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06-09-2022, 12:47 PM
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#61
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Site Team
Join Date: Dec 2017
Location: Mid Left Coast, California
Trailer: 2014 Escape 21
Posts: 5,155
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yeah, but I think the press has blown it out of scale.
the real news is, it took a bigger ding than expected, and its still performing better than the nominal expectations, and thats *before* they've characterized the damage and recalibrated the mirror that got pinged.
https://blogs.nasa.gov/webb/2022/06/...oroid-impacts/
and a fresh update today on science scheduling...
https://blogs.nasa.gov/webb/2022/06/...webbs-science/
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06-09-2022, 01:37 PM
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#62
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Senior Member
Join Date: Dec 2013
Location: Lancaster, Pennsylvania
Trailer: E 21 2019 Tow Vehicle: 2019 4Runner Limited
Posts: 740
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At 44 miles per second even a fraction of a grain of sand can cause damage.
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06-09-2022, 01:59 PM
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#63
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Site Team
Join Date: Dec 2017
Location: Mid Left Coast, California
Trailer: 2014 Escape 21
Posts: 5,155
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Quote:
Originally Posted by Telescopist
At 44 miles per second even a fraction of a grain of sand can cause damage.
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indeed. 44 miles/sec is 158400 miles/hour. earth orbital speed around the sun is about 30 km/s or 67000 MPH, so something in the same approximate orbit but the opposite direction would be doing easily twice that, and if its in a highly elliptical 'comet' style orbit, even more.
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07-13-2022, 01:00 PM
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#64
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Senior Member
Join Date: Feb 2020
Location: East of Austin, Texas
Trailer: 2021 Escape 5.0 / 2022 F150 SuperCab
Posts: 2,910
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The 'first images' have generated tremendously positive press for the Webb project, here's the NASA page for best viewing / download of 'em:
https://www.nasa.gov/webbfirstimages
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07-13-2022, 05:35 PM
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#65
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Senior Member
Join Date: Feb 2009
Location: Madison area, Wisconsin
Trailer: 2016 Escape 19 Chevy 2012 Express 3500 Van
Posts: 1,760
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It's a BIG, VAST Universe
The 5th image gave me goosebumps. That's a lot of galaxies, stars & planets in there. Trillions? Gazillions? And there's innumerable more out there in the heavens, just like in that image.
It always brings to me the BIG question. When will we rendezvous with others?
A game changer with that notion.
It's a big Universe. And we used to believe and think that the Earth was the center of it all. Good luck with that one. Kaput!
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07-13-2022, 06:00 PM
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#66
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Senior Member
Join Date: Oct 2008
Location: North Vancouver, British Columbia
Trailer: 2009 Escape 17B 2020 Toyota Highlander XLE
Posts: 17,136
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We are speck of dust in a piece of lint in the cuff of the universe.
__________________
What happens to the hole when the cheese is gone?
- Bertolt Brecht
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07-13-2022, 06:34 PM
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#67
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Site Team
Join Date: Dec 2017
Location: Mid Left Coast, California
Trailer: 2014 Escape 21
Posts: 5,155
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realize, those pictures are just 2-3 arcminutes wide. that's like 1/30th of a degree. a single degree circle has 2800 images like that in it. or, a circle the apparent size of the moon (0.5 degree) might have 700 images like that.
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07-13-2022, 07:11 PM
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#68
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Senior Member
Join Date: Feb 2013
Location: Santa Rosa County, Florida
Trailer: 2014 Escape 21 Tow: 2024 Toyota Tundra
Posts: 3,105
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Quote:
Originally Posted by John in Santa Cruz
realize, those pictures are just 2-3 arcminutes wide. that's like 1/30th of a degree. a single degree circle has 2800 images like that in it. or, a circle the apparent size of the moon (0.5 degree) might have 700 images like that.
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So, the width of the JWST images are about the angular diameter of a large crater on the moon, or crescent Venus, both seen with the naked eye.
__________________
Mike Lewis
She don't lie, she don't lie, she don't lie-- propane
Photos and travelogues here: mikelewisimages.com
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07-13-2022, 07:32 PM
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#69
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Senior Member
Join Date: Oct 2008
Location: St. Thomas not BVI., Ontario
Trailer: 2014 Escape 5.0TA / 2016 Ram Eco Diesel 4X4
Posts: 8,038
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Universal knowledge!!!
Quote:
Originally Posted by gbaglo
We are speck of dust in a piece of lint in the cuff of the universe.
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Hi: gbaglo... It all points to the fact that the more we know... the more we know... we don't know!!! Alf
escape artist N.S. of Lake Erie
__________________
Quote Bugs Bunny..."Don't take life too seriously, none of us get out of it ALIVE"!!!
'16 Ram Eco D. 4X4 Laramie Longhorn CC & '14 Escape 5.0TA
St.Thomas (Not the Virgin Islands) Ontario
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07-13-2022, 08:20 PM
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#70
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Senior Member
Join Date: Feb 2013
Location: Santa Rosa County, Florida
Trailer: 2014 Escape 21 Tow: 2024 Toyota Tundra
Posts: 3,105
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Quote:
Originally Posted by HABBERDABBER
It always brings to me the BIG question. When will we rendezvous with others?
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Possibly never. Do a search for "rare earth hypothesis" on Wikipedia. There you will find a rather detailed argument of why intelligent extraterrestrial civilizations are probably very rare. I haven't read the Rare Earth book, but I intend to. The "Anthropic Cosmological Principle" went into this for a bit. The authors estimated one intelligent communicating civilization per galaxy at any one time, as I recall. That makes sense to me.
__________________
Mike Lewis
She don't lie, she don't lie, she don't lie-- propane
Photos and travelogues here: mikelewisimages.com
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07-13-2022, 08:59 PM
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#71
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Senior Member
Join Date: Feb 2009
Location: Madison area, Wisconsin
Trailer: 2016 Escape 19 Chevy 2012 Express 3500 Van
Posts: 1,760
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Yes, but the odds
It is arguable that there is no intelligent life, even in our own Milky Way galaxy. (That includes Earthlings). But when you look at the vast, unimaginable scale of numbers of suns, planets and potential possibilities...well, I'm going with the odds, and the Drake equation. To traverse the distances for a rendezvous, well, I have no odds or notions on that.
With all this speculation, we simply do not know.
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07-14-2022, 03:45 AM
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#72
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Senior Member
Join Date: Jun 2020
Location: St. Louis, Missouri
Trailer: "Side Effect" 2022 21C
Posts: 1,374
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Our little Milky Way galaxy is a whopping 105,700 light years in diameter. (One Light Year is 6 Trillion Miles)
When you look at the SMACS 0723 imagine the scale of the universe is simply unimaginable.
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07-14-2022, 09:30 AM
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#73
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Senior Member
Join Date: Mar 2013
Location: n/a, Texas
Trailer: Escape
Posts: 729
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Rendezvous is a possibly never event because it involves travel. Detection through radio wave transmission is much more possible and cheaper. But we have been at that point of technology for only about 100 years. Somebody out there 70 light years away might now be watching Howdy Doody and deciding if it’s worth the effort to visit earth.
Since we are at the earliest stages of radio wave transmission and detection anyone we come in contact with is going to be much more technologically advanced than we are. If they are anything like humans that doesn’t bode well for us.
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07-14-2022, 03:03 PM
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#74
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Site Team
Join Date: Dec 2017
Location: Mid Left Coast, California
Trailer: 2014 Escape 21
Posts: 5,155
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remember, the universe is something like 14 BILLION years old. we were using steam power 120 years ago, and near earth manned travel is only like 50 years old. blink and you'll miss us. a billion is 1000 million, and a million years is 10000 centuries.
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07-23-2022, 08:08 PM
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#75
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Senior Member
Join Date: Mar 2021
Location: Ashland, Illinois
Trailer: Escape 5.0
Posts: 138
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Quote:
Originally Posted by Mike Lewis
Given that the JWST will be gathering data in the infrared, not in the visible spectrum like Hubble, the public may be disappointed in the resulting images. I'm sure NASA's well-oiled PR machine has come up with a workaround, though.
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I'm guessing NASA has the multi-million dollar version of Photoshop. Lol
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07-23-2022, 08:17 PM
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#76
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Senior Member
Join Date: Mar 2021
Location: Ashland, Illinois
Trailer: Escape 5.0
Posts: 138
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We are so miniscule
Quote:
Originally Posted by Centex
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Alan, we just got back from our inaugural trip with our 5.0. The California Redwoods made us feel so small and just a spec in time.
These Webb images are just too much to comprehend in terms of the immensity of the universe.
And to think, from early indigenous people, to adventurous explorers such as Lewis and Clark to us Escape owners looking up at the night sky over a camp fire -- all the far off things we never saw except in our dreams.
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07-23-2022, 09:06 PM
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#77
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Senior Member
Join Date: Mar 2021
Location: Richmond, Virginia
Trailer: 2022 Escape 21C
Posts: 269
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strucu
Quote:
Originally Posted by John in Santa Cruz
remember, the universe is something like 14 BILLION years old. we were using steam power 120 years ago, and near earth manned travel is only like 50 years old. blink and you'll miss us. a billion is 1000 million, and a million years is 10000 centuries.
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Yes, it's fascinating that there could be thousands (or billions) of alien life forms that developed and became excinct before we existed, and will likely come and go long after we are gone. Overall, we're just a tiny and temporary anomaly in the inevitable flow of the second law of thermodynamics.
That said, I'm still keeping my fingers crossed that my trailer will arrive this week, before our corner of the universe turns into amorphous molecular soup.
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07-23-2022, 09:41 PM
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#78
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Senior Member
Join Date: Mar 2013
Location: n/a, Texas
Trailer: Escape
Posts: 729
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The universe is 13.7 billion years old. But we can see light from 46 billion light years away in all directions. Yeah, right.
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07-23-2022, 10:19 PM
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#79
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Senior Member
Join Date: Oct 2013
Location: Nanaimo Vancouver Island, British Columbia
Trailer: 2015 17b "Shelly"
Posts: 459
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Quote:
Originally Posted by HABBERDABBER
It always brings to me the BIG question. When will we rendezvous with others?
A game changer with that notion.
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A Japanese mathematician by the name of Tomonori Totani did the math and concluded that we are it. I read a summary of his research and his conclusion was that there are no other life forms except us. At least in the visible (known) universe.
__________________
Like a lot of fellows, I have a furniture problem. My chest has fallen into my drawers
"Billy Casper"
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07-23-2022, 10:29 PM
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#80
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Senior Member
Join Date: Feb 2020
Location: East of Austin, Texas
Trailer: 2021 Escape 5.0 / 2022 F150 SuperCab
Posts: 2,910
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age vs distance (apples and oranges)
Quote:
Originally Posted by Viajante
The universe is 13.7 billion years old. But we can see light from 46 billion light years away in all directions. Yeah, right.
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Note that a light-year is a unit of distance-measure, not age-measure of the source of the 'light' (or radiation).
There's absolutely no contradiction in an object being 46 billion (or more) light-years distant in a ~13.x billion year-old universe (it was a VERY BIG bang).
Among the things astronomers hope to learn from WEBB observations and data is the age of certain distant objects, thereby enhancing understanding of the evolution of the universe.
It's quite likely (certain?) that many of the objects now extant 46 billion light-years distant were much closer and much 'younger' than 13 billion years of age when they emitted that light now striking WEBB (and in fact may no longer exist at all at the moment WEBB detects their light).
Space / time .... fascinating and puzzling stuff, eh?
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