EXPERIMENT - Twilight Phases Timelapse || How&Why Real Life
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- Опубліковано 11 вер 2024
- As a continuation of my previous video "The Science of Sunset" I decided to make a timelapse video on how the phases of twilight seem in real life. Theory is good but practice is better. Please consider to share this video and subscribe for more every week! Do not forget to ring the bell once you subscribe.
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Beautiful time lapse video! I love doing time lapses as well. Great work. Thank you for sharing it. Greetings
Thank you so much! Be sure to share on social platforms!
The nautical twilight is just so beautiful
Οh it is, in real life even better!
It would be good if someone (you?) showed real life scenes of the various phases. Have not found this on UA-cam yet. Like, show shots of neighborhoods, baseball fields, major city streets with tall buildings, golf course, etc. People want to know if they can safely play baseball during nautical twilight.
This is actually a good idea!
Night-5:00AM
Astronomical Dawn-5:15AM
Astronomical Twilight-5:30AM
Nautical Dawn-5:45AM
Nautical Twilight-6:00AM
Civil Dawn-6:15AM
Civil Twilight-6:30AM
Dawn-6:45AM
Sunrise-7:00AM
Early Morning-8:30AM
which one is الفجر الصادق the time of fajr prayer ?
@@donotaskmemyname3902 nautical twighlight
@@donotaskmemyname3902 In the video it is at 5:51 AM
@@Mustafa_Shahzad I think what he meant was Nautical Dawn. Nautical Twilight is the range or area from 6 to 12 degrees below horizon. The sun at -12 degrees is the start of Nautical Twilight and the name for that particular angle is Nautical Dawn.
5.30am on that day and time was only -12°, the camera didn't capture the twilight well.
Thank you for helping me understand the phases for each term! I learned something from you today. Thank you kindly for posting this 🙏
WOW love timelapse videos! Stay safe to bring us more
Peace
when you filmed this could you see light at the beginning of Astronomical twilight? was it much clearer than on the video? thanks
Yes, I could see light with a naked eye throughout the astronomical twilight. My camera was not so sensitive to record it though.
@@howwhy8715 thank you, was it similar to 0:29 in the video?
Pretty much, with a blueish tone across the horizon.
@@howwhy8715 thank you, before the beginning of astronomical twilight, is there a slight vertical light before it spreads across the horizon? if so how long for? and does it have a name? many thanks
This could be observed under specific atmospheric conditions. It is called a sun-pillar. You can find more here ua-cam.com/video/yjpDNBSJkMs/v-deo.html at 8:57 where I explain that phenomenon.
Why is astronomical twilight so dark? Also as soon as the horizon is visible nautical twilight begins. Why is that? (Please reply)
Hello there thanks for the comment. The camera I used is poor on low light so the astronomical twilight is not distinguishable from night-time. Then the nautical twilight occurs and it hapoens that my camera was *finally* able to catch the difference. I will make sure to do a better timalapse twilight video soon!
Thanks for replying! Now i understand...
How&Why please do upload a nice astro / nautical transition video. I know that it may need a very sensitive camera as the sun is very dim below 12degrees. But with crystal clear skies, up to around 14-15 degrees (from about half way thru the astro twilight you can start being able to see the horizon
I need a better camera to do it but I will surely do more timelapse!
I don’t even notice the difference anyways after at least half of Nautical Twilight except on the western horizon (I’m talking about in the afternoon after sunset btw) because there’s too much light pollution where I live and the sky is slightly/kind of dark blue, and it’s still kind of light even inside, plus I can see pretty much just fine outside even if I’m not standing near a street light.
Also, rn the moon is at 99.7% waxing gibbous & also above 70° altitude, so it makes it even brighter to barely even light blue, and it casts a short shadow on things similar to the sun when it’s high in the sky. Also, I read somewhere that the full moon (at the zenith) is the equivalent of the sun being 8.5° below the horizon.
Sir, "dawn" is technically defined as the moment when each phase of the respective twilight starts, not the sunrise.
It seems he made a mistake. Others commented that as well but he said it was a mistake. I agree with you though, dawn is not sunrise!
public dawn is when the sun -6 degree below the horizon, but Islamic dawn for al-fajr prayer is when the sun is at -9 degree below the horizon.
Thank you thank you thank you - this is exactly what I was looking for to explain this to my daughter.
by studying the video, it seems that astronomical twilight ends exactly at 5:47, which is the same time at which nautical twilight starts.
Пожалуйста напишите в каком городе и кого числа была сьёмка!
When you said dawn in the video, it was actually sunrise.
Dawn is when each stage of twilight starts, and it’s not just dawn, but rather the stage of twilight and then the word dawn.
So, Astronomical Dawn is when Astronomical Twilight starts in the morning/late night, Nautical Dawn is when Nautical twilight starts, Civil Dawn is when Civil Twilight starts, and then sunrise is when the sun gets to the horizon
As for after the sun sets in the afternoon/evening, Civil Dusk is when Civil Twilight ends, Nautical Dusk is when Nautical Twilight ends, and Astronomical Dusk is when Astronomical Twilight ends.
That is correct, it was a typo
How&Why ok
Spectacular, thank you.
How can you call sunrise dawn ttff
Indeed I wanted to write "Sunrise", as dawn happens before sunrise. Thank you for your feedback. Apologies for messing things up, I will make sure to make better videos soon!
How&Why Except that’s not what dawn is.
When you said dawn in the video, it was actually sunrise.
Dawn is when each stage of twilight starts, and it’s not just dawn, but rather the stage of twilight and then the word dawn.
So, Astronomical Dawn is when Astronomical Twilight starts in the morning/late night, Nautical Dawn is when Nautical twilight starts, Civil Dawn is when Civil Twilight starts, and then sunrise is when the sun gets to the horizon
As for after the sun sets in the afternoon/evening, Civil Dusk is when Civil Twilight ends, Nautical Dusk is when Nautical Twilight ends, and Astronomical Dusk is when Astronomical Twilight ends.
Bryan Reddy Fr
Is true fajr at 05:48am?
I'm here for the same reason 😃
Something is wrong. Sunrise on 3/20 at 38deg N is at 7:16, not 6:40. Even if you were on a mountain top.
It also depends on your longitude, time zone, and whether or not you have daylight shifting time, how much the daylight shifting time is, and the sun must also set earlier than the place that you’re thinking of at 38°N.
@@nabranestwistypuzzler7019 You might also be offset from the time zone. That also affects sunrise and sunset times.
Laiyemo Boys That’s why I said longitude
Thanks for the great video. So the nautical twilight is the first time that the horizon starts to become light? I confused if the light on the horizon is visible during astronomical twilight.
During the astonomical twilight the sky is lit above the horizon in the east. However this light is very dim and my camera wasn't able to catch it.
Is that light observable with a naked eye?
Yes it is. (You need to find the right timing before sunrise. That depends on your latitude. The closer to the poles the earlier before sunrise).
@@howwhy8715 do you see the redness in horizon during astronomical twilight phase i.e. before 12 degree below horizon time?
@@peacebeuponu I’m also intrssested in the same question…
Can you see any reddish white horizontal line across the horizon during the astronomical twilight or is that when the nautical twilight starts ?
This is an important question please answer 🫡
The reddish white horizontal line can be seen by the naked eye during astronomical twilight, although I believe at the start of astronomical twilight the horizon might in indistinguishable.
I can’t see light until 5:48 am even at max brightness.
Thank you. When is blue hour though? Is it part of the nautical twilight?
Hey! The blue hour is indeed a part of the nautical twilight at dawn/dusk. It occurs when the blue wavelengths of the visible spectrum (sunlight) dominate due to the ozone layer. This is a result of the Chappuis absorbtion.
@@howwhy8715 thank you for educating me :)
Astronomical twylight looks indistinguishable from night to me.
It is distinguishable with the naked eye.
I love summer nights when the sun sets at 8:30 and nautical twilight is a bit after 9 😮😌
Night Very Dark outside with Dark Black sky
Astronomical Twilight Dark Outside with
Dark Blue Sky
Nautical Twilight Dim Outside with Blue Sky
Civil Twilight Dim Outside with Light Blue Sky
Dawn = Sunrise
when it was still civil twilight i saw the sun sort of.
Yes me too
thanks for the video, but in which city did you film this?
It was recorded nearby Athens, Greece.
@@howwhy8715 Thank you for replying. I'm very interested in studying the three subcategories of twilight. After checking the twilight times for astronomical, nautical, and civil for Athens on the 20th of March I found that they vary a lot from what's the video. Why do you think so? maybe the camera couldn't capture what the bare eye can see?
Here is the link for the twilight times:
www.timeanddate.com/sun/greece/athens?month=3&year=2020
It was indeed the camera which couldn't capture the transition between night time and nautical twilight. Please bear in mind that the camera was at 500m altitude which changes the time of the phases. Thanks for asking!
How&Why i think most regular cameras cannot really capture the astro/nautical transition well as it is still too dark.From my naked eye (best attempt) observations I would say that a very dim glow of dark orange/blue is discernible from around when the sun is still 15-14 degrees below horizon (astrononmical twilight). And only under perfect clear sky conditions at that. More than 14-15 i suppose is nearly invisible except for star gazing being still made difficult. Once the sun rises to around 12 degrees though (start of its nautical phase) then as long as the atmospheric conditions are good enough, the glow becomes easily visible. Its pretty interesting this stuff
You are absolutely right.
Nice...
Do you have the location and date of when this was taken?
March 20th, Athens Greece
fromn which place this video is taken?
and at what time of the year??
March 20th, Greece
what city plz?
@@nadiaparveen7710
it seems to me that it is taken from the northern parts of Greece@@nadiaparveen7710
Can you provide latitude and longitude of the location?
Yes, it is 37.98°N, 23.83°E nearby Athens, Greece. As mentioned in another comment my camera was not the ideal for capturing the transition from night time to nautical twilight. But this is somethig I can do better in the future.
Is it nautical twilight true dawn?
Yes, and the Fajr time tables are based on astronomical twilight, which is incorrect
You have to convince some of your local ’ulama qualified to give fatwa to a country or state - to observe Fajr Sadiq - so as to verify the accuracy of timetables we have
Convincing them is the tricky part. Allah will help us to establish the truth. Let me know if you are successful in correcting the mistakes in the Fajr timetables
Equinox means equator line?
In short: Equinox is when a 24-hour day is split exactly to 12 hours of daylight and 12 hours of night-time. This happens two times a year because Earth is tilted.
Night Dark Outside with Dark Sky
Astronomical Twilight Dark Outside with Dark Blue Sky
Nautical Twilight Blue Outside with Blue sky
Civil Twilight Light Blue Outside with Light Blue Sky
Dawn = Sunrise
Dusk = Sunset
what about sunset phases
The sunset phases are the exact opposite of sunrise, but I will make sure to make a new video with them!
from the video I can assume that it has been taken approximately 26 october
Good guess, it was close at the equinox but the other way around! It was recorded on March 20th.
@@howwhy8715 what date in march?
and where exactly? preferably longitude and latitude
Hey guys.. any muslims here??..
Shouldn't the fasting time begin at the nautical twilight according to the Quran??..
In that video, if you see the first light (taghlis) at 05:48 , that was time for the 2nd call prayers. Finish our meal immediately, then start fasting and qobliyah. Hth
The name of City
Athens, Greece. I am preparing some stunning time lapse videos from across the UK!
What city and state or county is that pretty place
Astronomical Twilight - Dark outside with Dark Blue sky
Nocturnal Twilight - Dim outside with Blue sky
Civil Twilight - Bright Dim with Light Blue sky
Dawn = Sunrise
Dusk = Sunset
I consider it sunrise = dawn and sunset is dusk but..... not exactly HHAHAHAHA
The rich and smart and honest, choose their waking-hours at twilight-zone(hours), and region and country and locality(same as plants on slope) and river-rush-vector and wind-rush-vector... 风水。they also return home during the sunset twilight.
穷傻了 find excuses to take-advantage-of-others(穷傻了), milk-others-dry(穷傻了).
Minimum wage applies to, worker waking up during twilight, get dressed to the required levels($$), get to work($$), arriving in a suitable state($$), work at a suitable level($$), rest hours during work hours to maintain efficiency and productivity($$), finish work and find transport to get back($$), have enough time for life without maids($$), prepare for next day($$), maintain energy and rest and... for next day ($$)
Wants.?
Boss WANT many but cannot afford many