Year - The length of time it takes for a planet to orbit the Sun, Leap year - A year that has an extra day, Day - The length of time it takes for a planet to complete one full rotation, Daylight - Half of the Earth facing the Sun, Night time - Half of the Earth facing away from the Sun, Equinox - Equal hours of day time and night time, Lunar ecplise - Earth passes between the Moon and the Sun, Solar eclipse - Moon passes between the Earth and the Sun, Umbra - Darkest point of the shadow, Penumbra - Lightest part of the shadow,

Earth, Sun and Moon

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