Axis - The imaginary line Earth spins around., Orbit - The path one object takes around another., Tilt - The angle of Earth's axis, causing seasons., Rotation - When Earth spins on its axis., Solstice - The longest or shortest day of the year., Equinox - Day and night are the same length., Season - Changes in weather patterns during the year., Day - Time when a place faces the Sun., Night - Time when a place faces away from the Sun., Moon - Earth's natural satellite., Phase - The shape of the lit part of the Moon., New Moon - The Moon is not visible., Full Moon - The whole Moon is visible., Eclipse - One object blocks light from another., Solar - Related to the Sun., Lunar - Related to the Moon., Umbra - The darkest part of a shadow where all light is blocked., Penumbra - The lighter part of a shadow where only some light is blocked., Shadow - A dark area where light is blocked., Year - A period of 365.25 days,

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