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Winter Solstice and 10 Things About the December Solstice

Winter Solstice

In astronomy, the solstice is either of the two times a year when the Sun is at its greatest distance from the celestial equator, the great circle on the celestial sphere that is on the same plane as the earth’s equator.

Winter Solstice
Winter Solstice

In the Northern Hemisphere, the winter solstice occurs either December 21 or 22, when the sun shines directly over the tropic of Capricorn; the summer solstice occurs either June 20 or 21, when the sun shines directly over the tropic of Cancer. In the Southern Hemisphere, the winter and summer solstices are reversed.

Longest Night of the Year

The winter solstice marks the shortest day and the longest night of the year. The sun appears at its lowest point in the sky, and its noontime elevation appears to be the same for several days before and after the solstice.

10 Things About the December Solstice

  1. Winter and Summer Solstice

    In the Northern Hemisphere, the December Solstice is the winter solstice and the shortest day of the year.

  2. A Specific Point in Time

    Most people count the whole day as the December Solstice. However, the Solstice is actually at a specific moment – when the Sun is exactly overhead the Tropic of Capricorn.

  3. Second Solstice of the Year

    Solstices happen twice a year – once around June 21 and then again around December 21. On the June Solstice, the Sun is directly overhead the Tropic of Cancer (latitude 23° 30′ North) in the Northern Hemisphere, while on the December Solstice, the Sun shines directly over the Tropic of Capricorn (latitude 23° 30′ South) in the Southern Hemisphere.

  4. The Date Varies

    The December Solstice can happen on December 20, 21, 22 or 23, though December 20 or 23 solstices are rare. The last December 23 solstice was in 1903 and will not happen again until 2303.

  5. The Sun ‘Stands Still’

    The term solstice comes from the Latin word solstitium, meaning ‘the Sun stands still’. This is because on this day, the Sun reaches its southern-most position as seen from the Earth. The Sun seems to stand still at the Tropic of Capricorn and then reverses its direction. It’s also common to call it the day the Sun turns around.

  6. It’s the First Day of Astronomical Winter

    In the Northern Hemisphere, astronomers and scientists use the December Solstice as the start of the winter season, which ends on the March Equinox. For meteorologists, on the other hand, winter began three weeks ago on December 1.

  7. The Earth Isn’t Farthest From the Sun

    During winter in the Northern Hemisphere, the Earth is actually closest to the Sun. Different seasons are not defined by how far the Earth is from the Sun. Seasons occur because Earth orbits the Sun on a slant, with an axial tilt of around 23.4 degrees. Therefore different amounts of sunlight reaches the Northern and Southern Hemispheres, causing variation in temperatures and weather patterns thoughout the year. In fact, the Earth is on its Perihelion – the point on the Earth’s orbit closest to the Sun – a few weeks after the December Solstice.

  8. Earliest Sunset Not on the Solstice

    Most places in the Northern Hemisphere see their earliest sunset a few days before the Solstice and their latest sunrise a few days after the Solstice. This happens because of the difference between how we measure time using watches and the time measured by a sundial.

  9. Daylight Hours Increase Faster in the North

    If you are in the Northern Hemisphere, the increase rate of daylight hours depends on your location’s latitude – in more northern latitudes you will see a rapid increase in daylight hours compared to if you’re in the more southern latitudes.

  10. Celebrated Around the World

    Many cultures around the world hold feasts and celebrate holidays around the December Solstice.

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