclipise that occurs when the moon is at apogee and a bright yellow ring appears around the shadow |
| apogee | moon's position when it is farthest from Earth |
| Moon's plane tilted 5 degrees | why we don't have eclipses every month |
| 27.3 | lenght of the moon's revolution and rotation period |
| 29.5 | length of lunar month |
| synchronoous rotation | period of rotation = period of revolution |
