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Hmmm, written that way, it calls to mind: In Dante Alighieri's The Divine Comedy, the City of Dis (Italian: Dite Italian pronunciation: [ˈdiːte]) encompasses the sixth through the ninth circles of Hell. Moated by the river Styx, the fortified...

Hi Jennifer, you might find useful the following FAA video on the subject. Source: https://www.youtube.com/watch?v=O-2Zgcen0pA

Closure of the sixth to ninth circles of hell, if you believe Dante. Presumably someone's made a private booking for a party there. Punished within Dis are those whose lives were marked by active-willed and obdurate, rather than venial sins:[15]...

DIS-closure is obviously the opposite of closure. In other words, instead of being a final, satisfying answer, "We're going to keep the mystery going as long as this cash cow keeps giving milk". ;)

Thanks @john.phil and @Ann K for fixing the citing in my post. I should have included a direct link to the video like john, but I forgot to source it all (thanks to Ann for pointing that out!). I rate my source citing as 0/10. Worst. Citing...

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...

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...

As far as I know, they *are* being detected. They are just throw away by the automatic data processing pipelines, or by the astronomers themselves, as the standard explanation for them is space junk. Modern survey observatories like Rubin and...

Catalog matching was done. That can be tested: three MNRAS 2022 datasets are published here: http://svocats.cab.inta-csic.es/vanish/ Select the list of vanishing objects in POSS I red images (5,399 rows) and perform a cross-match against Gaia and...

I understand the Palomar plates aren't available because of policy issues. They are seen as irreplaceable assets. The Applause plates might be available for physical inspection though.

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...

So far, I have found 63 candidate transients, out of 50 plates analyzed. Many more are still being worked on, and I don't expect to have a comprehensive data set and analysis for a long time still. As for that one pic, it is for illustration...

See Solano(2022). https://academic.oup.com/mnras/article/515/1/1380/6607509?login=false This is explained upthread. Vilarroel references that paper, but it's unclear which of the steps have been applied to her data set, since it doesn't match...

The worst part of exploring the underground city will be the shoggoths… :eek:

Biondi now found a second Sphynx. His idea is that there is some kind of symmetry on the Giza plateau, which would have another Sphynx at a certain location. And indeed exactly there is an elongated elevation. He scanned the area and came to the...