Astro Tutorial #1.12: What is "seeing"?
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- Опубликовано: 5 сен 2024
- Hey folks,
today's video will be all about the technical term seeing:
What factors influence our observation session?
How do different seeing conditions look like?
We will discuss this topics by having a look at three images I took from Venus.
One with bad seeing - one with intermediate seeing and one with quite good seeing.
Join me on this trip to the planets!
Clear skies everyone!
Chris
Hashtags:
#seeing
#astro
#telescope
I’m a rookie in this space. Your videos has been THE content I was looking for and I must admit, it’s very rich and enlightening. I’ve become your fan Chris 😇
Thank you very much Sean for your encouraging comment! Clear skies to you!
Me2
Been binge watching your tutorials. Really appreciate these. Thank you.
Thanks Gene, glad the videos were of any help! Clear skies to you!
Your channel is very interesting. In the last week or so I bought a pair of 20x80 binoculars, and (in England) tried them on orion nebula, light gathering was great, saw the nebula and stars within, but I couldnt get a perfect focus on it, or any stars or Jupiter, and began suspecting the optics were faulty. I tried considering cooldown time, dew, my eyes, and light pollution. No real change over a ccouple nights, but tI had been looking in large gaps between clouds. Suddenly got perfect focus, easily, 3 or 4 nights later, when there was no cloud at all. I believe the sudden improvement was partly cooldown time for the binos, but largely due to better seeing, which I had under appreciated. Ive added dew shields, a bino bandit, keep the binos in the garage instead of indoors, and will add dew heaters if the need arises. I have a good tripod, but am working on making a parallelogram mount so I can observe seated, version one needs improvements, so work continues. Subscribed;)
Cool story, thanks for sharing!! Cheers!
I was tormented with bad images of planets for a long time until one day I was able to get details in Mars. It was then that I realised all my failed attempts were due to bad seeing, particularly high humidity of 95% and fast moving air currents. Thanks for the video.
Awesome Chris!
Thanks Ray!
I assume the higher the angle up plays a part in the image, less atmosphere to contend with? Thanks again Chris. 🪐☕️
Yea you are right, I should have mentioned it in the video!
This is why one should image planets standing high.
This is also true for DSOs but for another reason:
x Whereas planets start to wobble due to seeing (air movement, not so much the air itself) and so don’t get sharp images -
x imaging DSOs is all about SNR (signal to noise). And more air (not so much the movement) means more light from the object will never reach you while noise stays the same. So SNR goes down and that’s bad for the image.
All in all: Air is bad ;-)
Greetings
Chris
Great informative Video
Also @4:16 it looks a Bit like a Sad Face Venus :-)!!!
Haha :-)
Hey Chris, I was wondering if you are considering making a discord server. I have lots of questions and i think that a community of passionate people is the best place to ask for answers!
Great job, keep it up!!
Thank you George for your comment! I have not jet considered that. It’s a great idea and maybe some time from now I will consider it. For now I am very busy building up this channel ;-) I’m looking forward to walking this road together with all the nice folks already around here!
Greetings
Chris
Thank you.
You are very welcome!
This is interesting🙃
Thanks 😊
Thank you
You are very welcome!!
👍
:-)
Aren’t you mixing transparency and seeing? Seeing is often good with high humidity, while transparency low.
One more thing, what is point of this video. You need to tell how numerically seeing is presented, how it is measured, etc.
These are valid arguments. But this video is intended to give a first impression on what factors can influence your results. Thanks anyway!
@@catchingphotons It is impossible to use any tutorial without practical instructions relying on numerical data, especially if you want to teach people about resolution in astrophotography.