Thread: Jupiter
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Old October 25th 09, 05:28 PM posted to rec.photo.digital,aus.photo
k
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Posts: 69
Default Jupiter

where is Florida?

sounds like it must be an SA town..

k


"Look! Another Troll!" wrote in message
...
| On Sat, 24 Oct 2009 23:56:56 +1000, Noons wrote:
|
| Outing Trolls wrote,on my timestamp of 24/10/2009 9:24 PM:
| On Sat, 24 Oct 2009 22:17:05 +1000, Noons
wrote:
|
| Goos stuff as usual, Piggo. Pity you can't move all that gear 300
miles inland,
| eh?
|
| Inland is worse, but then you'd know this if you knew the least bit
about
| photography and astronomy. Another **** poor attempt of yours to try to
| look like you knew something. Trolls never do.
|
|
| What an idiot...
|
| Inland *is* worse, because inland air is more unstable, has higher
| fluctuations in humidity levels, often contains more dust and particulate
| pollutants, and is downright turbulent compared to areas near ocean air.
| All are enemies of "seeing" conditions. The weakest link when you have a
| decent telescope optics.
|
| Some of the most stable pristine skies can be found in less-inhabited
| regions of places like Florida, where any part of the land is only a
couple
| hundred miles from either coastline. The skies deep in the Everglades for
| example, easily rival the night-skies you will see in some remote national
| forest at the very top of the Rocky Mountains. (Viewed and photographed
the
| night-skies at both, so I have first-hand experience with these locations
| for night-sky seeing conditions.) Ocean water has generally laminar
| air-flows, most of the pollutants have dropped out of the sky--any coming
| from other land-masses when airflow direction is inland. The fluctuations
| in humidity levels (a killer of air quality and seeing for astronomy), are
| usually much more gradual when dealing with ocean air as opposed to inland
| continental air.
|
| This is why the most favored large telescope installations are built
| furthest from large land masses, as high as possible (when possible), and
| surrounded by or very near the largest bodies of ocean water with
| prevailing inland air-flows. This is precisely why they choose the
Hawaiian
| Islands for some of the larger and more advanced observatories not too
long
| ago. The upcoming mega-telescopes now in construction are being built near
| the ocean in places like the coastal deserts in Chile near the Pacific
| shore.
|
| http://en.wikipedia.org/wiki/Very_Large_Telescope
|
| Since he is doing planetary imaging, light-pollution is not much of a
| concern, unless he gets into the outer planets (which won't show much in a
| telescope of that size anyway). Or if he'd be trying to do long exposures
| in place like downtown Times-Square New-York City.
|
| Had you said, "Pity you can't move all that gear to a coastal region
| further from light pollution." Then you might have been perceived as
having
| an iota of credible experience with either subject, photography or
| astronomy. Since you gave him the worst advice possible concerning this
| field of interest, there's only one conclusion possible.
|
| Did you learn anything today? You useless **** of an ignorant troll.
|