Moon refects light from the sun.
Full moon when the whole surface is lit up and facing Earth.
New moon when the dark half is facing us.
Lunar eclipse- When the moon orbits it sometimes passes into Earths shadow, Earth blocks sunlight from moon so no light is reflected. Total lunar eclipse is no direct sunlight, though moon isn't fully in the Earths shadown so its a partial lunar eclipse.
Solar eclipse- moon by chance is the right size + distance away that when it passes sun and Earth it can block out sun, from some parts of Earth sun is totally blocked, from many places it will only be partial solar ecipse.
Moon orbits the sun at a slight angle so most of the time Sun, moon, Earth dont line up.
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