How Isaac Newton Changed Telescopes Forever 

Well,when you've put as much effort as the British have into stealing it all,you're going to want to show off your stolen boots at some point lol

If you want more videos featuring the RS collection, Brady's channel Objectivity is devoted to it (almost entirely).

​@@jeffdroogStolen boots as Americans have got? Yea, certainly. LOL

@user-gh3wt2uf2p I suppose the word booty was autocorrected...I stand corrected lol

The curator is very charming I hope he’s featured in other videos.

Not maintained,stole,and now show off to everyone who loves thieves lol Most of the shit the British show off were 100% stolen,and usually stolen by force with murderous colonization.Its amazing hiw much shit people can steal,and thne put on display lol

Objectivity!

would love to see him try and to replicate the perpetual motion machine that he view at the royal society.

Came here to say this

LOL, I did that with my 12" - the "tube" was a plywood box that somewhat resembled a coffin, so I put a plaque in the place I had misjudged the hole.

Yup did that with my 4". I used a piece of sewer pipe for the tube.

I was just about to comment that you can't talk about cardboard Newtonian telescopes with out mentioning John Dobsom.The original Sidewalk Astronomer.

I met him once (John Dobson, not Adam) when he came to Auckland in the 90's - eccentric as anything, but fascinating guy.

Try shrooms, that’s even better

Everybody loves Keith. Much more of him and more fascinating things on Objectivity channel.

A lot of good stuff comes out of China, if it came from america or uk it would easily be 3 times pricier

At that time, for all intents and purposes, he was a real renaissance man! :) After all, we get this phrase from people like him for a reason 😊

The alloy is called 'speculum'. Speculum is particularly colorless. (Warning, 'speculum' is not only the name of that alloy, it is also the name of a medical tool used in gynaecology.) In Newton's time pretty much everything had to be custom made. Generally only rich people could do experimental science because only rich people could afford to hire craftsmen. Newton did everything himself. In Westphall's biography it is described that in his workshop (separate from his quarters) Newton had multiple self-constructed furnaces for casting metal. Newton had to manufacture speculum ingots himself, and do all of the grinding and polishing. (I don't think Newton himself discovered the advantages of speculum, I'm not sure.) Newton also had to manufacture the grinding compounds he used. (For the final polishing the particles of the abrasive compound must be ground down to a size smaller than the wavelength of light. So Newton had to figure out a way to manufacture that.)

@@cleon_teunissen thanks I don't think I thumbs 👍 does your post justice... So a heartfelt thanks.

No, primarily because Newton is very much into alchemy, something most people didn't know about. His notes from the last years of his life has traces of mercury on it...

@@jckatz I highly recommend that you obtain/lend the biography of Newton by Richard Westfall. Another story from that biography: in 1696, in his mid fifties, Newton accepted a government office position in Londen, the position was called 'warden of the Mint'. Westfall writes: Newton packed and set off to London for permanent residence and there were no friends in Cambridge to say goodby to; Newton had never made any friends. As Newton took up the position in London he discovered to his unspeakable annoyance that the position 'warden of the Mint' had been hollowed out and was by that time pretty much only a ceremonial position. The man with actual clout was the 'Master of the Mint'. Westfall writes that Newton started with preparing himself: Newton obtained books on law, and filled many pages with notes. That was wat Newton always did. Whatever knowledge/documentation he could obtain, he obtained, all of it, and made extensive notes. Then Newton started campaigning to be appointed to the position of Master of the Mint. Now, I'm sure that in those days such high profile appointments were determined in the most shady ways: nepotism, bribery, etc. Clearly Newton was particularly ill equipped to be any good at that sort of backhanded business. But: he managed it. He did proceed to the position of Master of the Mint, and once in a position of actual power he became very active in the procecution and conviction of counterfeiters. That episode of Newton's life struck me. It shows an extraordinary character. in any situation: Newton wasn't going to take no for an answer.

If you want to nitpick… they could have filmed that at the end of the session.

@@Scodiddly true

They do affect the image, it's why pictures from Hubble have four pointed stars.

I guess the best analogy to explain why you don't see the stalk(s) is this: The light from a distant object is entering the telescope as a series of 'flat' sheets (the waves) going down the main tube. Only a small fraction of each sheet is blocked by the stalk(s). So, you get the complete image projected into the eyepiece.

Has Adam ever done a really in depth video of his own library ?