eclipse

The upcoming solar eclipse will be total over a 70-mile wide swath. It is an astonishing circumstance that the outline of our only moon is almost exactly the apparent diameter of the sun.

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John Larkin   Highland Technology, Inc   trk 

jlarkin att highlandtechnology dott com 
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John Larkin
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If you surf you'll find a discussion on that.

The moon is increasing its distance from it to Earth by (IIRC) ~1.5" per year.

RSN (like a few millennia) it won't be possible to have a full eclipse. ...Jim Thompson

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| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
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Reply to
Jim Thompson

Den mandag den 7. august 2017 kl. 22.34.17 UTC+2 skrev John Larkin:

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Reply to
Lasse Langwadt Christensen

The further away it moves, the less will be the effect on tides and tidal surges. Should take some ammo off the global moaning brigade and their catastrophic flooding bitching.

Reply to
Cursitor Doom

Obviously you give them too much credit. Anthropological Moon Distancing is the next big crisis.

Reply to
Taxed and Spent

Lasse Langwadt Christensen wrote on 8/7/2017 5:00 PM:

A friend's farm is directly in the center of the path of the umbra. I'll be watching there. I may try to construct a camera obscura for viewing.

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Rick C
Reply to
rickman

AGW... now AMD... what will they think of next ?>:-} ...Jim Thompson

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| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
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Reply to
Jim Thompson

I'll be about 25 miles North of Nashville for viewing, after that I'll continue North to Michigan and visit relatives.

Mikek

Reply to
amdx

Then it'll lose more energy, get closer, and eventually CRASH INTO THE EARTH! RUN! WE'RE ALL GOING TO DIE!

Reply to
krw

During totality, it's perfectly safe to look directly at the eclipse. To be on the safe side, us UV blocking glass but otherwise it's perfectly safe. I've watched a total eclipse through a 2.5" telescope with no filters. Set a timer to make sure you don't accidentally look at the "diamond ring", though. Not good.

Reply to
krw

If it's decent weather, I think I'll do a daytrip to N. Carolina and camp out in a parking lot somewhere.

Reply to
krw

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Actually 650 million years, though the proportion of annular eclipses will increase steadily until complete eclipses vanish forever.

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Bill Sloman, Sydney
Reply to
bill.sloman

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Quite few millenia - 650 million years.

The moon is actually moving into a higher orbit, rather than a lower one - it's moving away by roughly 40mm per year.

Krw rarely dispalys his cognitive deficit quite so clearly.

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Bill Sloman, Sydney
Reply to
bill.sloman

Super Walmart is right at the exit I plan on stopping at. There are several restaurants very close so, we plan on getting there early and eating. If we have any delay, then hopefully we will still get there early enough, then eat later.

Mikek

Reply to
amdx

I'll be about 100 miles east of there.

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Rick C
Reply to
rickman

It is none-the-less a coincidence and only true for a part of the orbit so at other times you get annular eclipses when the moon is further away from the Earth. If you can get to the total eclipse track I would urge you to see it for yourself - it is a spectacular phenomena to witness totality. Shadow bands in the final thin crescent phase, transient winds and confused night creatures flying around afterwards. Aim for the centre line to see the longest total eclipse ~2 minutes this time.

Several million more years and tidal drag will have moved the moon too far away from the Earth to ever give a total eclipse. More than you are ever likely to want to know about eclipses and the lunar orbit at:

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Unfortunately it is quite old and doesn't cover this years event.

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Regards, 
Martin Brown
Reply to
Martin Brown

The really dangerous phase is when there is a thin sliver of photosphere visible but most of the sun is obscured by the moon. Your eye's iris is wide open because there isn't much light remaining but the photosphere surface brightness is just as high as for a full sun. People make the mistake of staring directly at it and get characteristic crescent shaped retinal burns which only show up very painfully a few hours later.

It is entirely safe to look at the sun with a telescope during totality but you must set an alarm to avoid being caught out! You must never look at the photosphere through a scope directly without appropriate filters (and some common toy scope kit solar filters may be unsafe). The ones that attach to an eyepiece may suddenly crack without any warning.

Projection onto a screen is a safe way to watch the progress of the early stages of an eclipse.

Most eclipses there are disposable filter glasses on offer or Baader solar film for telescopes (photographic and visual grades) eg

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They tend to sell out of this stuff immediately before one.

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Regards, 
Martin Brown
Reply to
Martin Brown

I live in Idaho about 30 minutes away from the peak of it. We've made came ra obscuras and have the proper glasses as well. Very much looking forward to it. I was living in Boston in 1994, so got to see that one and I'll ne ver forget it.

Our biggest worry is the influx of out-of-state visitors. There are basical ly two roads that can be used, and both are windy two-lane mountain roads. A breakdown in any of many long stretches will completely shut down traffi c as there are no shoulders, just cliffs. The local news is predicting dis aster and imploring everybody to have 3 days of food and water on them!

Reply to
DemonicTubes

Well, here's a short list of assorted global catastrophes worthy of exploitation. Some are man made and can therefore be used to support a giant guilt trip, to redistribute the wealth, and for political purposes. Fortunately, none of the prospective catastrophes are likely to be serious, as indicated by the lack of suitable acronyms, which are required for anything of importance[1].

There are already organizations in place to research the problem:

Of the man made technological potential disasters, I don't believe any of them are likely because technology is self limiting. Despite good intentions, advances in technology tends to create unemployment. The unemployed are a serious problem to governments, which will likely blame technology for every conceivable problem. The governments will then pass laws that limit the use and spread of technology in an effort to "create jobs", which will likely push the world into another dark age. Technical progress and research will cease. Manual labor, subsistence farming and glorified poverty will be the next big things.

If your busy schedule does not permit participating in a global catastrophe, this calendar of predicted apocalyptic events might help:

If you feel the need to experience a global catastrophe, there are a variety of movies and videos which might help:

[1] The current fashion is to append "exit" to everything instead of contriving a suitable acronym. "HomoExit", "ExitUS", or "*.*exit" might be acceptable substitutes.
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Jeff Liebermann     jeffl@cruzio.com 
150 Felker St #D    http://www.LearnByDestroying.com 
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Jeff Liebermann

It's an amazing experience to be in the area of totality before, during and after an eclipse. Lots of stuff happens you wouldn't expect if you've only ever watched this phenomenon on TV (which doesn't remotely do it justice). I really must make the effort to see at least one more before I pop my cloggs.

Reply to
Cursitor Doom

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