For perfect photography, a photographer must know how long after sunset does it get dark. Darkness and a clear sky are two very important aspects for photographers as well as astronomers. We all know the sun rises and sets each day. Today, in this post, I’ll tell you how long after the sunset does it take to get dark. You will also find here different types of twilight in detail. Make sure you do not forget to check out why it takes longer to get dark. You can keep on reading further to find out how long after sunset does it get dark.
How Long After Sunset Does It Get Dark?
After sunset, it takes roughly about 70 to 140 minutes to get dark. The earth experiences different seasons such as winter, summer, autumn, and spring. Therefore, sunset is viewed at different times and directions.
Below, I’ll tell you how long after sunset does it get dark in California, Los Angeles, New York, Dallas, Pennsylvania, and Florida.
| City | Time |
|---|---|
| California | 70 to 100 minutes |
| Los Angeles | 70 to 100 minutes |
| New York | 70 to 140 minutes |
| Dallas | 70 to 100 minutes |
| Pennsylvania | 70 to 100 minutes |
| Florida | 68 minutes |
Twilight And Its Types
By far, you have got to know how long does it get dark after sunset. Do you what is twilight? It is a time period right before nighttime. Usually, twilight starts when the sun is setting. There are three phases of this time period.
You can keep on reading to check out all the three phases.
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Civil Twilight
Civil twilight is the first phase observed during the sunset. It starts when the sun reaches around 6-degree below the horizon. In fact, civil twilight is the perfect time to track or view Mercury and Venus. You’ll notice a little light pollution in the sky during this phase.
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Nautical Twilight
The second phase is the nautical phase. Nautical twilight starts immediately as soon as civil twilight ends. During this phase, the sun reaches around 12-degree below the horizon. You can easily determine this phase by looking at the color of the sky. You’ll see the sky has turned a dark blue shade.
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Astronomical Twilight
The last phase is astronomical twilight. This phase starts when the sun reaches 18-degree below the horizon. During this phase, you’ll observe a small amount of light pollution near the horizon. In fact, you can easily see celestial objects clearly.
You must be wondering at what time does it get completely dark? As soon as the sun passes 18 degrees below the horizon, the night phase starts. On average, it takes about 70 minutes to get fully dark after sunset.
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Factors That Determines The Time Of Darkness After Sunset
Usually, the northern hemisphere observes sunset in the northwest direction. On the hand, the southern hemisphere observes sunset in the southwestern direction. There are four factors that help us to determine how long after sunset does it take to get dark.
Here, are the four factors you have to keep in your mind to get the time of darkness after sunset.
- Latitude: You’ll observe sunset quicker if you are closer to the equator.
- Season: In winters, you’ll observe it takes less time to get dark as compared to summers.
- Solstice: Usually, Solstices happen when the earth’s axis tilt from the sun is at its maximum. It marks either the longest day of the year (in June) or the shortest day of the year (in December).
- Equinox: When the daytime equals the nighttime, it is known as Equinoxes. This happens only when the center of the sun is right above the equator.
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FAQ
How Long Does It Get Dark After Sunset?
In summary, for the 48 contiguous states, it takes anywhere from 70 to 100 minutes for it to get dark after sunset. The further north you are, the longer it takes for true darkness to arrive after sundown.
Is Light Still After Sunset?
Twilight happens twice every day, once before the sun rises as the sky is getting light, and again after sunset before the sky is truly dark. Earth’s atmosphere scatters the sun’s rays to create the colors of twilight. On worlds with no atmospheres, such as the moon, it gets instantly dark when the sun sets.
What Is The Light Called After Sunset?
In its most general sense, twilight is the period of time before sunrise and after sunset, in which the atmosphere is partially illuminated by the sun, being neither totally dark or completely lit.
How Long Does It Stay Bright After Sunset?
So How Long Does It Take to Get Dark after the Sunset? In short, it takes somewhere between 70 and 140 minutes for the Sun to go past 18º below the horizon and reach the night phase. However, closer to the equator, the timeframe would be around 23 minutes.
Which Country Has Last Sunset In The World?
Samoa! As you may know the international date line is as crooked as the contents of a badly packed suitcase, and Samoa, once known as the last place to see the sun set, is now the first place on the planet you can see the sun rise. This makes it’s neighbour American Samoa the last.
In Which City In India Sun Sets First?
Therefore the sunrise is first seen in India by Arunachal Pradesh at Dong, while sun rises last at Gujarat in Guhar Moti.
Why Is There Still Light After Sunset?
To put it simply, even when the sun as disappeared below the horizon it is still emitting light. The emitted light is still traveling towards the earth. These waves are received by our eyes – hence the light after sunset.
Conclusion
From my above article, you got to know how long does it take to get dark after sunset. It takes anywhere from 70 to 140 minutes to get dark after sunset. However, this time may vary due to some factors such as season, latitude, solstice, and equinox. If you want to know at what time does it get completely dark today, you can use a generic astronomy calculator. This calculator helps to calculate times for sunrise, sunset, moonrise, and moonset based on your current location/city. Once you understand how long after sunset does it get dark, you can observe the beautiful colors of the sky!
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How long does it take to get completely dark after sunset