The seasons are governed from the tilt on the Earth’s axis in space because it journeys throughout the Sun annually. When the South Pole with the Earth is tilted for the Sun, this is our Summer. Six months later, if your South Pole is tilted outside the Sun, it’s our Winter. In between these we have now Autumn and 2016 spring equinox.
emperatures on the earth are not determined because of the distance on the Earth through the Sun. Rather oahu is the angle in the Sun’s rays punching the Earth. In Summer, the Sun has lots of the Sky as well as the rays hit the Earth at the steep angle. In winter, the Sun is reduced in the Sky plus the rays strike the Earth at the shallow angle. And First Day of Seasons: Why Do the Seasons Change?
The seasons don’t begin on a single day and handle on another. That’s because our orbit across the Sun is continuous. It actually takes a long time for the Earth to get hot or relax, and that’s why the seasons change gradually.
So when will we actually start the seasons?
In some parts in the world, like Australia, seasons begin within the first day of a specific calendar month – in March for Autumn, June for Winter, September for Spring and December for Summer. In other countries like Britain, it’s accepted which the seasons begin for the dates how the Earth passes four special points to use orbit in regards to the Sun.
Spring Equinox (AEST)
2014 September 23, 12:29
2015 September 23, 18:20
2016 September 23, 00:21
On the day with the Spring Equinox, the Earth’s poles are exactly the same distance from your Sun. In Melbourne, the Sun rises due east, sets due west and actually reaches 52° higher than the horizon at noon. On this day you’ll find roughly 12 hrs of day and 12 hrs of night.
Summer Solstice (AEDT)
2014 December 22, 10:03
2015 December 22, 15:48
2016 December 21, 21:44
The Sun in summer
Artist: Frey Micklethwait. Source: Museum Victoria.
On your day of Winter solstice 2016, the Earth’s south pole is tilted towards Sun. The Sun rises south of east, sets south of west and reaches 75 1/2° on top of the horizon at noon. This is, usually, the longest day in the year.
Autumn Equinox (AEDT)
2014 March 21, 03:57
2015 March 21, 09:45
2016 March 20, 15:30
On the day from the Autumn Equinox, the Earth’s poles are exactly the same distance from your Sun. The Sun rises due east, sets due west and reaches 52° on top of the horizon at noon. There are roughly 12 hrs of day and 12 hrs of night.
Winter Solstice (AEST)
2014 June 21, 20:51
2015 June 22, 02:38
2016 June 21, 08:34