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Seasons
Changes in weather patterns and daylight hours caused by Earth's tilt and revolution around the Sun.
Direct Sunlight
Sunlight that is concentrated and more intense due to its direct angle on Earth's surface.
Indirect Sunlight
Sunlight that is more spread out and less intense due to its indirect angle on Earth's surface.
Winter Solstice
The shortest day of the year, occurring around December 21-22 in the Northern Hemisphere.
Summer Solstice
The longest day of the year, occurring around June 21-22 in the Northern Hemisphere.
Vernal Equinox
The start of spring when day and night are approximately equal in length, around March 20-21.
Autumnal Equinox
The start of autumn when day and night are approximately equal in length, around September 22-23.