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CSA#3
| Term | Definition |
|---|---|
| Geocentric | a model of the solar system with the EARTH as the center |
| Heliocentric | a model of the solar system with the SUN as the center |
| Solar Eclipse | happens when the Moon casts a shadow on the Earth |
| Lunar Eclipse | happens when the Earth casts a shadow on the Moon |
| New Moon | A solar eclipse can only happen in this phase |
| Full Moon | A lunar eclipse can only happen in this phase |
| Solar Eclipse | Sun ----> Moon ----> Earth |
| Lunar Eclipse | Sun ----> Earth ----> Moon |
| Umbra | Darkest shadow in an eclipse |
| Penumbra | Lightest shadow in an eclipse |
| Black Hole | When a star's gravitational pull is so strong that not even light can escape. |