SingAstro

Hi leslie

I can help out on 27 Feb 04. Pls see the pm i send you.

Hi Sam,

Can you provide some info on the type and properties of the plastic material used. Is is the same as those Meade eyepiece containers?

Also, are there eyepiece filter cases available for 1.25 " & 2"?

Thanks.

Hi everyone Those interested in the current Mars landings may want to take note: I saw in today's Straits Times that there is a Mars exhibition at Suntec City Mall - Tropics Atrium from 27th Jan to 1st Feb. Some multimedia visuals and a model of Spirit / Opportunity will be on display. Admission is ...

Yes, star maps to 4.5 mag is suitable for newbies who wants to learn how to identify the constellations and for finding naked eye objects. It may not be so useful or possible for finding deep sky objects using binoculars or small scopes.

Sharp optics you have, chaosknight; you are spot on. That was indeed some sloppy work I did. Next time I better open my eyes and think twice before I consider to post here.

Yes, it should have read as "...or the radius of the Earth' orbit."

The books recommended above are all very good. I would like to introduce two other books: There are many good fieldguides to take with you for stargazing and indeed several of these have the same title of 'Stars and Planets'. One of which I recommend warmly is "Collin's pocket guide to STARS &a...

Oops again!! I didn't realised the 'magnitude' of this problem when I submitted my very first post above in singastro!! I quickly went to check several sources in my library and I found out that you guys are right; it should be based on 1 AU or the Earth's radius. In fact, several books did not defi...

oops...I should have explained in my earlier post... One parsec is defined as the distance of a star (nearby) which has a PARallax (apparent shift in position against the background stars) of one arc SECond (hence PARSEC) when viewed from the Earth six months apart (ie, from the two extreme opposite...

When an amateur astronomer says 'magnitude', the person usually refers to 'apparent magnitude', which is a measure of the relative brightness of the stars or other celestial objects as seen from the earth. It is called 'apparrent' because, for example, star A may be actually (intrinsically) brighter...