ICEINSPACE
|
Moon Phase
CURRENT MOON
Waning Crescent 11.2%
|
|
04-04-2016, 12:16 PM
|
 |
kids+wife+scopes=happyman
|
|
Join Date: Jun 2008
Location: sydney, australia
Posts: 5,005
|
|
|
Geometry question
Hi all,
I saw something intriguing on the Sun on Saturday, and I'm at a loss on how to describe what I saw. There was a series of filament arcs that were in a line all along side each other, somewhat resembling shark gills. I saw four of these filaments - something I had never seen before.
My question then is, what is the description for a series of 'parallel arcs'? This is the best way I have to describe it.
They are not co-centric as they are all of the same radius. They are 'parallel' as best as I can say.
Anyone can offer a description?
Mental.
|
04-04-2016, 12:39 PM
|
 |
DeepSkySlacker
|
|
Join Date: Nov 2008
Location: hobart, tasmania
Posts: 2,241
|
|
|
geometry
arcades?
|
04-04-2016, 12:57 PM
|
|
kids+wife+scopes=happyman
|
|
Join Date: Jun 2008
Location: sydney, australia
Posts: 5,005
|
|
Quote:
Originally Posted by graham.hobart
arcades?
|
Clever, really clever, 
Smart arse...  but clever.
|
04-04-2016, 01:03 PM
|
|
Registered User
|
|
Join Date: Jul 2006
Location: Lithgow, NSW
Posts: 1,685
|
|
|
Someone has to be serious so I would say they are offset arcs. For them to be parallel or concentric arcs they would have to have the same centre radii.
|
04-04-2016, 01:13 PM
|
|
DeepSkySlacker
|
|
Join Date: Nov 2008
Location: hobart, tasmania
Posts: 2,241
|
|
|
geometry
was being serious - there are a series of arcs in certain blood vessel networks which are not parallel but are called arcades -denoting a system of similar arcs only. See arterial arcades and the vasa recta in the small intestine.
|
04-04-2016, 01:14 PM
|
|
...
|
|
Join Date: Sep 2012
Posts: 3,588
|
|
Murder of Crows ...
Parliament of Owls ...
Herd of Cows ...
.....
Offset of Arcs ............... that makes sense........ 
|
04-04-2016, 01:23 PM
|
 |
Registered User
|
|
Join Date: Feb 2009
Location: Blue Mountains, Australia
Posts: 1,338
|
|
|
To translate an object, you slide it to a new position without any rotation or change in size. If they were all the same length and radius they would be translated arcs.
Maybe, a series of translated arcs in the same direction.
Regards, Rob
|
04-04-2016, 01:26 PM
|
|
Registered User
|
|
Join Date: Sep 2011
Location: margaret river, western australia
Posts: 6,070
|
|
|
Offset arc echos, or maybe offset repeatarcs.
raymo
Last edited by raymo; 04-04-2016 at 01:28 PM.
Reason: more text
|
04-04-2016, 01:28 PM
|
|
DeepSkySlacker
|
|
Join Date: Nov 2008
Location: hobart, tasmania
Posts: 2,241
|
|
|
arcs
archaeoptics? 
|
04-04-2016, 01:34 PM
|
|
kids+wife+scopes=happyman
|
|
Join Date: Jun 2008
Location: sydney, australia
Posts: 5,005
|
|
Quote:
Originally Posted by graham.hobart
was being serious - there are a series of arcs in certain blood vessel networks which are not parallel but are called arcades -denoting a system of similar arcs only. See arterial arcades and the vasa recta in the small intestine.
|
|
04-04-2016, 01:35 PM
|
|
kids+wife+scopes=happyman
|
|
Join Date: Jun 2008
Location: sydney, australia
Posts: 5,005
|
|
|
Not as easy a description as i thought!
|
04-04-2016, 01:59 PM
|
|
Registered User
|
|
Join Date: Sep 2007
Location: Australia
Posts: 896
|
|
|
I'll have a crack,
5 equidistant radially spaced congruent arcs of diminishing measure of arc from approx 160 to 90 degrees
But a picture tells a thousand words !
|
04-04-2016, 02:10 PM
|
 |
Registered User
|
|
Join Date: Mar 2008
Location: Wollongong
Posts: 3,819
|
|
Fireworks??? 
|
04-04-2016, 02:16 PM
|
|
Politically incorrect.
|
|
Join Date: Apr 2009
Location: Tasmania (South end)
Posts: 2,315
|
|
Quote:
Originally Posted by graham.hobart
archaeoptics? |
Bloody 'ell, I warned you about working such long hours... 
|
04-04-2016, 02:41 PM
|
 |
amateur
|
|
Join Date: Jul 2006
Location: Mt Waverley, VIC
Posts: 7,107
|
|
|
Linear array of arcs.
|
04-04-2016, 03:36 PM
|
|
Watch me post!
|
|
Join Date: Mar 2006
Location: Melbourne
Posts: 1,905
|
|
|
Nissen Hut frames??
Andrew
|
04-04-2016, 03:38 PM
|
 |
ze frogginator
|
|
Join Date: Oct 2007
Location: Sydney
Posts: 22,079
|
|
Homer's missing hair. 
|
04-04-2016, 03:40 PM
|
 |
Registered User
|
|
Join Date: Mar 2012
Location: Mornington Peninsula, Australia
Posts: 3,997
|
|
|
apparent linear array of arcs
|
04-04-2016, 04:27 PM
|
|
...
|
|
Join Date: Sep 2012
Posts: 3,588
|
|
|
lens aberrations
|
04-04-2016, 04:37 PM
|
|
Registered User
|
|
Join Date: Sep 2010
Location: Adelaide
Posts: 818
|
|
|
Bent.
Dean
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT +10. The time is now 06:10 AM.
|
|
