Knowra December solstice December solstice The December solstice is the moment when the Sun reaches its greatest southern declination, marking the shortest day in the Northern Hemisphere and the longest in the Southern Hemisphere.
Axial tilt : The angle between a rotating body's spin axis and its orbital axis. Earth’s 23.4-degree tilt makes the December Sun appear farthest south of the equator.
Winter : The coldest season of the year in each hemisphere, opposite summer. In the Northern Hemisphere, this solstice marks the astronomical start of winter.
Stonehenge : A prehistoric monument in Wiltshire, England, built in several phases beginning around 3000 BCE. Its architecture aligns with significant solar positions, including the solstitial cycle.
Yule : A midwinter festival observed historically by Germanic peoples and incorporated into later Christmas customs. Its midwinter timing is associated with the seasonal turning around the December solstice.
June solstice : The moment when the Sun reaches its greatest northern declination, around June 20 or 21. It produces the opposite hemispheric daylight extremes six months later in the seasonal cycle.
Ecliptic : The apparent annual path of the Sun across the celestial sphere, corresponding to Earth's orbital plane. The Sun reaches its southernmost point on the ecliptic at this solstice.
Summer : The warmest season of the year in each hemisphere, opposite winter. In the Southern Hemisphere, this solstice marks the astronomical start of summer.
Newgrange : A Neolithic passage tomb in Ireland whose inner chamber is illuminated near the winter solstice sunrise. Its roof-box admits sunlight around the December solstice, linking monument design to the event.
Dongzhi Festival : An East Asian winter-solstice festival traditionally marked by family gatherings and seasonal foods. It celebrates the solstice as a turning point toward longer days.
March equinox : The moment when the Sun crosses the celestial equator northward, around March 20. Unlike the solstice, it occurs when solar declination is zero.
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