If you look at star pictures, for example The Pleiades picture below:
Several Pleiades stars, click for much bigger version. Image from: hqwalls.blogspot.com
you notice that on most of them there are four beams coming out of every star. Also, most of artists draw stars with these beams too, but if you look at the sky yourself — no beams. Where do they come from? Let me give you a hint in the picture below:
Front of the newtonian optical tube. Image credit: www.rocketroberts.com
So, when you see the beams, you know that it is not a cool feature, it is a telescope who adds them. How do stars pictures look using a telescope without spider vanes?
NGC 7635 - Bubble Nebula in Cassiopeia. Click for slightly bigger version. Image credit: Luc Germain.
Tags: astronomy, Astrophotography, pictures of stars, Stargazing, stars, telescopes
July 12, 2009 at 2:39 pm |
I not only enjoy the beautiful pics.; but the info. is information that I’d like 2 square away.
Thanks!
July 12, 2009 at 2:45 pm |
Thank you Debbie!
I learnt a lot of small stuff over the years, and I really glad to hear that it helps someone to make things around us a bit more clear.