When is The Summer Solstice

When is The Summer Solstice - The axis is tilted somewhat off the plane of the earth's revolution around the sun. When the axis tilts towards the sun, as it does between June and September, it is summer in the northern hemisphere but winter in the southern hemisphere.

When is The Summer Solstice,Alternatively, when the axis points away from the sun from December to March, the southern hemisphere enjoys the direct rays of the sun during their summer months.June 21 is called the summer solstice in the Northern Hemisphere and simultaneously the winter solstice in the Southern Hemisphere. The sun's rays would be directly overhead of the equator all year long.

When summer occurs in a hemisphere, it is due to that hemisphere receiving more direct rays of the sun than the opposite hemisphere where it is winter.(The winter solstice occurs when the top half of our planet, everything north of the equator, faces directly away from the sun, leaving the North Pole in complete darkness.)Tuesday may mark the sun's peak, but it doesn't typically mark summer's peak heat. [Stunning Summer Solstice Photos]This light, called twilight, lasts longest during this time of year.

Nautical twilight occurs when the sun is six to 12 degrees below the horizon, and when the horizon can still be used for navigation.Astronomical twilight happens when the sun is 12 to 18 degrees below the horizon.Saint Petersburg, Russia, is famous for its "white nights," when civil twilight reigns over the summer.

When is The Summer Solstice,In the southern hemisphere, winter and summer solstices are exchanged. The summer solstice marks the first day of the season of summer. In Chicago, there are 15:02 hours of daylight on the summer solstice of June 21, 1999.The table below gives the universal time of the summer solstice. To convert to U. S. Eastern daylight saving time, subtract 4 hours, so the summer solstice occurs on June 21, 1998 at 10:00 a.m. EDT; June 21, 1999 at 15:47 (3:46 p.m.) EDT.