Earth, Moon & Sun System
📋 What it is
Day/night, seasons, Moon phases and eclipses all come from how Earth, the Moon and Sun move together.
🗣️ Coach says
Three bodies, one dance. Earth spinning makes day and night; its tilt as it orbits the Sun makes seasons; the Moon orbiting Earth gives us phases; and when they line up just right we get eclipses. It’s all geometry of who’s in front of what.
🧠 Memory hook
Spin → day/night · tilt+orbit → seasons · Moon orbit → phases · line-up → eclipse.
😂 Giggle
What kind of music do planets listen to?
Neptunes!
😲 Whoa!
The Moon is drifting about 3.8 cm farther from Earth every year — roughly the speed your fingernails grow.
✅ Quick check: Why do we have seasons — is it because Earth gets closer to the Sun in summer?
Say your answer out loud first — then reveal.
No — seasons come from Earth’s TILT. The hemisphere tilted toward the Sun gets more direct light and has summer.
Axial tilt, not distance, changes how directly sunlight hits each hemisphere.
🪄 Trick question: Is the Moon’s "dark side" always dark?
Careful — think it through, then reveal.
No — the FAR side gets just as much sunlight; we simply never see it because the Moon keeps one face toward Earth.
The far side is lit during new moon; "dark" here means "hidden from us", not "sunless".
🧪 Try it! (2 minutes)
Use a lamp (Sun) and a ball (Earth) with a tilt. Rotate it around the lamp and watch which "half" leans into the light.