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Astro Tutorial #1.4 (old version): Coordinate Systems of the night sky - ALT/AZ vs RA/DEC
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- čas přidán 15. 08. 2024
- New version: • Astro Tutorial #1.4: C...
Welcome to the forth video of the tutorial session!
Today we discuss following items:
a) the nomenclature of important points and plains
b) coordinate systems of the night sky
c) finding stars with their coordinates in both systems
We use “Stellarium” to explore different aspects of the grids that help us to orientate in the night sky.
Download Stellarium here:
stellarium.org/
I hope you find this video helpful.
If you do: Hit like and subscribe!
Next video will be about
+ focal length
+ aperture
+ f-ratio and the
+ FOV
Subscribe to stay tuned!
Clear skies everyone and till next time here at catchingphotons!
Chris
Hashtags:
#ALZ/AZ
#RA/DEC
I just uploaded a remastered version of my first videos with enhanced audio quality and no coffee :-) Check them out: czcams.com/video/eQXigVT52Pw/video.html ! Clear skies!
Brilliant vids, glad you realise the coffee does put some of us fussy people off, I will go and watch them all now. thanks for posting.
Very well explained! The visualization with the lines really helped, and the emphasis on "summer/winter/9am/10pm" haha. And now I can't see the night sky without imaging the lines across the spherical night sky!
Thank you very much for this. This guy really teaches from scratch. This is the best explanation I was able to found on CZcams...
Thank you very much, you are very welcome!!
Your explanation was well illustrated and well explained. Other explanations weren't doing the trick. Thank you for being an excellent teacher.
Oh thank you very much! Very much appreciated! ☺️
another great, clear, unambiguous description of this important astronomy & astrophotography concept...
greatly appreciate your content - definitely making my journey in this new hobby much more enjoyable...
clear skies...
Thanks Jim! Greetings and clear skies! Chris
This is by far the best explanation and illustration of these principles on CZcams. Crystal clear to me now even though I've been polar aligning and using goto tech for a while I finally get the way eq works.
Thanks a lot Brandon!! I very much appreciate your words ;-) clear skies!!
You made my day! I got crystals clear idea 💡 how to pinpoint a heavenly object by this. RA and dec are challenging concepts for the beginners of astrophotography and nicely explained. I have subscribed to the channel. Keep the quality work coming. Thanks a ton !!
Thank you so much for this heartwarming comment!
I've watched a lot of videos explaining this concept before yours... my search stopped here :) best one, clear and to the point. Thanks!
Thanks a lot for this comment! Much appreciated! Clear skies to you! -Chris
I've spent the night watching these and making notes in a pad. Something I've not done in 12 years. Thank you so much for making these. I'm about to make my first serious telescope purchase and this is giving me so much clarity on what I'm really stepping into. THANK YOU!
Great! I am really happy that some of my intends work out as intended! Glad the video was of any help! Any idea of what the first scope will be? Clear skies Dan!
@@catchingphotons Almost. I think I need to decide on what my targets will be. I'm not fussed on photography just yet. My main thought has always been observing objects within the solar system.
My bracket for product research is a Newtonian reflector. Your video on 'chromatic aberration' made me careful of refractors in my £200-£300 budget range (?)
Your video on the sky grid makes me realise I don't want a computerised mount and miss out on learning more about applying RA/DEC.
If I wanted to view clear images within the solar system, but perhaps look at deep space objects I was thinking a Reflector with an f/ratio between 5 and 9, am i in the right area?
any advice would be amazing!
@@danthornton1673 I would get f ratio at 5 so you can see wider field deep sky objects and then just use a 3X Barlow to make it f15 for looking at planets. Maksutov cassegrain telescopes like the etx 90 and etx 125 are very well suited for planetary, I have them both. used telescope gear is very hard to find right now because of the pandemic
Haven't fully understand yet but great tutorial thanks
Than it wasn't too great of a tutorial :-D Any questions left I can resolve?
6:30... LOLOL! Great example, and AWESOME explanation!!
;) Thanks!
Very good explanation!
Thank you. Glad the video was of any help!
Clear and vivid explanation. Simplicity of words spoken. Quite understandable. I like you dude for the way you present stuff. All good except for the voice. Please make sure that your voice, while recording, is clear enough. Love from Pakistan.👌
Thank you dude for the encouraging comment! I will try to improve quality along the way. Thanks for the feedback.
Greetings and clear skies!
Chris
COFFEE?!
I LUV coffee!, absolutely NOTHING wrong w/ coffee!
Seriously I'm fine w/ the old & see no reason to change.
But what I would REALLY like to see is a video about estimating RA.
I don't want to have to have or use a book, go-to, computer, phone, etc.
I just want to know how to estimate the approximate location from EQ.
Thank you, Chris!
Another excellent video so I subscribed.
Have a GREAT day, Neighbor!
Hey Jon!
Thanks for your encouraging words!
I need some clarification regarding your question: what do you mean with estimating RA? Are you referring to the"location RA/DEC rings on the common EQ mount?
Thanks and clear skies!!
Excellent! Thanks,
You are very welcome dmccallie! Thank you for your comment! Clear skies!
Hello Chris. I love your videos and I have a question. When we are outside and there is nothing but the ra/dec information about the star, how can we know where it exactly is? In alt/az we know that the North is zero and we have this reference but in ra/dec I did not understand what is our reference. I hope I made myself clear. Thank you for your videos. Greetings from Turkey.
Good video. It could have used a little more emphasis at the end about RA and DEC. FYI the coffee sipping was kinda gross when you can't see the person.
Thanks for the feedback, always appreciated!
One problem I don't understand is I've seen RA described hours to the left and another to the right. Which is it? In the last example herein, it measured to the left (CW rotation viewed from above) 5hrs 16'. In a different video, it would be to the right (CCW rotation viewed from above) 18hrs 44'. Can someone shed some light on this for me?
Wow a lot of mathematics here. Hidden Numbers ring a bell here.
Everything is always about math ;)
A lot of mathematics, Hidden Figures ring a bell?
Hidden figures was a great movie!! I loved it!
Though the ladies from NASA did quite a more complicated job than "just" adding coordinates to stars ;)
Greetings Chris
is that a running gag drinking coffee during yr videos???
Somehow now it is. Mind though that there are "coffee-free" re-uploads available within the "Theory"-playlist, mainly because the "coffee-topic" was much more controversial than I anticipated ;-) I want the audience to focus on the content - so if you mind the coffee, feel free to switch versions any time!
Clear skies!
@@catchingphotons well, somehow I do mind yes... on the other hand, i should not be irked too much about it. It's just funny to see how some sounds can be very frustrating and some sounds please the ear (like turning a cap off a william optics bathinov mask) bist du deutsch?
Одним словом это как мух летающих считать
ahm.... ?
The earth is flat and STATIONARY!!
:-) I always don't know if these comments are legit, bots, trolls or ironic.
@@catchingphotons Do you know why all commercial flights employ the coordinate system North east down!? North east down neglects the alleged curvature of the earth!! I wonder why.....