APOD: Eclipse under the Bamboo (2020 Jun 26)

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APOD: Eclipse under the Bamboo (2020 Jun 26)

Post by APOD Robot » Fri Jun 26, 2020 4:06 am

Image Eclipse under the Bamboo

Explanation: Want to watch a solar eclipse safely? Try looking down instead of up, though you might discover you have a plethora of images to choose from. For example, during the June 21st solar eclipse this confusing display appeared under a shady bamboo grove in Pune, India. Small gaps between close knit leaves on the tall plants effectively created a network of randomly placed pinholes. Each one projected a separate image of the eclipsed Sun. The snapshot was taken close to the time of maximum eclipse in Pune when the Moon covered about 60 percent of the Sun's diameter. But an annular eclipse, the Moon in silhouette completely surrounded by a bright solar disk at maximum, could be seen along a narrow path where the Moon's dark shadow crossed central Africa, south Asia, and China</a>.

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A vent

Re: APOD: Eclipse under the Bamboo (2020 Jun 26)

Post by A vent » Fri Jun 26, 2020 6:00 am

Sacred in the everyday. A garden of light and shadow.

rohhn

Re: APOD: Eclipse under the Bamboo (2020 Jun 26)

Post by rohhn » Fri Jun 26, 2020 9:26 am

I don't understand how this is APOD from all the far better submissions.

JohnM

Re: APOD: Eclipse under the Bamboo (2020 Jun 26)

Post by JohnM » Fri Jun 26, 2020 9:33 am

To see the an eclipse you need to look down - if you look up you are seeing an occultation or a transit !

Tszabeau

Re: APOD: Eclipse under the Bamboo (2020 Jun 26)

Post by Tszabeau » Fri Jun 26, 2020 9:40 am

That’s a lot of Cheshire cats.

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orin stepanek
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Re: APOD: Eclipse under the Bamboo (2020 Jun 26)

Post by orin stepanek » Fri Jun 26, 2020 1:11 pm

Eclipse-under-bamboos1024c.jpg
That's a lot of crescents! :mrgreen:
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Smile today; tomorrow's another day!

Sa Ji Tario

Re: APOD: Eclipse under the Bamboo (2020 Jun 26)

Post by Sa Ji Tario » Fri Jun 26, 2020 2:10 pm

Alicia would be lost among so many cat smiles and seeing the bamboo bush would think that the kingdom was far away and woke up in China.-
Now without a story, but I tell that as a child my first experience of a total eclipse of the Sun to date endures.-
We lived in an area somewhat far from the city center and in my house there were poultry, pigeons, fruit trees, and during the whole period the poultry climbed onto their perches in silence, the pigeons hurriedly returned to their nests and collided when they arrived. , these birds do not see at night and with the little light that filtered from the Sun they could reach their lairs, among the fruit trees the trill of the many birds that always populated them was silenced the house dog snuggled between the legs of my father and me between my mother's skirts. This instant became quantum because although it did not last more than 8 minutes, I lived it for an eternity because of the novelty, the sky was completely clear, something curious during an eclipse, I did not feel the normal temperature drop, or I did not realize and with the eyes, heart and skin I assumed my first total eclipse of the Sun.-
When the Moon gave way to sunlight, the natural cacophony of the mornings of my lares returned to its normality, the poultry chopping the grass, the pigeons to their random flights and the birds to chirp without anguish, that day I was not to school, because at 10.00 or so the great show was expected.-

jpb51

Re: APOD: Eclipse under the Bamboo (2020 Jun 26)

Post by jpb51 » Fri Jun 26, 2020 6:58 pm

I saw this same thing with the total solar eclipse here in Salt Lake City a few years ago -- a wonderful, fascinating effect that I will never forget (but didn't have a camera!) Thanks for the second chance.

Philippe

Re: APOD: Eclipse under the Bamboo (2020 Jun 26)

Post by Philippe » Sat Jun 27, 2020 12:15 pm

Hi,

don't understand how a pinhole could act as a lense system with an image focused exactly on the floor ?!
anyone can explain ?

best
Philippe

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Chris Peterson
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Re: APOD: Eclipse under the Bamboo (2020 Jun 26)

Post by Chris Peterson » Sat Jun 27, 2020 2:21 pm

Philippe wrote:
Sat Jun 27, 2020 12:15 pm
don't understand how a pinhole could act as a lense system with an image focused exactly on the floor ?!
anyone can explain ?
A pinhole lens doesn't have a focal length. It simply maps a point on one side to a point on the other side. So the image it produces is in focus at any distance from the hole. In essence, they have infinite depth-of-focus. (This is all modified slightly by the reality that no pinhole is a true point; the finite diameter of the hole complicates the conceptual principle. But in most cases, with fairly small apertures, this isn't too important.)

Also interesting is that while there is no focal length as such, there is an f-number. As with conventional lenses, that's calculated by dividing the focal length by the aperture diameter. But in this case, the focal length is simply the distance from the pinhole to the image plane... which can be any distance you choose.
Chris

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Cousin Ricky
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Re: APOD: Eclipse under the Bamboo (2020 Jun 26)

Post by Cousin Ricky » Sat Jun 27, 2020 5:25 pm

I’ve never seen this sort of photo during the annular phase. Does anyone know of any?

I have seen an annular eclipse, but I didn’t think to look down while it was happening.