Tillibobs August Solar thread

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Re: Tillibobs August Solar thread

#41

Post by FRAZ »


Do you guys know about the Lagrangian points?

https://astronomy.com/magazine/ask-astr ... ey81jeXgqA
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Re: Tillibobs August Solar thread

#42

Post by Gordon »


That’s interesting! It makes sense.
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Re: Tillibobs August Solar thread

#43

Post by Graeme1858 »


The JWST will be parked at L2. Or to be more specific, will orbit L2.

Fascinating to think of something orbiting an area of empty space in gravitational equilibrium!

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Re: Tillibobs August Solar thread

#44

Post by notFritzArgelander »


Graeme1858 wrote: Fri Aug 06, 2021 9:54 pm The JWST will be parked at L2. Or to be more specific, will orbit L2.

Fascinating to think of something orbiting an area of empty space in gravitational equilibrium!

Regards

Graeme
The values of the gravitational potential energy in a 3d space with two massive bodies make complex dances possible. The orbital technology is quite old, having been written up in 1772.

https://en.wikipedia.org/wiki/Joseph-Lo ... #Astronomy

Full bio of Lagrange is here.

https://en.wikipedia.org/wiki/Joseph-Louis_Lagrange

The holy trinity of classical dynamics of gravitating bodies is Newton, Lagrange and Hamilton. ;)
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Re: Tillibobs August Solar thread

#45

Post by FRAZ »


I have heard of Newton (of course) and Lagrange due to these points but Hamilton is less known.

It was interesting checking out the difference in their thinking. Hamilton's wikipage is full of equations so I cut a little paragraph for anyone interested.



Hamilton's equations consist of 2n first-order differential equations, while Lagrange's equations consist of n second-order equations. Hamilton's equations usually do not reduce the difficulty of finding explicit solutions, but they still offer some advantages: Important theoretical results can be derived, because coordinates and momenta are independent variables with nearly symmetric roles.

Hamilton's equations have another advantage over Lagrange's equations: if a system has a symmetry, such that a coordinate does not occur in the Hamiltonian, the corresponding momentum is conserved, and that coordinate can be ignored in the other equations of the set. This effectively reduces the problem from n coordinates to (n − 1) coordinates. In the Lagrangian framework, the result that the corresponding momentum is conserved still follows immediately, but all the generalized velocities still occur in the Lagrangian. A system of equations in n coordinates still has to be solved.[3] The Lagrangian and Hamiltonian approaches provide the groundwork for deeper results in the theory of classical mechanics, and for formulations of quantum mechanics.
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Re: Tillibobs August Solar thread

#46

Post by FRAZ »


I found this small piece in the britannica.com website that helped me to define the development Hamilton made to the Lagrangian principles.

https://www.britannica.com/science/mech ... -equations
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Re: Tillibobs August Solar thread

#47

Post by notFritzArgelander »


Hamilton also invented quaternions, BTW and Hamiltonian classical mechanics is the path that leads to quantum mechanics as well.
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Re: Tillibobs August Solar thread

#48

Post by Lowjiber »


It remains very hot here, but the sky is covered with smoke from the fires in California... Very similar to last year.
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Re: Tillibobs August Solar thread

#49

Post by Ben Cartwright SASS »


the clear sky charts show all blue, Astro Panel (Danko) and Astropherics, but at 9:15 just when the sun cleared my trees total cloud cover not even any shadows. At least "Clear Outside" shows RED for the sky due to the heavy haze from the fire out west.
I keep leaning back in my den chair as I am typing and looking out my window to see if there is any blue. There seemed to be blue heading this way but as it got closer it was a very milky blue with bands of clouds in it. If there was a spectacular prom or AR I would go out and try it but with 90 degrees and 90% humidity it is tough out there and there is just one small prom (SE) and one average AR.
I want to play with my tuning knob on the Quark turning it down to 9 o'clock and then at 3 o'clock to compare the results but I think the heavy haze will affect the results. I think I will work on the paperwork for my Astro League Open Cluster award.

in the picture South is to the left
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Re: Tillibobs August Solar thread

#50

Post by Ben Cartwright SASS »


Lowjiber wrote: Sat Aug 07, 2021 10:54 pm It remains very hot here, but the sky is covered with smoke from the fires in California... Very similar to last year.
at least you don't have the humidity, we are 95 with 90-100% humidity!!!
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Re: Tillibobs August Solar thread

#51

Post by Ben Cartwright SASS »


now 10 minutes later it is worse if anything
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Re: Tillibobs August Solar thread

#52

Post by FRAZ »


I got a very small window and caught a single shot of AR2853
SunAR2853.jpg
SunAR2853mono.jpg
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Re: Tillibobs August Solar thread

#53

Post by FRAZ »


Does anyone know how they designate new active regions and who is responsible for doing so?
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Re: Tillibobs August Solar thread

#54

Post by FRAZ »


I have to admit that i am really bad for checking this out and use solarmonitor when I can.
I tend to have very little time to actually capture the sun and then it has to play ball.
Mentored by Keith, Mike, John and Bill. (The old guard) and forever grateful.
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Re: Tillibobs August Solar thread

#55

Post by Thefatkitty »


FRAZ wrote: Sat Aug 14, 2021 5:19 am Does anyone know how they designate new active regions and who is responsible for doing so?
Hey Fraz, I remember coming across this; I was wondering the same thing a few years ago: AR Numbers

Go figure, it's clear here with no humidity for the first time in weeks, and not a single spot on the Sun. It's tough being a white-light Solarhead.... :doh:

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Re: Tillibobs August Solar thread

#56

Post by Lowjiber »


Nice work on AR2853, FRAZ. The details really stand out on the monochrome shot and aren't lost when the color was added. Thanks for the share!

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Re: Tillibobs August Solar thread

#57

Post by helicon »


Great new image FRAZ!
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Re: Tillibobs August Solar thread

#58

Post by FRAZ »


Man, I am so addicted to the Astrophysics discussion area!

viewforum.php?f=74

Take a look it is utterly fascinating to see what the brainiacs are looking at. (well NfA)
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Re: Tillibobs August Solar thread

#59

Post by Ben Cartwright SASS »


I just tried straight through imaging, taking out the diagonal, I had to add two of the extension tubes to my Blue Fire 2" holder to bring it to focus on the sun.

The problem is when I tried to put the 1.25 UV/IR cut filter on the Quark it won't thread, so I am going to have to buy a 2" UV/IR. Ouch

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I might not always be right but I am never wrong, once I thought I was wrong, but I was mistaken...

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Re: Tillibobs August Solar thread

#60

Post by FRAZ »


Looks pretty stable too, you are lucky if you get no flex.
Mentored by Keith, Mike, John and Bill. (The old guard) and forever grateful.
PST mod stage 2 - Quark on extended loan and yet to repay with value ;)
Camera- ASi 174 mono no tilt required.
BF10,15,30 straight through with baader ffc. (looking to replace the rusted IFT on 10 + 15 with a maier replacement)
Lots of nighttime scopes and stuff but focus on the sun.
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