Talk:2524: Comet Visitor

Explain xkcd: It's 'cause you're dumb.
Jump to: navigation, search

Yup. nobody says that the Dinosaur Killer wasn't aliens saying "don't get cocky, lifeforms". Best to keep the head down. 06:53, 5 October 2021 (UTC)

AFAIK cosmonauts reported that the Great Wall of China actually isn't visible from space - it's too thin and blends in with the background. Though technically we can probably claim that everything visible on Google Satellite View qualifies as "visible from space"... 09:10, 5 October 2021 (UTC)

This somehow seems like the perfect setup for a "Your mom" joke. 20:49, 7 October 2021 (UTC)
If it were satellite view all along. It's aerial view for the higher zoom levels. BTW, anything on Earth is visible from space, provided there's equipment with sufficient resolution, selectivity and sensitivity vs. distance. From Saturn, well, it needs truly alien equipment to see anything of concern, no big worries. Sweep it under the rug and smile. Send some hello's over Arecibo... ah, crap. -- 10:29, 5 October 2021 (UTC)

Should we also mention that the Great Pacific Garbage Patch isn't visible AT ALL, even to humans who might be swimming in it? From Wiki: Despite the common public perception of the patch existing as giant islands of floating garbage, its low density (4 particles per cubic meter) prevents detection by satellite imagery, or even by casual boaters or divers in the area. This is because the patch is a widely dispersed area consisting primarily of suspended "fingernail-sized or smaller bits of plastic", often microscopic, particles in the upper water column known as microplastics. mezimm 13:46, 5 October 2021 (UTC)

Although perhaps obvious, I feel like this is Randall trying to provide motivation to clean up the Earth (eg. Global warming and what not) in general, but making it kinda fun instead of doomsday scenarios. Might be useful to mention in body of explanation. Stephenjuniverse (talk) 14:00, 5 October 2021 (UTC)

Possibly, but it could also be prompted by the plan to deploy lots of Starlink satellites that interfere with astronomy. And increasing concern over all the space junk in orbit. We're just messy on many levels, like a teenager who never cleans up his room. Barmar (talk) 14:28, 5 October 2021 (UTC)
That's a fair point. Stephenjuniverse (talk) 14:20, 6 October 2021 (UTC)

Regarding the visibility of the Great Wall, it is possible that the chain of geographical significant boundary features (upon which the wall was built, beacause it was a convenient definable and defendable ribbon of terrain to make a claim over) are notably visible. As might other (unrelated, unWalled) geographies/geologies, but you're not looking at those bits 'imagining' you can see the Wall and seeing man-made patterns where there should be none. (Also, if settlements and/or transport links roughly hug one side or the other of the vague and intrinsically non-visible route, for historical or recent reasons, they might add 'relief' enhancement to the scene by whatever geophysical 'smudged marks' they display to the orbital viewer. A bit like Belgium's borders are made very visible at night due to the legislatedly ubiquitous street-lighting, compared to its neighbours, or North Korea by the inverse effect - but especially against its southern neighbour.) 18:28, 5 October 2021 (UTC)