On December 21, the Earth is positioned at the December solstice. This is when the Northern Hemisphere experiences the winter solstice, marking the shortest day and longest night of the year, while the Southern Hemisphere experiences the summer solstice, with the longest day and shortest night of the year.
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The sun's rays strike Earth at their northernmost position during the summer solstice (around June 21 in the Northern Hemisphere) and at their southernmost position during the winter solstice (around December 21 in the Northern Hemisphere).
December 21 is important to science because it marks the winter solstice in the Northern Hemisphere, which is the shortest day and longest night of the year. This event is significant for scientists studying astronomy and the Earth's axial tilt, as well as for cultures around the world that mark this day with various traditions and celebrations. Additionally, the winter solstice has been studied historically as a key indicator of the changing seasons and the movement of the Earth in relation to the sun.
The moon was at perigee on December 21, 2010. Perigee is when the moon is closest to the Earth in its orbit.
The sun's lowest position in the sky occurs at sunrise and sunset. This is when the sun is closest to the horizon and its rays have to travel through a greater thickness of the Earth's atmosphere, resulting in the scattering of shorter wavelengths of light and the appearance of warmer colors like red and orange.
Just count the months between December and June.Just count the months between December and June.Just count the months between December and June.Just count the months between December and June.