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#Post#: 12412--------------------------------------------------
Astronomy updates
By: Leslie Date: December 28, 2023, 8:50 am
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Astronomers are now saying that the age of the universe is
greatly underestimated.
HTML https://phys.org/news/2023-07-age-universe-billion-years-previously.html
#Post#: 12413--------------------------------------------------
Re: Astronomy updates
By: gwinnie Date: December 28, 2023, 12:20 pm
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… meanwhile, here in London, a 9 minute wait for a tube train is
considered interminably long.
#Post#: 12414--------------------------------------------------
Re: Astronomy updates
By: Leslie Date: December 28, 2023, 3:33 pm
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Very funny gwinnie!
And meanwhile my daughter and two grandchildren were due at
Pearson airport at 3pm for a three hour wait for a Air Transat
plane to San Hose in Costa Rica where they will stay until Jan
10th 2024.
Lucky them. It is grey, and rainy and miserable here.
EDIT
It is normal practice to have passengers arrive 3 hours ahead of
their flight to another country, including the close-by United
States. The big airlines insist on it.
#Post#: 12561--------------------------------------------------
Re: Astronomy updates
By: Leslie Date: January 1, 2024, 5:51 am
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Now that the latest theory is that the universe is 26.7 billion
years old, the problem of galaxies being more developed than
they should be which are 13.5 billion years old according to the
infrared observatory, disappears. They now have more time to
evolve.
#Post#: 12562--------------------------------------------------
Re: Astronomy updates
By: Gregory Date: January 1, 2024, 6:45 am
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Incredible photos of stars and galaxies taken by the James Webb
telescope. The sheer mmensity of the (known) universe is truly
mind-boggling and just impossible to grasp.
HTML https://www.bbc.co.uk/news/resources/idt-611525eb-3a0c-4a68-bf54-485df138b6f6
(Bumped this forward as I think just marvelling at the splendour
of the universe is enough for now for our reaction to these
photos. Dry facts may come later, not that we can at all grasp
the notion of billions of years either way anyway.)
#Post#: 12581--------------------------------------------------
Re: Astronomy updates
By: Stephen Horsfall Date: January 1, 2024, 9:44 am
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[quote author=Leslie link=topic=160.msg12412#msg12412
date=1703775025]
Astronomers are now saying that the age of the universe is
greatly underestimated.
HTML https://phys.org/news/2023-07-age-universe-billion-years-previously.html
[/quote]
SOME astronomers. It's in a newly-published paper, so it's
highly unlikely that all astronomers have fallen into line
behind the hypothesis. It may well gain support and be bolstered
b new observations, and be promoted from hypothesis to theory,
but it hasn't yet.
#Post#: 12606--------------------------------------------------
Re: Astronomy updates
By: Gregory Date: January 1, 2024, 3:19 pm
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Again, whatever the true facts, such numbers simply go over our
heads, just as the distances do. I mean, how can we start to
grasp the fact that the light from many stars and galaxies takes
millions of years to reach us, meaning that we are seeing them
as they were long before life appeared on our planet? Not to
mention those that are beyond visibility.
#Post#: 18212--------------------------------------------------
Solar eclipses
By: Leslie Date: August 10, 2024, 4:25 am
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What has the date of the last post got to do with it?
Astronomy is much older ;D .
Here are a few things you thought you knew but may have
forgoten:
"Our sun is exactly 400 times larger than the moon, and exactly
400 times closer to the Earth,so both celestial bodies have the
same apparent diameter in the sky of one half-degree; coequal
deities of the sky to the ancients."
"How come we don't have total eclipses of the sun every month?"
"The answer is that while the sun and earth are always in
perfect visua, alignment with each other, our Moon has an
elliptical orbit tilt to that alignment ( just under five
degrees) and it isn't in right orbital space time orientation
most of the time.
Do you know the 'synodic' period of a planet around the sun? One
forgets.(it is the period of time it takes for any celestial
object to return to the same sky position relative to the Sun
and Earth).
Acknowledgement to Robert C. Mazur , VA3ROM who wrote Radio
Magic for the Canadian Amateur July/August edition 2024
#Post#: 18735--------------------------------------------------
Re: Astronomy updates
By: Leslie Date: August 30, 2024, 5:01 am
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Not that anyone cares :but today from an old notebook of
September 19 of 1968 I write about the aberration of star light,
discovered by Bradley in 1727 .He found that stars (the sun on
his case ) in the plane of the ecliptic went back and forth
where the arc was 41 degree, but near the pole there was a small
circle. " in between it was an ellipse This was related to the
earth." The old note book was hand written by me in university
class and is difficult to comprehend today. He then went on to
discover the theory for the Parallax of stars, but it wasn't
proved to be correct until in 1838 Bessel (a German astronomer )
observed that star 61Cygni had a Lp = 0.30". For anything else
please look up,Wikipedia.
It is amazing that scientists of olden times had the time ,
interest and ability to do this, but they did.
#Post#: 18736--------------------------------------------------
Re: Astronomy updates
By: Gregory Date: August 30, 2024, 5:17 am
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On your concluding comment, I'd say it isn't really so amazing.
After all, what drives scientists is their insatiable curiosity
to understand the nature of things (the cosmos, matter, driving
forces, etc. etc.) and advance human knowledge to higher planes
of physical reality, from the ancient Greeks to our day.
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