Summer
Solstice (June 21) is the longest day in the Northern Hemisphere:
12 Noon at
Summer Solstice: Sun Hand and Ecliptic intersect with Tropic of Cancer.
The Sun reaches its highest position (almost at Zenith, 90° above Horizon).
6pm at Summer
Solstice: The intersection of Sun Hand and Ecliptic is still in the light
grey zone. It will take several hours before the Sun sets.
Winter
Solstice (December 21) is the shortest day in the Northern Hemisphere:
12 Noon at
Winter Solstice: Sun Hand and Ecliptic intersect with Tropic of
Capricorn. The Sun is at its lowest position (less than 30° above Horizon).
6pm at Winter
Solstice: The intersection of Sun Hand and Ecliptic is just passing the
twilight zone. The Sun has set a few hours ago and Night has fallen.
