Forum: Amateur Astronomy
March 7th 19, 10:49 PM Posted to sci.astro.amateur
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Replies: 9
Views: 1,818
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Forum: Amateur Astronomy
March 7th 19, 05:49 PM Posted to sci.astro.amateur
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Replies: 31
Views: 8,858
Canada Joins Lunar Gateway
Chris L Peterson:
I tend to believe that the U.S. is a failed (or failing) nation... a
problem that ultimately goes back to a flawed Constitution, one which
created the Senate, one which...
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Forum: Amateur Astronomy
March 5th 19, 11:10 PM Posted to sci.astro.amateur
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Replies: 31
Views: 8,858
Canada Joins Lunar Gateway
Chris L Peterson:
In the end, it probably comes down to our sense of fairness, and our
sense of common identity.
I have not traditionally been a pessimist, but I am coming to believe
that our...
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Forum: Amateur Astronomy
January 22nd 19, 01:55 AM Posted to sci.astro.amateur
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Replies: 52
Views: 2,650
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Forum: Amateur Astronomy
January 10th 19, 11:35 PM Posted to sci.astro.amateur
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Replies: 6
Views: 1,358
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Forum: Amateur Astronomy
December 27th 18, 01:11 AM Posted to sci.astro.amateur
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Replies: 73
Views: 3,721
Let's Photograph Comet 46P Wirtanen
Paul Schlyter:
No he wouldn't. My local eye doctor wouldn't even say 20/30, she
would say 0.67 perhaps rounding it to 0.7 - as would most European
eye doctors. The 20/xx stuff is an American...
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Forum: Amateur Astronomy
December 26th 18, 04:05 PM Posted to sci.astro.amateur
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Replies: 73
Views: 3,721
Let's Photograph Comet 46P Wirtanen
Paul Schlyter:
But if the distance is irrelevant, why not perform the division
and say 0.67 instead of 20/30? Or at least 2/3 instead of 20/30?
After all it means that the person...
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Forum: Amateur Astronomy
December 24th 18, 02:26 PM Posted to sci.astro.amateur
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Replies: 73
Views: 3,721
Let's Photograph Comet 46P Wirtanen
Paul Schlyter:
If the numerator is always 20, what does this 20 mean? Is 20/20 in
some way different from, say, 25/25 or.30/30?
20/20, or metric 6/6 = 1. It's explained...
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Forum: Amateur Astronomy
December 24th 18, 02:45 AM Posted to sci.astro.amateur
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Replies: 47
Views: 3,393
earth tilt to 45 deg?
Thomas 'PointedEars' Lahn:
No. It is incorrect, although arguably poetic, to describe motion in
vacuum
as “floating”. Floating requires a substance to float on (e.g. water)
...
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Forum: Amateur Astronomy
December 23rd 18, 01:09 AM Posted to sci.astro.amateur
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Replies: 73
Views: 3,721
Let's Photograph Comet 46P Wirtanen
hleopold:
...Always a joy to see your photos, David, I look forward to more in the future.
I mostly read here, hardly ever comment. Not to mention I am jealous of your
set-up, though not of...
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Forum: Amateur Astronomy
December 22nd 18, 08:15 PM Posted to sci.astro.amateur
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Replies: 47
Views: 3,393
earth tilt to 45 deg?
Thomas 'PointedEars' Lahn:
No. It is incorrect, although arguably poetic, to describe motion in vacuum
as “floating”. Floating requires a substance to float on (e.g. water) or
in (e.g....
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Forum: Amateur Astronomy
December 19th 18, 11:22 PM Posted to sci.astro.amateur
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Replies: 73
Views: 3,721
Let's Photograph Comet 46P Wirtanen
hleopold:
That is very nice. Is it that green in reality, or as close to reality as we
normally get?
Chris L Peterson:
Well, "reality" is that this isn't bright enough to stimulate color
...
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Forum: Amateur Astronomy
December 19th 18, 11:19 PM Posted to sci.astro.amateur
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Replies: 73
Views: 3,721
Let's Photograph Comet 46P Wirtanen
Davoud on 18 December:
Tonight's result with details is at
https://www.flickr.com/photos/primeval/32503667868.
hleopold:
That is very nice. Is it that green in reality, or as close to...
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Forum: Amateur Astronomy
December 19th 18, 11:10 PM Posted to sci.astro.amateur
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Replies: 73
Views: 3,721
Let's Photograph Comet 46P Wirtanen
Davoud:
Tonight's result with details is at
https://www.flickr.com/photos/primeval/32503667868.
palsing:
Well, I'm impressed!
\Paul A
Your kind words about my shabby little...
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Forum: Amateur Astronomy
December 19th 18, 03:43 AM Posted to sci.astro.amateur
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Replies: 73
Views: 3,721
Let's Photograph Comet 46P Wirtanen
Chris L Peterson:
http://cloudbait.com/gallery/comet/20181217_46P_800.jpg
Shot early this morning after the Moon went down, 2-minute exposure
with a Canon 7D on a 4" refractor...
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Forum: Amateur Astronomy
December 18th 18, 10:15 PM Posted to sci.astro.amateur
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Replies: 73
Views: 3,721
Let's Photograph Comet 46P Wirtanen
Chris L Peterson:
http://cloudbait.com/gallery/comet/20181217_46P_800.jpg
Shot early this morning after the Moon went down, 2-minute exposure
with a Canon 7D on a 4" refractor (Stellarvue...
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Forum: Amateur Astronomy
December 17th 18, 07:09 PM Posted to sci.astro.amateur
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Replies: 73
Views: 3,721
Let's Photograph Comet 46P Wirtanen
46P/Wirtanen: https://www.flickr.com/photos/primeval/31330206277
--
I agree with almost everything that you have said and almost everything that
you will say in your entire life.
usenet *at*...
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Forum: Amateur Astronomy
December 12th 18, 11:42 PM Posted to sci.astro.amateur
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Replies: 59
Views: 2,890
46P, can't see
Martin Brown:
BTW the comet is now quite bright and an easy binocular object about
half the size of the moon in a dark sky. It should get brighter with
each passing day and will be pretty...
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Forum: Amateur Astronomy
December 12th 18, 10:07 PM Posted to sci.astro.amateur
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Replies: 59
Views: 2,890
46P, can't see
Paul Schlyter:
That's one good reason to avoid buying American cars... but yes, I do
have two sets of drill bits, one metric and one in inches.
?? American-built cars have used metric measure...
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Forum: Amateur Astronomy
December 12th 18, 10:02 PM Posted to sci.astro.amateur
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Replies: 59
Views: 2,890
46P, can't see
Paul Schlyter:
I see. You are stuck with that outdated inefficient system of units
of feet and inches. While the rest of the world has gone metric, the
USA, Burma and Liberia prefer to stick...
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Forum: Amateur Astronomy
December 9th 18, 06:06 PM Posted to sci.astro.amateur
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Replies: 90
Views: 2,853
Lat/Long and timekeeping system for Mars
Quadibloc:
It's true that a travelling geographer will indeed just get flown to, oh,
say,
Lima. But if his real destination is Machu Picchu, he will still have to
travel
by means...
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Forum: Amateur Astronomy
December 8th 18, 11:48 PM Posted to sci.astro.amateur
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Replies: 90
Views: 2,853
Lat/Long and timekeeping system for Mars
Paul Schlyter:
It's an interesting fact that modern professional astronomers rarely
know the constellations. They don't need to since they just dial in
the coordinates of the object they want...
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Forum: Amateur Astronomy
December 7th 18, 04:47 PM Posted to sci.astro.amateur
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Replies: 90
Views: 2,853
Lat/Long and timekeeping system for Mars
Paul Schlyter:
You can use the sky itself as a sidereal clock by finding out on
which RA your local meridian is.
When I was teaching myself to program in BASIC in the early 80's the
first...
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Forum: Amateur Astronomy
December 7th 18, 04:15 PM Posted to sci.astro.amateur
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Replies: 90
Views: 2,853
Lat/Long and timekeeping system for Mars
Davoud:
*Figuratively speaking. Due to macular degeneration I do not look
through telescopes any more.
Paul Schlyter:
Don't you look at the sky with your naked eyes either anymore?
I do,...
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Forum: Amateur Astronomy
December 5th 18, 06:00 PM Posted to sci.astro.amateur
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Replies: 90
Views: 2,853
Lat/Long and timekeeping system for Mars
Davoud:
I must confess that I have never heard of a "sidereal hour;"
Paul Schlyter:
Then you haven't computed the local altitude or azimuth for a
celestial object either, or it's rise and...
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