Summer solstice
Moon
Orbit
orbits Earth every 28 days.
doesn't affect the solstice directly.
Tides
affects the tides, not the seasons.
Earth
Tilt
Earth is tilted at 23.5°.
Tilt causes the seasons.
Rotation
Earth spins on its axis.
A day is 24 hours.
Orbit
Earth orbits the Sun every year.
Distance from the Sun changes slightly, but tilt creates seasons.
Sun
Energy
The Sun gives light and heat.
Sunlight intensity changes with Earth’s tilt.
Position
Sun is highest in the sky.
Longest day, shortest night.
Northern Hemisphere
Summer starts here.
More hours of sunlight.
General facts
Northern Hemisphere tilts toward the Sun.
The Sun is at its highest point.
Longest day of the year.