Explanation: Can a lighthouse illuminate a galaxy? No, but in the featured image, gaps in light emanating from the Jose Ignacio Lighthouse in Uruguay appear to match up nicely, although only momentarily and coincidently, with dark dust lanes of our Milky Way Galaxy. The bright dot on the right is the planet Jupiter. The central band of the Milky Way Galaxy is actually the central spiral disk seen from within the disk. The Milky Way band is not easily visible through city lights but can be quite spectacular to see in dark skies. The featured picture is actually the addition of ten consecutive images taken by the same camera from the same location. The images were well planned to exclude direct light from the famouslighthouse.
orin stepanek wrote: ↑Tue Nov 19, 2019 12:01 pm
LighthouseMilkyWay_Salazar_960.jpg
Interesting picture; even though it is a composite!
I would not call this picture a "composite". Summing a series of consecutive images is merely a stack- a technique for making a longer exposure than a camera otherwise supports. If the exposure times are changed to increase dynamic range (I don't know if that's the case here) it's a form of HDR processing. Still not composite.
A composite image would have different elements in different frames, and all the frames wouldn't necessarily be captured at the same location or in the same direction.
Chris
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Chris L Peterson
Cloudbait Observatory https://www.cloudbait.com
Milky Way over Uruguayan Lighthouse
I wasn't sure what to say myself. You summed it up perfectly! 
