Sunday 5th July 2020 for Bristol, UK
The Sun's Position in GEMINI
The Solar Information for today
|Solar Ecliptic Longitude:||104.1244 Degrees|
|RA of the Sun:||7 hrs 1 mins 20 secs|
|Declination of the Sun:||22 degs 41 mins 0 secs|
|The Sun is in Constellation of:||GEMINI|
|Solar Altitude:||29.914 Degrees|
|Solar Azimuth:||269.554 Degrees|
|Sun Transits at:||01:15 pm|
|The Sun Rises at:||05:02 am|
|The Sun Sets at:||09:29 pm|
|Civil Twilight Begins at:||04:15 am|
|Civil Twilight Ends at:||10:15 pm|
|Nautical Twilight Begins at:||03:05 am|
|Nautical Twilight Ends at:||11:25 pm|
|Astronomical Twilight Begins at:||01:00 am|
|Astronomical Twilight Ends at:||01:00 am|
Is a scientific term, and we define it as “the period after sunset or before sunrise ending or beginning when the sun is about 6 degrees below the horizon and during which on clear days there is enough light for ordinary outdoor occupations.
The term dates back to when sailors used the stars for navigation, because during nautical twilight – the spell when the sun is between 6 and 12 degrees below the horizon – most stars can be seen with the naked eye. Nautical dusk is the moment the sun reaches 12 degrees below.
The sun is between 12 and 18 degrees below the horizon, and this is the spell when there is still a little light in the sky, but before true dark. After astronomical dusk at 18 degrees below, all stars will be visible.
This diagram shows the definition of the Right Ascension and Declination co-ordinates on the sky. Right Ascension is measured from the Vernal Equinox, (First Point of Aries - 0 Degrees) where the sun crosses the Equator Line (as projected across the sky) going from South to North. The value of Right Ascension is given in hours, minutes and seconds by dividing the angle of an object in the sky from the First Point of Aries by 15 (The number of degrees the earth moves in one hour. The declination angle is therefore the angle up towards the North Pole axis projected into the sky. Image via Wikimedia Commons