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A 26,000-year astronomical monument hidden in plain sight (2019)

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Re: A 26,000-year astronomical monument hidden in plain sight (2019)

#82
post #78
post #60

Earlier quoted context omitted.

I'd have to look at what it looked like before, but when I visited there earlier this month, I didn't see any restoration in progress and the star map was open. I didn't take a ton of photos in that area, and here are the only two of the monument I grabbed: https://photos.app.goo.gl/qgJ3x5za82EiFz5P7

This is the second-best way to doxx HN users I've ever seen.

And the best way is...?

Re: A 26,000-year astronomical monument hidden in plain sight (2019)

#83
post #77
post #57

Earlier quoted context omitted.

Out of curiosity were the positions (especially of the Galilean moons) actual simultaneous positions, or positions as seen from Earth, given the ~40 light-minutes distance between the Earth and Jupiter?

Very good question! I believe they are simultaneous positions. Skyfield has facilities to calculate the light propagation adjusted position but i didn’t use them. Would you have? Is one more “correct” or more likely to be anticipated by future sentients? I’m always unsure about ther design details. Also there is an other skewiness. Because obviously the drawing is not to scale the moon position can be correct from th…

Wow such a great answer, thanks for sharing the thoughts that went into this. It's crazy that there are so many considerations when taking into account the limited speed of light.

Re: A 26,000-year astronomical monument hidden in plain sight (2019)

#84
post #52

Earlier quoted context omitted.

If you have a blog post with a few more technical details, it may be a nice submission for HN. (Do you have a few photos of the intermediate steps to share?) Some ideas/questions: How is it painted? Is it laser cut or by hand? Did you designed it? How did you do the calculations? Does Saturn have rings? Where is the cutoff? (No Neptune/Uranus/Fobos/Deimos/...) Have you tried to give a different size to each planet? P…

> If you have a blog post with a few more technical details, it may be a nice submission for HN. Oh. That is very kind of you. I do have many more pictures and details. I will try to collect them together, and will publish it once it is done. But can’t promise that it will happen soon. So i will answer your questions here in the meantime. > How is it painted? The shapes are recessed and the recesses are filled with b…

> On my instagram the last reel i posted is showing that process, even though with a different design.

Permalink: https://www.instagram.com/cogs_and_curios/reel/DTNtEFPjEGQ/

> And i wanted the inner planets and the Moon so people and future alien minds will recognise it as the solar system.

I think it was successful.

Re: A 26,000-year astronomical monument hidden in plain sight (2019)

#85
post #83
post #77

Earlier quoted context omitted.

Very good question! I believe they are simultaneous positions. Skyfield has facilities to calculate the light propagation adjusted position but i didn’t use them. Would you have? Is one more “correct” or more likely to be anticipated by future sentients? I’m always unsure about ther design details. Also there is an other skewiness. Because obviously the drawing is not to scale the moon position can be correct from th…

Wow such a great answer, thanks for sharing the thoughts that went into this. It's crazy that there are so many considerations when taking into account the limited speed of light.

The speed of light is most frustrating. I find myself alternately wishing it was infinite or slowed down to 'disc world speeds' depending on which of the two would make my current project easier.

Re: A 26,000-year astronomical monument hidden in plain sight (2019)

#86
post #24

But is the star map there? This article seems to imply that it got demolished in 2022: https://www.oskarjwhansen.org/news/save-the-star-map If so that is somewhat ironic. A message intended to communicate a date to thousands of years into the future got demolished a mere 86 years after its creation due to a drainage issue and a contract dispute.

On Google maps, someone posted a photo from 9 months ago, explaining the restoration.

Re: A 26,000-year astronomical monument hidden in plain sight (2019)

#87

[flagged]

> Leading zeros don't do what you think they do It's has been pretty normal for clocks with digital displays to include leading zeros for seconds, minutes, hours and/or days for about a century. Doing the same for years, while unusual, doesn't seem particularly confusing. And of course, there is precedent with things like ISO86011 - where 0400 is the year 400 CE. I'm not sure why one would assume it was a truncation…

IS086011 or 15O86O11 to be less precise.

Re: A 26,000-year astronomical monument hidden in plain sight (2019)

#88
post #78
post #60

Earlier quoted context omitted.

I'd have to look at what it looked like before, but when I visited there earlier this month, I didn't see any restoration in progress and the star map was open. I didn't take a ton of photos in that area, and here are the only two of the monument I grabbed: https://photos.app.goo.gl/qgJ3x5za82EiFz5P7

This is the second-best way to doxx HN users I've ever seen.

[deleted]

Re: A 26,000-year astronomical monument hidden in plain sight (2019)

#90
post #27

I have once created a pendant to my friends’ wedding following a similar idea. A silver disk engraved one one side with the position of the planets and major moons at the moment of the ceremony. Fun thing is that the Galilean moons orbit fast enough that you can even read the intended minute. https://www.instagram.com/reel/DIpFTPOIP60/

If others are interested in getting something like this — there's an Australian firm already doing a good job at scale (but slightly different to parent).

https://www.thenightsky.com/

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