Solar continuum filter
Tue, 21 Apr 2009 18:55:59 +0100
Hi all,
I was wondering is anyone is using one of these filters to view the Sun (in
tandem with a white light filter).
e.g. http://www.firstlightoptics.com/proddetail.php?prod=bsolconti
Are they any good?
I've seen the Baader SCF available from many dealers and hopefully someone
can give an honest ...
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Sky@Night magazine CD
Mon, 20 Apr 2009 19:44:31 +0100
Hi Group, This is for UK readers I guess; the S@N CD contains release 5
of the free-ware stacking programme Registax. When you download this
there is a message telling you that it is a beta version valid for 30
days after which it stops working. OK, BUT it also says it was compiled
in February 2009 which I mak ...
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Barlow lenses
Fri, 17 Apr 2009 15:24:26 +0100
I'd appreciate a bit of advise on Barlows. I've got a WO Megrez 90 APO,
which can accept either a 2" or 1.25" Barlow; what would be best ? I only
have one eyepiece - a WO zoom. I am hoping that the Barlow will allow me to
see Jupiter and Saturn a little better (i.e. increase the image size). Any
recommend ...
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Re: A mysterious bright star will appear in the sky visible to all - within days
Thu, 16 Apr 2009 07:06:29 +0200
On Tue, 16 Dec 2008 10:24:44 -0800 (PST), RH <halcon7roho@yahoo.com> wrote:
>Dear Readers:
>
>It is logical for you not to expect anything to materialize that can't
>be easily ignored or explained away. You don't expect any major
>changes in the world, or for world peace to ever come because you've
>become co ...
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Re: Addressing the formation of the solar system
Wed, 15 Apr 2009 15:43:11 -0700 (PDT)
On Apr 6, 10:20?pm, BURT <macromi...@yahoo.com> wrote:
> How do accretion discs form in a flat plane around a star?
>
> How does the gravitational order bring matter together in the solar
> plane. How then does this matter proceed to become planets?
>
> There were trillions of lumps of matter. How did they come ...
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Fitting an SCT focuser onto a refractor?
Tue, 14 Apr 2009 13:15:49 -0700 (PDT)
Hi
Let's imagine you want to fit an SCT threaded focuser onto a
refractor...
The fine, female threaded Celestron/Meade SCT backplate aperture is
about ~77mm in diameter. So the matching SCT focuser has a male thread
diameter of ~78mm.
Does anyone in the UK/Europe sell a female threaded adapter ring which
...
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Large first quarter lunar mosaic
Tue, 14 Apr 2009 15:38:24 +0100
This is the last of the set of 4 mosaics I did on the nights of the
30th & 31st March, 1st and 2nd of April 2009. It was also the most
time consuming being made up of 166 seperate frames, each distilled
from an 800-frame AVI file. The seeing was nice and steady on this
night and the final resolution is pretty good ...
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Amateur images of Trans-Neptunian objects - Haumea
Mon, 13 Apr 2009 23:38:52 -0700 (PDT)
Amateur images of Trans-Neptunian objects - Haumea
http://www.martin-nicholson.info/haumea/haumea.htm
Haumea - 2003 EL61
Haumea is a dwarf planet and a plutoid orbiting the sun in the Kuiper
belt. Haumea has a typical orbit for a classical Kuiper belt object,
with an orbital period of 283 Earth years, a per ...
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Amateur image of Trans-Neptunian objects
Sun, 12 Apr 2009 22:56:26 -0700 (PDT)
Quaoar - 2002 LM60
Quaoar is a potential dwarf planet orbiting the sun in the Kuiper
belt. At the time of its discovery in 2002 it was the largest object
found in the solar system since Pluto. Subsequently even larger
objects were found - Eris, Sedna, Haumea, and Makemake.
http://www.martin-nicholson.info/qua ...
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Immatterial expansion
Fri, 10 Apr 2009 12:14:40 -0700 (PDT)
Space stretches everywhere. There is no prefered scale for a galaxy or
a quasar.
The quasar has two redshifts: gravity and distance.
Mitch Raemsch ...
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