Two Minute Read – Why Are Star Reflections in Water Elongated?

Why is the reflection of a full moon in the Snake River a stretched-out oval and not a round disk?

Why is the reflection of a full moon in the Snake River a stretched-out oval and not a round disk?

An interesting question came up during a recent NANPA webinar on “Chasing & Photographing the Aurora Borealis” presented by Carl Johnson.  Why is it that the reflections of stars, moon or sun in bodies of water always seem to have elongated shapes?  After all, when doing night photography, with a short enough shutter speed, the moon will be sharp and round; the stars will be tiny, sharp, points of light.  So why do they seem to stretch out when reflected in a lake, stream or pond?

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Weekly Wow! Week of September 17, 2018

All of this week’s Weekly Wow! images can be seen in the slideshow on the NANPA homepage at nanpa.org.

"Great Hornbill, Kaziranga, India"

Showcase 2018 Top 100 winner “Great Hornbill, Kaziranga, India” © Peter Balunek

The following Showcase images have been selected to appear on the NANPA home page for the week beginning Monday, September 17, 2018.

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PHOTOGRAPHER PROJECT – Dark Skies of West Texas, Story and photographs by Kathy Adams Clark

Satellite photo of United States at night.

Satellite photo of United States at night.

If you look at a satellite photo taken at night of the United States, you’ll see a recognizable shape. The coastlines are outlined in light. Major cities are clearly defined. Yet, out in far West Texas, there is a dark area void of major manmade lighting.

This huge dark area is being preserved thanks to a major dark sky preservation movement by local entities.

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