Note that twilight sky, white T-Shirt, white LED's, etc. etc. are typically far from ideal, yet most often normalize most of the calibration gremlins well enough to satisfy us guys here. If you decide to hop over to the quantitative astrometry side of the fence --- meticulously represent...
The hungry bear followed his nose to our camp,which was surrounded by a high wire fence.He pulled and bit the wire.He stood on his back legs and pushed at the wooden fence posts. Terrified,Elli and I tried all the bear defense actions we knew.We yelled at the bear,...