What is an analemma?
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| Image credit: en.wikipedia.org |
What is an analemma?
If you look at the sky everyday from the same location and at the same time, would the sun be at the same position??? If the Earth didn't ever had its 23.5 degree tilt, and if Earth's orbit was perfectly circular, then yes. It would. However, due to the combination of Earth's tilt and its elliptical orbit, an 'eight' figure of where the sun would be throughout the year is generated. The snapshot of such a pattern is called as an analemma.
The first ever analemma was photographed by photographer Dennis di Cicco over Massachusetts in 1978-79. He took 52 photos almost a week apart at the same time without moving his camera.
How does an analemma vary?
Depending on one's geographical latitude, the loop will be inclined on different angles. Even the time of clicking the photos determines the inclination. However, an analemma can be useful to study the sunrise and sunset timings. It is also used to study solstices and equinoxes. But studying analemas is difficult as there are many considerations to be done.
What are other types of analemmas?
Then there is something called as tutulemma. It is nothing but an analemma captured with a solar eclipse in it. Tutulemmas are very rare. Then there is also a term called as a Lunar analemma. It is the analemma of the moon from Earth. It is easier to capture but very hard to understand.
Analemmas are also seen from all other planets as all the planets have their own axial tilt, own orbit and own eccentricity.
Posts before October 2021 have been marked as "Old Posts". Less likely, but they might have out dated or incorrect information, ugly looking bits of code, no labels, etc. Don't get me wrong, many of these posts are top-notch and interesting too.
I thought it would be better not to delete or revamp these posts, even if they suck. The bitter truth is that old works always suck, but I take that as a positive tool to convey that I am growing. Besides there's no better way to showcase my journey without these old, messy, poorly written posts!
I thought it would be better not to delete or revamp these posts, even if they suck. The bitter truth is that old works always suck, but I take that as a positive tool to convey that I am growing. Besides there's no better way to showcase my journey without these old, messy, poorly written posts!
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