Sunshine

That’s an unbelievable difference, On the left side there is more light pollution than anything else, a glaring difference.

Smells like a fish market to me.

Thanks to all, before i order online i will call my local scope store to see if they carry it as he carries many Baader products, i could have easily called him first but i wanted to get opinions on the many different products which im sure you've all used before. It seems like wonder fluid is the one to get.

Great stuff, thanks for the reply, im sure the optical wonder is great but, i was always hesitant to rub optics with cloths, will this fluid leave any residue or film? wipe marks which will be an issue in any way?

Does anyone have any methods/tips for cleaning the objective on my frac, please. The last thing I want is to end up doing something I’ll regret.  By the looks of this image it seems as though it could use a cleaning. Having said that, the views are great, should I just leave it? I am accustomed to letting reflectors father dust and advising against cleaning small amounts of dust off mirrors. This being my first frac I’m not sure to what degree the image may be affected by dust on small aperture lenses.

Thanks to all.

Last night was a night of exceptional seeing conditions, it made for some amazing views at the eyepiece even using my 3.5mm eyepiece, Mars looked razor sharp. It’s surface features were very well defined at 230x in my 115mm frac, unfortunately, my imaging prowess isn’t as good at faithfully relaying what I could see. Mars begged to be imaged last night, in this rushed image did I manage to capture atmosphere? it would seem so as I can’t explain the bluish hues visible on its limbs.

9 hours ago, Ken82 said:

Ill need a coma corrector for my dob though. 

Judging by the size and weight of that hand grenade you'll need a counterweight too!

Welcome back!

Tell us about some other views through this amazing thing!

Recently Trevor from Astrobackyard has had the chance to work with a telescope manufacturer who asked him to design a great all around wide field imaging APO. The Raptor is the result of careful planning from Trevor, who as we know is a cracking imager, what do you imagers think? would you buy one?.

That is one fine bit of kit you have there!

3 hours ago, saac said:

Im pretty sure something along these lines was discussed a few months ago.  Here is my take on it . The model of the gravity well would still hold and account for the tidal friction experienced by Io.  Think of a cube of Io, 1km by 1km by 1km.   The end of the cube reaching down deeper into the gravity well will experience a greater acceleration due to the increased warping of space than the end further up , in the shallow end so to speak.  So this km long wedge of Io will experience a differential acceleration along its length  - this affects every single atom so oriented along the wedge.  As Io rotates  in orbit it will experience the changing profile of the gravity well, in simple terms stretching and relaxing and hence it will be be subject to tidal forces and subsequent heating .  Not the best description without a diagram perhaps!

Jim

 

ps Andrew said what I was thinking in fewer words  

Brilliant way to explain it, many thanks!

29 minutes ago, wulfrun said:

Sorry if I'm patronising you but "accelerated" here is meant in the strict physics sense - a change in velocity - not the everyday sense of "going faster and faster"

Not at all patronizing, my friend, physics is very specific, thanks for the insight.

As far as I understand, planets orbit each other following the curvature (gravity well) in the fabric of space created by whatever larger body is creating said well. Hat experiment can be seen a million times, the bowling ball on the fabric with the marbles orbiting, every single documentary on the subject explains it to death. So, if gravity is not a force of attraction as once was thought, akin to a magnetic force, then why is it that a moon like Io for example can be so affected by Jupiter? suffering constant flexing and stretching. This in tern creating such friction that it melts Io from within, making it such a volcanically active body.

if Io is merely falling into Jupiter and, not being pulled or yanked along by a force, then why is there such flexing taking place? Jupiter is either physically pulling on it or it is not. One would think if gravity is not a force of exertion then it should not affect Io in thi way, this is where my confusion lies. Have I brought this up before? too lazy to scour my posts.

Great sketch, I too found that some great detail would suddenly pop in those fleeting seconds of stability.

I pose a question to all those who have learned their numbers, lol. Is it possible to calculate the distance of an object by timing how long it takes said object to move from field stop to field stop? with a particular scope/eyepiece combination. Having said that, would a planet cover the distance faster than a much more distant object? I am aware that the movement is due to earths rotation but, technically a much more distant object should move slower across the field of view, no?. Nothing save for an event horizon itself is beyond mathematical explanation, just in my case, beyond my mathematical ability. There must be a way, I think.

Considering it is now 2:30am across the pond, whomever responds to this, I’m sorry for interrupting your observing session 🤣

On 13/06/2020 at 19:34, garryblueboy said:

First try out for this little set up

No counterweight?

Wonderful detail and colour!

Beautiful!

Congrats on Zeta! I myself have spent the better part of the summer trying to split Zeta Herc. Every clear night I’d give it a shot, only lately, just last week did I manage to see the two stars with black between them, seeing was exceptional that night.

Love that double cluster shot, especially.

Photo is not new but, a nice image regardless.

Sounds like you're going to have loads of fun with that ideal grab and go setup, its always nice when things just work well together like that mount and scope.

Beautiful shot!

Welcome to SGL!