Author Topic: Astronomy/cosmology questions...  (Read 56428 times)

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Offline Geo

Re: Astronomy/cosmology questions...
« Reply #345 on: May 16, 2023, 02:30:06 pm »
Looks a beautiful gadget. But quite expensive.
It does reminds me of a Kickstarter Project (i-Brix) where with similar technology they wanted to produce wirelessly Powered Lighting.
It was funded, test sets were sent out to reviewers, and some backers accually received their order, but the thing appearantly didn't come off the ground.

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Re: Astronomy/cosmology questions...
« Reply #346 on: Today at 02:10:29 pm »
Lori, what's going on with your space career these days?


---

And you're familiar with the season ender of Doctor Who, I assume, when 12 Dr. was trapped in the Panopitcon and something something TARDIS destroyed all the stars in the visible universe in 1066 or something, avec little whirlpool spirals faintly showing...  And the next season began with child Amy Pond in the new timeline w/ a starless sky, and people didn't believe there used to be stars in the sky up to a thousand years ago, naturally.  (TARDIS in the Sun's position w/ some 'splody effect exactly replacing the Sun.)

SO - that's a LOT of rubber comic book "science" to unwrap.  I can neatly rationalize all visible stars in the sky going out simultaneously from earth POV by postulating an anti-time effect traveling back at lightspeed, ignoring the instant impossible whirlpools.  How it puts out the stars, fusion and glow/heat, no.  The whirlpools visible at a minimum of 4.something LYs, never.  -And that's even if we were shown the southern hemisphere view, which would account that much for one.-  Where the mass of the Sun went, no.  Maybe it was still there, lit by the Tardis, but why no whirlpool?  Something something origin point, never mind the Sun.

I've been idly trying to work out this into something that makes ANY sense for YEARS.  Yes, I know.

Lori, how much of the universe, we're assuming a minimum case for naked-eye visibility for people on Earth's surface, had to destruct to achieve the minimum?

-The rest is less brain-straining stuff about alternate history and sailing-ship navigation but I'll post this much now.  I really want your thoughts.  -And everyone's who wants to play, of course.


Offline Lorizael

Re: Astronomy/cosmology questions...
« Reply #347 on: Today at 02:58:57 pm »
I don't regularly watch Doctor Who, just catch bits from time to time, so I've never heard about this. But, uh, naked-eye visibility of stars doesn't even cover the whole galaxy. A smattering of very big, very nearby extragalactic objects are visible in very good conditions (Andromeda, the Magellanic Clouds). So, say, you'd need to wipe out the Local Group.

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Re: Astronomy/cosmology questions...
« Reply #348 on: Today at 03:25:05 pm »
Answered, makes sense,  thanks.



I do wonder about how huge the handwave would have to be to have history unfold the same way since 1066.  Very huge, obviously, but I wonder about how much one could fudge the sea navigating by the position of the moon and planets w/ very good almanacs and such.

No, seriously; there ought to always be a few planets naked-eye visible in the night sky, and much easier to use for that w/o any stars.  We'd actually tend to know a lot more about the planets w/o all the stars making them hard to distinguish/ find, astronomy still developing for all the same reasons, QED..

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Re: Astronomy/cosmology questions...
« Reply #349 on: Today at 03:35:43 pm »
-But any Astronomy worth mentioning would make Amy's mom and teachers not believing in stars REALLY hard to handwave - and VERY hard to believe nobody invented telescopes in that timeline for, again, all the same reasons...

 

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