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Just took this pic of sky from my front door, with some digital lens flare, too:

I picked them because I had a corresponding tile downloaded. I checked how many matches that tile remainder had with MNRAS 2022 final R. It was zero so I had to check if I made a mistake. Manual screening, using just source extractor pass 2...

Thank you for these clarifications.

We can always select star images that are not saturated. In the plates I got so far, very few stars are saturated, and these are accounted for by the data analysis software.

You are right that "stars do not have PSFs", in the sense that starlight gets first smeared by the atmosphere, and only then goes thru the telescope optics and is affected by the PSF. Because atmospheric smearing is orders of magnitude larger...

That's not a "region of the sky". It's as much a *time* as it is a place. And there are hundreds of billions of them in different places simultaniously, as there's hundreds of billions of potential observers.

Right, in those days no one even used the term "Schmidt telescope". The focal plane is not accessible from the outside. The Hamburg camera is almost an identical copy of the Palomar Oschin Schmidt camera.

They *are* routinely detected by large survey telescopes, to this day. And automatically thrown out as space junk. That's why it is important (from my viewpoint) to study them. If nothing else, they have to be removed so the actual astronomical...

I took this yesterday with my phone. A short window of great lighting before sunset.

Yeah I know. You don't need to convince me about Bob, I wrote this 5 years ago :) : Source: https://www.reddit.com/r/UFOs/comments/oyxuok/bob_lazars_story_is_it_believable_here_is_some_of/ The problem we have is this. The people pushing...

I did some shutter tests too. At 1/500 it's pretty sharp up to 3.5 m diameter, 145 m from camera, if it stood still. After that some motion blur will start showing.

Better questions: 1. Are contrails more noticeable at any particular time of day? a. Are contrails more noticeable in any particular part of the sky? As @Mendel noted, it's best not to lead AI, because of its regrettable tendency to follow your...

Pretty good summation of LLM "AI"

The more I ask it the more it gives me the impression of someone who doesn't know the answer but wants to appear like they do know the answer rather than say they don't know.

One of them, at least. And note that the claim was not initially made by the Hills. Betty's "Star Map" has now been "matched" to several different parts of space, depending on which parts of the map (or which real stars) you are willing to...