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Calculate azimuth from declination

In a paper from 1912, an observer wrote about one of the stone rows from the stone circle of Calanais (58 02 N, 06 45 W): "The azimuth of this alignment, combined with the altitude of the horizon seen along it, produce a declination of 6 43' N.
How did he calculate this and how would I calculate what the azimuth was with an altitude of 1 degree?
Read more : Calculate azimuth from declination | Views : 2057 | Replies : 3


planets on allwise images

hi ya am a budding amateur astronomer have been spending allot of time on sky watch alpha viewing their phenominal images.
my question is are you able to see our solar planets on these images or does the view differ wether being on the ground or being on hubble. i have been searching for jupiter have been following star charts for this time of year but cant seem to pin it down.
is there something ...
Read more : planets on allwise images | Views : 1706 | Replies : 2


Why not use a polar mount?

If you have no Goto help then is there any advantage in not having a polar mount?
Is it a matter of cost and simplicity?
I am considering buying an astronomical telescope (at long last) because we now live out in the country and our Essex skies are often clear and there is so little local light pollution.
Read more : Why not use a polar mount? | Views : 2115 | Replies : 4


Vivitar 60x/120x lenses

I have a 5mm lens and a 10mm lens. My last telescope had 3 lenses . which one am I missing?
Read more : Vivitar 60x/120x lenses | Views : 1631 | Replies : 1


Advice on observing the sun using reflector & filter(s)

I've what might well be a bit of a daft question re observing the sun.

I've a Skywatcher 200 reflector & have successfully observed the sun using a Baader Astrosolar filter over the end (I know not to do it any other way & to check for pinholes etc).

My query is whether (& what type) of H-alpha filter could be used to complement this and let me see the sun in a different light ...
Read more : Advice on observing the sun using reflector & filter(s) | Views : 1883 | Replies : 3


What was the first proper telescope you looked through

Hi all,

Last night as my friend, Rob, was leaving I noticed that it was a lovely night and he had never seen Jupiter through a telescope. So, I set up my 120mm Refractor and he had the 'WOW' moment...

My first look through a 'proper' astronomical telescope was at the Lytham St.Annes Astro Soc in 1977. We met monthly at the St. Annes College of FE. - One night we decided to observe through ...
Read more : What was the first proper telescope you looked through | Views : 2413 | Replies : 6


Off to the stars........

Hawking and others - micro space craft.
Question: Newton's law of action / reaction. If we use the enormous energy source of numerous power stations to propel the craft, surely the 'reaction' will be to shift the earth in orbit or rotation?
With apology from a 'beginner' remembering ( incorrectly ? ) a bit of science from school..
Read more : Off to the stars........ | Views : 2480 | Replies : 9


what lense to use

Hi all

I am still new to astronomy and wondered what lense sizes you would use to look at the moon, planets etc. I have tried messing around but some lenses appear never to go into focus as if they are too powerful. I also use a 3x and 2x barlow.

Any help gratefully received.

Regards tony
Read more : what lense to use | Views : 4723 | Replies : 18


Upside down?

Hi all

Only my second post and second month of being a telescope owner.

I haveJust managed collimation on my skywatcher 130 Newtonian telescope and feel it went well , just a quick and I imagine to the experienced astronomer a proper derrrr question.

When I was sorting my red dot finder I picked out a chimney about 300 metres away and the view it gave me was upside down . Is this correct?

After ...
Read more : Upside down? | Views : 2600 | Replies : 3


SKYWATCHER 130 COLLIMATION

Hi all

I owned my last telescope as a child some 40 yrs ago and was keen to get back into the hobby.

New to the forum having owned a telescope for a couple of cloudy months.

I have just purchased a laser collimator. Watching the videos on line the primary mirrors appear to have a centre circle donut to align the laser. My 130 does not appear to have this donut.

Is this normal ...
Read more : SKYWATCHER 130 COLLIMATION | Views : 1393 | Replies : 1


 

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