My Barlow lense is stuck? Any ideas to fix it?

The Master! Well done Bravo and thanks.

12 years later and these guys are still proving how Gen Z is so cooked. Simple, practical, no bs, just beautiful.

When do this it stays on the change time thing for a second then changes off to alignment mode

Thank you for your review i am looking for a first occasional telescope and think I've just found it

Why are there no subtitles?

Wow point well made about letting telescope adjust to temp. Thanks.

very simple explanation, thank you

i join this clip because i expect see injector in all the wall of the chamber so dont have to deal with wall recooling.

th problem of this injector is the cant throtle right? because the spray cant be achived because angle of impact is diferent when flow is lower or higher.

Awesome information for my new binoculars. Thanks for covering the loops on the eyepiece cover. I thought one of the loops on my cover was broken until you explained it in your video. Thank you.

Thanks for sharing. Regarding the hole in the steam pot's primary reaction chamber (where the h2o2 mixes with KMnO4), I wonder if the hole was there just to prevent pooling of the h2o2 before launch. Without the hole, and some kind of residual pressure on the tanks prior to launch, peroxide could theoretically pool on there, and as you said, catalyst is injected 1st, so a predictable start up would not want a cup full of peroxide waiting for you already while the startup sequence is initiated? Just a thought. Would also explain why there is no hole on the ship missile, as it probably was never used or started in a vertical orientation to allow pooling?

very beautiful explaination Thanks!!

Excellent

Wow what impressive research and what a Genius in narrating it. Thank you for sharing with us!

My best views of Jupiter was under 35° more like 16 or 17, the atmosphere showed the browns and reds a treat

I've never seen any roadmap where the width of the roads drawn on the map were scaled to the actual road width. If they were the lines would have to be so thin that you couldn't see them. Same for the dots on the map that represent towns and cities. It's the distances 'between' objects that the scales point to that the scales apply to. I get the point of your analogy. The index lines are as wide as a degree. It's why we use our eyes to try and subdivide them. I agree with the problem of trying to get accurate with the gradients on dials and generally the larger the diameter of the dial, or scale the better off you are. Of course that goes out the window when the dial is sloppy, wiggly, and moves in any way. I run into the same problem in the machine shop. Most often I'm going for accuracies of +-0.001" (0.0254mm). If I'm lucky I can dial things into about 0.0005". I've installed DROs that read reliably down to 0.0001. I also dabble in watchmaking. In that world with wrist watches you're looking at accuracies on a scale of 0.001mm depending on what you're doing .

Hey, aren't you the guy raving about Wernher von Braun's turbo pump!?

Did someone install the alcohol impeller backwards on the museum model? It doesn’t look like its rotation matches the turbine bucket direction.

Ty for actually showing us pics and videos of you using it lol.. for some reason no one wants to do that with any yt videos about telescopes I am interested in.. 🤦🏻‍♀️ So thank you for taking the time from your life to make this video demonstration I very much appreciate you ❤

You bloody nerd! You are the best thing I have seen in the past 4 days. It's 2024, I'm in Argentina and "Killroy was here". I am trying to get my first telescope, a chinese copy of AZ1 reflector. Bought it as if would be the real thing. Thank you so much sir for the video!

Robert is a knowledgeable and unassuming guy, a true expert on Astronomy and Telescopes. I only wish he'd do more videos.

I have got to buckle down and learn how to do the culminating BEFORE I GET THE SCOPE. I heard the laser guider? is very helpful to you. And do not worry I would want to look through it too of course.

14:02 Zou said SA-75, but zou mean S-75.....also known as SA-2 Guideline (NATO reporting name)

If you are not a teacher you should be

While this is an a excellent video I'd like to point out that the Turbo Pump in the musemum would not work in real life. The fuel impeller is installed backwards, the convolutes on both pumps MUST be in the same direction. The steam nozzles indicate the correct direction of rotation and the Oxygen impeller flutes are correct to create pressure, the fuel must turn in the same direction and its flutes are the reverse of the Oxygen. The Russan Turbo pump shows it correctly. :) Old USN pump guy! Otherwise a great video, grew up around someone who later became the youngest Flight Director for several years for the Air Force. I learned a few things from him over the years.

I bought this telescope to my daughter. Great video and perfect instructions. Thank you very much 😀

Great video ! thank you !

Your video is fantastic very interesting

Superb presentation. Thank you.

Before the R-11 (Scud A), the R-2 started being designed in 1946 and entered service in 1951. It also had the characteristic V-2 shape, but was longer. The Scud entered service in 1957, the year if the R-7's first orbital flights.

Wow. Thank you! I just began reading Galileo's Starry Messenger and your video provides the perfect complement. Thank you!!

Greetings Robert, Thank you for this OUTSTANDING presentation!! It really puts into perspective the characteristics as to WHY (unbeknownst to then) beginning astronomy enthusiast's endure such disappointment during their fiest outtings with their new scope! Which typically leads tofrustration, packing up early in the evening and going home during group/club observing nights. Especially here in Oklahoma where the sky conditions are subject to great and frequent variations. In fact your presentation is so informative I'm going to use your 3 Laws of Telescopics as the subject matter at out next meeting. I hope you don't mind. I believe our new budding astronomers will find it quite the"eye opening experience" ! I also realize the time and effort that went into making this presentation so let me say once again, a HUGE Galactic Thank You!

Now I really want to know what kind of torque that steam rotor can generate.

FYI for those of you that hunt and use spotting scope w/ eyepieces the ND filter in 3 different % of transmission works very well and why I say 3 is don't forget about the blinding snow.And you thought the moon was bright, that's why I have all 3 ND filters to stack them as needed.And the yellow 12 and 11 work real good.Now heres a little secret I'll give you try a 21 orange and the color of the deer pops out at you.If it will work in all parts of the country I don't know.But in N.C. G.A.T.N. V.A. S.C. our season starts as early as Aug.then Sep and so on.its worth a try, if not you have a good Mars filter for the ice caps. Good luck

So since there is no way i could put my own telescope in orbit i guess i need to build a 62 mile long refractor

Love your videos, dare I say would a torch and heat not get her free rather than cutting :(. Either way out of interest where do you find all the parts for your videos? Epic history. Thank you

This is the best telescope in this price range.

Excellent review as always! Good tips for those who already have it, and those that don't yet but will. I just bought one of these with portability in mind and it is very impressive on the Moon and Saturn so far. Jupiter will be a big test for it. I bought the version with the "full size tripod", and while not great, it does the job. Mine also has a finder - it's so bad I don't know why they bothered. I stopped trying to use it after an hour in a two hour first session. It's fine without the finder on the Moon and planets, but so far I've found it difficult to get to brighter stars. I wish they would have provided a way to add a standard finder shoe. I'd stick a Telrad on this but it's too big for this tiny Mak! I'm going to just use it as a portable planetary 'scope but it would be nice to split some doubles with this. I have a small stable of telescopes (including a 127 Mak) but a recent move has made it difficult for me to use them since I have to observe in a city park nearby, so lately I've been sticking with binoculars. But the Sarblue it so portable and so quick to set up and acclimate to ambient temperaturess I"m bringing it along on my binocular sessions as well. So glad you're still doing videos on this channel, Robert. Your videos helped me tremendously when I got started in 2019 and they will continue to help beginners for years to come!

Thank you very much sir. I have a skywatcher and had no idea that you could separate the eye piece holder

Prices have gone up significantly since this video was made 😞

An amazing piece of research!

What type of telescope is on the table

Real British history here folks. Outstanding fellas.

Rob, love your videos. have learnt so much I own one of the original Peenmunde wind tunnel models (c. 1939/40). If you live in London am happy to show it to you. might be a future video kindest regards Simon

love your videos. Have learnt so much. I own one of the original Peenmunde wind tunnel models c. 1940. If you live in London happy to meet up and show it to you. Might help you with one of your videos

This is the perfect documentary in all aspects. And one more + for the Little Mole from Czechia:)

Thanks!

Thanks for the video, When the clouds clear I will try what you said do. Saturn is high enough for viewing this month.

very good video.