SingAstro

friend very interested, will give good price.

Hi there, thnx for the answers... May i know what is EP? also, quote from Kamikaze: with regard to the f/ratio and not astrophotography what we know: focal ratio determines field of view... and: actual FOV is approx= apparent FOV(of ep) divided by mag then with any ep, any mag and FOV can be achieve...

If given between two telescopes of the same apeture, does focal length of primary matter? Since both scopes have the same useful magnification, a wide field telescope should give the same image as another telescope with a longer focal length at the same magnification right? Or will higher magnificat...

response can be trained by playing snap:) as for astro competitions, who reads and practices questions the most and can handle the pressure the most wins. simple. there's no secret formula, that's what im trying to say.

hi.several things i would like to comment on: 1. im from chs. our school has a 4.5" newt. I said i would like a spotting scope, so obviously i want an erect prism on a SCT or MCT. Obviously newtonian is awkward for terrestial viewing. 2.true, ya just need to be good at mugging to win astro. we ...

yes. thats what im talking about. also, im reading "astronomy-jouney to the cosmos" by john.d.fix.

Ok, i found out: no matter where you are on earth, magnetic north is still 11 degrees away from true north. I read this in an astronomy textbook. If you are standing on the poles, magnetic north is 11/360 X pi X 2 X (6378)= 1224.5 km away. which means that astronomers cant really use a compass to ga...

magnetic north is 11 degrees away from true north. Hi Wondering where you obtained this info from? Magnetic deviatoin varies by locality; in Singapore, it should be less than 1 deg. cheers cc Actually, magnetic deviation varies about 11 degrees at the poles. This im very sure about. I'm not sure ab...

magnetic north is 11 degrees away from true north. The closest way to find true north for astronomers, is to find polaris, which is 40+ arc seconds away from true north. Due to precession, polaris will approach true north at its closest at around 20+arc seconds.

http://www.amazon.com/gp/reader/0691089132/ref=sib_dp_pt/103-2530164-1627057#reader-link Stars and planets by ian ridpath and wil trion----the book owns. its much more concise than DK's version and provides a lot of valuable information. It's also much more worth it than DK's version at the same pri...