The Sky Above Vouhead Weather

At: 20/11/2017 - 22:49
The Circle represents the Horizon around. His Centre (Zenith) is the Point directly above Vouhead Weather

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With the common Constellation Names and the Ecliptic of our Sun (red dashed line)
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Legend

The Ursa Minor or Little Bear or Little Dipper, belongs to the Circumpolar Constellations of the Northern Hemisphere. This means that he is always visible. He is mentioned here because of the fact, that on his tail is the star aUMi. Best known as Polaris or the Northern Star. In our time he rests with a minimum deviation (40 arcmin) on the extension of Earth's axis to the north. This gap will be reduced to a minimum of 26.5 minutes in 2100. Then he will justify his name again, for a few centuries, after 25.770 years! Also in 13.727 years, Vega (αLyr - α star in the constellation Lyra) will be the Northern Star! Now however, and for a long time to come, he is on the North Celestial pole and is the center which around revolve, seemingly of course, all the stars for the observer who stands on Earth. He is a bright supergiant, with surface temperature at 7.200 K and he is 2.200 times brighter, with six times bigger mass and 27,000 times larger volume than our Sun! He is relatively bright and stands out because there are not other brighter stars in the area. Nowadays the position of the brightest star holds Sirius. The Polaris is actually the 48th in brightness

The Earth, rotating within a relatively small diameter, Earth centered, Celestial Sphere. Depicted here are Stars (white), the Sun Ecliptic (red) and Right Ascension and Declination lines (green) of the Equatorial Coordinate System (Celestial Coordinates)

So the observer, having as a benchmark the Polaris and knowing, based on the Sky Map, where every constellation is at the time of observation, can recognize him in heaven. This is certainly not simple, but not impossible! In the figure above seems how to find the Polaris if we know where North is and at what Latitude we are standing. Another way is to find the Ursa Major or Great Bear, which is considered easier, and extend five times the opposite side of the tail, to the North. There we will meet the Polaris

Regarding to the Sun Ecliptic, which is a result from Earth's tilt at 23,44°, the above figures are showing the position according to the season and in relation with the Celestial Equator, which is always in the same position, located in an extension of Earth's Equator and in a position to the observer at 90° minus the Latitude. It also seems where on the Sun Ecliptic are the Solstices and Equinoxes marked during the year


The Celestial Sphere
(Planetario di Milano)


The Sun Ecliptic
(Planetario di Milano)



Sun / Moon Trajectory

Visible at Vouhead Weather

Legend

Sun (Solar Noon)
1. Noon is technically when the Sun is at his Zenith
    (highest Elevation and lowest Zenith Angle) and
    not necessarily at 12:00 o'clock
Twilight at Sunrise
1. Astronomical Twilight is when the Sun is between 12°
    and 18° below the Horizon
2. Nautical Twilight is when the Sun is between 6° and
    12° below the Horizon
3. Civil Twilight is when the Sun is 6° below the Horizon
    and ends at 0°
4. Sunrise Starts
Twilight at Sunset

1. The same as at Sunrise, only in reverse order
    (Sunset Ends,3,2,1)
Moon (In case of two plots)
1. The white dashed plot to the right is the previous
    Moon path, from midnight up to Moonset
2. The white dashed plot to the left is for the upcoming
    Moon path, from Moonrise up to midnight tonight


Moon's orbit around the Sun and Earth
(Planetario di Milano)


Moon phases and positions
(Planetario di Milano)



Sun / Moon Calendar

20/11/2017

Sun

Moon

Sun Moon age: 2 days,3 hours,22 minutes,5%
Sunrise: 07:20
Sunset: 17:06
Daylight: 09:46
Moonrise: 08:47
Moonset: 18:47


First Quarter Moon Full Moon Last Quarter Moon New Moon
First Quarter Moon Full Moon Last Quarter Moon New Moon
26/11/2017 19:04
26 November 2017 17:04 UTC
03/12/2017 17:48
3 December 2017 15:48 UTC
10/12/2017 09:52
10 December 2017 07:52 UTC
18/12/2017 08:31
18 December 2017 06:31 UTC


Vernal Equinox
Start of Spring
Summer Solstice
Start of Summer
Autumn Equinox
Start of Fall
Winter Solstice
Start of Winter
Start of Spring First day of Summer First day of Fall First day of Winter
20/03/2017 12:29
20 March 2017 10:29 UTC
21/06/2017 07:25
21 June 2017 04:25 UTC
22/09/2017 23:02
22 September 2017 20:02 UTC
21/12/2017 18:29
21 December 2017 16:29 UTC

 

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Sunlight and Clouds

At: 20/11/2017 - 22:49


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Moon Phase

At: 20/11/2017 - 22:49


Waxing Crescent Moon
5% Illuminated
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   This data is not to be used for protection of life and property  
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