^^

Almanac

AEST

SUN
Information

EARTH
Current Showing Clouds

MOON
Information

Sun Spots
Sunlit Earth Waxing Gibbous, Moon at 10 days in cycle
Day Length : 10:25 hrs
 Dawn : 06:27 On 26/04/2018
Sunrise : 06:56 On 26/04/2018 
Transit : 12:09 On 26/04/2018
Sunset : 17:22 On 26/04/2018
   Dusk : 17:52 On 26/04/2018
DAWN and DUSK are CIVIL TWILIGHT
Astronomical Twilight Start : 05:20
       Nautical Twilight Start : 05:53
       Nautical Twilight  End : 18:25
Astronomical Twilight  End : 18:58
There will be 2min 36s less daylight tomorrow
Waxing Gibbous
79% Illuminated
Moonrise : 15:48 On 26/04/2018
   Transit : 21:31 On 26/04/2018
 Moonset : 02:14 On 26/04/2018
Moon at 10 days in cycle


Full Moon Last Quarter Moon New Moon First Quarter Moon
Full Moon Last Quarter Moon New Moon First Quarter Moon
Monday
30/04/2018 10:58
30 April 2018 00:58 UTC
Tuesday
08/05/2018 12:09
08 May 2018 02:09 UTC
Tuesday
15/05/2018 21:48
15 May 2018 11:48 UTC
Tuesday
22/05/2018 13:49
22 May 2018 03:49 UTC


Autumnal Equinox
Start of Autumn
Winter Solstice
Start of Winter
Spring Equinox
Start of Spring
Summer Solstice
Start of Summer
First day of Fall First day of Winter Start of Spring First day of Summer
21/03/2018 03:15
20 March 2018 16:15 UTC
21/06/2018 20:07
21 June 2018 10:07 UTC
23/09/2018 11:54
23 September 2018 01:54 UTC
22/12/2018 09:23
21 December 2018 22:23 UTC
       
Countdown Time to next change of each Season

Solar Cycles - Explained

Southern Hemisphere

Autumnal Equinox
Start of Autumn
Fall Equinox
Northern Equinox
March Equinox
Winter Solstice
Start of Winter
 
 
June Solstice
Spring Equinox
Start of Spring
Vernal Equinox
Southern Equinox
September Equinox
Summer Solstice
Start of Summer
 
 
December Solstice

Northern Hemisphere

Spring Equinox
Start of Spring
Vernal Equinox
Northern Equinox
March Equinox
Summer Solstice
Start of Summer
 
 
June Solstice
Fall Equinox
Start of Fall
Autumnal Equinox
Southern Equinox
September Equinox
Winter Solstice
Start of Winter
 
 
December Solstice

An Equinox is an astronomical event that happens twice, once in spring and once in autumn, each year when the tilt of the Earth's axis is inclined neither away from nor towards the Sun. During Equinoxes the tilt of the Earth (with respect to the Sun) is 0° and because of it, the duration of the day and the night are almost equal on Equinox day i.e. 12 hours.

Equinoxes occur on 20th or 21st March and 22nd or 23rd September each year and both days has equal length of the day and the night.

During March it is spring time in the Northern hemisphere and March Equinox is called Vernal Equinox and Spring Equinox while it is autumn time in the Southern hemisphere and March Equinox is called Autumnal Equinox and Fall Equinox. In other words on March Equinox it is spring time in the UK, the USA, Canada, Russia, India and China while it is autumn time in Australia, Argentina, Chile, New Zealand and South Africa.

Similarly, during September it is autumn time in the Northern hemisphere and September Equinox is called Autumnal Equinox and Fall Equinox while it is spring time in the Southern hemisphere and September Equinox is called Vernal Equinox and Spring Equinox. In other words on September Equinox it is autumn time in the UK, the USA, Canada, Russia, India and China while it is spring time in Australia, Argentina, Chile, New Zealand and South Africa.

To avoid any confusion Equinoxes are preferably referred as March Equinox (Northern Equinox) and September Equinox (Southern Equinox).




SUN DATA
Sun Position Chart at time of page visit

sun and moon position in sky

Day / Twilight / Night 24-hour "clock" at time of page visit

day/twilight/night

Clock Legend

solar
  • Noon is technically when the Sun is at Zenith.
  • Morning civil twilight is when the Sun is 6° below the horizon and ends at Sunrise.
  • Evening civil twilight begins at Sunset and ends when the Sun reaches 6° below the horizon.
  • Nautical twilight is when the Sun is between 6° and 12° below the horizon.
  • Astronomical twilight is when the Sun is between 12° and 18° below the horizon.

 

Images courtesy of UMBRA and Fourmilab Switzerland
Moon images by BCJKiwi SilverAcorn.nz

Sun Elevation Angle

The sun's elevation angle is the angular height of the sun in the sky measured from the horizontal. The elevation is 0° at sunrise and sunset. It is 90° when the sun is directly overhead. This occurs only at the equator during the spring and fall equinoxes. The elevation angle varies throughout the day and is dependant on the latitude of a particular location as well as the day of the year.