What is the Universe expanding into..

Do you think there was anything before the big bang?

  • I don't think there was anything before the Big Bang

    Votes: 56 12.5%
  • I think something existed before the Big Bang

    Votes: 200 44.7%
  • I don't think the big bang happened

    Votes: 54 12.1%
  • I think the universe is part of a mutiverse

    Votes: 201 45.0%

  • Total voters
    447
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They might not need one, but we can have an Inuit art calendar for a small outlay!
 

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They (the Inuit) don't need calendars to know what day it is.
Actually Pete, a quick bit of research reveals that the Inuit do have a calendar!

The Inuit developed an annual calendar that is populated by important details related to survival. The Inuit calendar is made up of six, sometimes seven, general seasons rather than our four seasons and they are referred to as: early spring, spring, summer, early fall, fall, and winter.
Science Break | October 2018 | CSEG RECORDER
 

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Perhaps you've seen the documentary Inuit Knowledge and Climate Change from 10 years ago, Pete.

New documentary recounts bizarre climate changes seen by Inuit elders - The Globe and Mail

The sun now appears to set many kilometres off its usual point on the horizon, and the stars are no longer where they should be. The Inuit believe that the Earth has actually changed its tilt.
The scientific explanation is that the warming Arctic air is causing temperature inversions, which in turn cause the light of the sunset to refract so that the sun appears to be setting a few kilometres off-kilter. But the filmmakers don't include that scientific explanation in the film, nor any other comments from the scientific community.
 
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I watched David Attenborough's 'Great Barrier Reef' yesterday. One of the episodes shows him discussing an aboriginal dance that describes how the sea came in and covered their hunting and fishing grounds which were where the GBR is now. Scientists have now discovered that the whole area was once marsh and wetlands and would have been a hunter gatherer paradise. Then the polar ice caps melted at the end of the last ice age, the whole region was inundated within a human lifetime and became the GBR, which is only about 10 000 yrs old.

The fact that the story above has persisted for 10 000 years in aboriginal culture I find absolutely fascinating. I would imagine Inuit culture will have similar folklore.
 
I am not going to spend too much time on crackpot theories about the Earth's Axis changing... nor UFO's, nor Bill Gates implanting us with microchips with Vaccines. Life is too short! 😀

Angular Momentum is always conserved, so the Earth's Axis cannot change without a corresponding change to the Moon's angular momentum. QED.

The Earth's Axis does precess over a period of 26,000 years. This means what is currently our North Star, Polaris was not always our North Star. In times gone by, even lovely Vega has done duty as North Star.

Way I figure it, if you lived in Portsmouth 13,000 years ago, Splendid Scorpio would be high in the sky in winter. Orion would have dipped below the horizon. Sirius too would be invisible.

Sorry about the poor image, but I always check this stuff with Patrick Moore's old book. The Observer's book of Astronomy. 🙂
 

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The position of the Sun as observed in the sky is worthy of further discussion.

Suppose you mounted a camera pointing up into the sky and took a picture once a week at noon, never moving the camera between shots.

The attachment shows what you would see if you stacked all the images on top of one another.

So, what's going on here? :scratch2:
 

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906599d1609426412-universe-expanding-sun-hawaii-jpg


Bit of a fanciful picture IMO.

Hawaii is on the Northern Tropic of Capricorn, about 23.5 degrees North of the equator, so the sun would be overhead at Noon in summer. It would be at 43 degrees up at Noon in winter.

The loopy 8 shape does surprise me though. The sun is always at it's highest, dead south AFAIK. And that is at noon, 12.00. 😕
 
TNT, you are messing with the big boys here! Don't get over-confident.

The whole point about odd-order filters like BW3 and BW5 is they DO have flat power response!

An entirely different solution to LR2 and LR4.



I seriously don't think you did your homework. You clearly didn't read and digest the Joe D'Appolito article in 12 minutes. 😱

I didn't have to. I have studied before. Your graph is on axis. Check the rest of 179x179 degres and you will understand.

But its OT here...

HNY!!

//
 
That graph is an LR4 24dB/octave style:

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Above and below axis you get a suckout at crossover. It only outputs half power to the room at crossover. It also noticeably has an impedance peak at crosover.

Butterworth is 18dB/octave and when phase aligned produces a 3dB peak. Surprisingly the power output to the room is flat. The impedance is also flat. The trick is to use 90 degree phase at crossover, then the frequency response on axis is also flat.

679721d1525933335-differences-tweeters-sound-crossover-600px-linkwitz_vs_butterworth-svg-png


An MTTM style is an even better idea IMO, here done with a ribbon in effect, cylindrical dispersion giving that nice PA sound:

733281d1549059344-speakers-parallel-serial-wagner-net-au-kit-260-5-inch-mtm-jpg


Of course, you trade off lobing for combing. BW3 has a very natural delivery IMO. The BBC were keen on it. HNY to you too.
 
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