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17 Tonnes of Spinning Glass: Making the World's Largest Telescope
17 Tonnes of Spinning Glass: Making the World's Largest Telescope
17 Tonnes of Spinning Glass: Making the World's Largest Telescope

17 Tonnes of Spinning Glass: Making the World's Largest Telescope - Tom Scott

Tom Scott
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Hi, I'm Tom Scott. These are some of the things I've made and done. They'll probably come back to haunt me in a few years' time. (Want to get in touch about anything? Use the "contact me" link below, not YouTube messages!)

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This week's guest video comes from Active Galactic Videos: go subscribe! https://www.youtube.com/ActiveGalacticVideos/ They got to walk on the dish of a telescope: https://www.youtube.com/ActiveGalacticVideos/

At the Richard F. Caris Mirror Lab, under the football stadium of the University of Arizona, there's an enormous rotating furnace, keeping tonnes of glass heated as it forms the mirrors for the Giant Magellan Telescope. Here's a look inside!
Go Inside a Telescope Mirror Factory | To a Billionth of a Meter

Beneath the University of Arizona football stadium sits the Steward Observatory Mirror Lab. There, giant mirrors are meticulously shaped and polished, to be used in telescopes around the world that are helping unravel the mysteries of the universe. The time-consuming production process requires that each mirror's surface be polished down to a billionth of a meter. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible. Get More National Geographic: Official Site:...

Casting a $20 Million Mirror for the World’s Largest Telescope

Building a mirror for any giant telescope is no simple feat. The sheer size of the glass, the nanometer precision of its curves, its carefully calculated optics, and the adaptive software required to run it make this a task of herculean proportions. But the recent castings of the 15-metric ton, off-axis mirrors for the Giant Magellan Telescope forced engineers to push the design and manufacturing process beyond all previous limits. Read more: https://spectrum.ieee.org/video/aerospace/astrophysics/casting-a-20-million-mirror-for-the-worlds-largest-telescope

If You Detonated a Nuclear Bomb In The Marianas Trench

Thank's Armando Sepulveda, Fernando Arroyo, CGSOS LLC & Twize films for "The Big Wave" project (04:03 - 04:08) in this video. Original footage: https://vimeo.com/222702871 links to their portfolio: https://vimeo.com/user2511802 , https://www.behance.net/arosdaf78a Subscribe to my NEW Channel!!!!! ► "Meet, Arnold!" - https://www.youtube.com/watch?v=NsoJa2pm6Mo If you like this video - put Thumb Up button (please) and Subscribe to Ridddle channel. We will make this universe smarter together! Okay, okay. I got to go..... See You Soooooooooooooooon dudes ;)

How tough is the new Gorilla Glass 5?

We got a closer look at all the torture tests involved in creating Corning's most resistant Gorilla Glass to date. Subscribe to CNET: http://bit.ly/17qqqCs Watch more CNET videos: http://www.cnet.com/video Follow CNET on Twitter: http://twitter.com/CNET Follow CNET on Facebook: http://www.facebook.com/cnet

Dragon-stem Goblet

A dragon-stem goblet has many parts, including a bowl, a foot, and a dragon. Dip molding is used to create the dragon, and the parts are attached with glue bits. This goblet has pincered bits, a merese, an avolio, wings, and eyes. See 360˚ photography and learn more about this object in The Techniques of Renaissance Venetian Glassworking by William Gudenrath http://renvenetian.cmog.org/object/dragon-stem-goblet The Venetian glass industry enjoyed a golden age during the Renaissance. By the early 1500s, the wonders of Venetian glass were well known throughout western Europe. Not well known, however, was how these objects were made. Until now. The...

Really the most intriguing puzzle on the planet!? - The Revomaze Blue

Thanks to Brilliant for sponsoring this episode and supporting Mr.Puzzle! Visit https://brilliant.org/MrPuzzle/ to improve your analytical and problem-solving skills! The Revomaze is advertised to be the "the most intriguing puzzle on the planet". In this Episode, I will have a look at the Blue Revomaze that is the Beginner version, but still with an average solving time of 5 hours. I show you my approach to map it and understand what inside of this cylinder only using available information. Visit me on facebook for additional information: https://www.facebook.com/Mr.PuzzleYouTube/ Support me and be one of my Patrons: https://www.patreon.com/MrPuzzle Subscribe for further puzzle reviews, recommendations and solutions. Music: Mandeville von Kevin...

Why do medieval buildings overhang their lower floors?

Why do medieval buildings such as cottages and castles overhang their lower floors? The Machicolations shirt: https://teespring.com/castle-machicolations Music: Folk Round by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100357 Artist: http://incompetech.com/

Mars, Saturn & Jupiter through my telescope

Sadly, I have had to disable comments on this video, as it attracted a lot of abuse between internet trolls and some of the viewers. I hope you enjoy watching anyway! Some of my videos of Mars, Saturn and Jupiter through my telescope, and the images that I process from them. If you want to see one of the world's best planetary imagers in action, look for Damian Peach on YouTube (http://www.youtube.com/user/planetimager/videos?flow=grid&view=0) or elsewhere on the web! His images are legendary! FAQ's: Q. Why is Jupiter upside down? A. Two reasons - 1) I am in the southern hemisphere, and this is the view that...

FAST: The World's Largest Telescope | A China Icons Video

What's really out there? In September 2016, China unveiled the world’s largest telescope – an instrument engineered so finely it is 3 times more sensitive than Arecibo and may help in the international search for understanding more on the origin of the universe and the Big Bang. Sadly, since filming this video, FAST’s chief engineer and scientist, Professor Nan Rendong lost his fight with cancer. Not only was Professor Nan a talented and well-respected scientist who dedicated over 20 years to the FAST project, but we found him to be a kind, intelligent and dedicated man who took the time...

How To Visit Svalbard

http://tomscott.com - http://twitter.com/tomscott - I had an enormous amount of B-roll footage of Svalbard that I couldn't use, and the internet had a lot of questions about how to get there. Time to solve both those problems in one go!

Optical Glass Sculptures by fine art glass artist Jack Storms - The Glass Sculptor

This video will tell you all about the cold glass process I use to make my work. I hope you enjoy it and please share if you do! Website: http://www.jackstorms.com Facebook: https://www.facebook.com/stormsart Twitter: https://twitter.com/jackhstorms Instagram: http://instagram.com/stormsjack Both a tremendous athlete and a motivated student growing up in New Hampshire, it wasn’t until later in life that Jack discovered his passions in contemporary art and graduated at age 30 from Plymouth State University with a BA in Art focusing primarily on studio production. It was during his junior year there that he happened upon what would eventually become an entryway to his legacy, the studio...

What is Water Hammer?

First 100 people to sign up will get $30 off their first Blue Apron order here: http://cook.ba/2hkRvlY. This video is sponsored by Blue Apron. Hydraulic transients (also known as water hammer) can seem innocuous in a residential setting, but these spikes in pressure can cause major damage to large pipelines and industrial pipe networks. In this video, we briefly discuss how water hammer occurs and how engineers mitigate the effect. -Patreon: http://patreon.com/PracticalEngineering -Website: http://practical.engineering Marxist Arrow by Twin Musicom is licensed under a Creative Commons Attribution License Source: https://www.youtube.com/watch?v=rBlLC8TUXP0 Tonic and Energy by Elexive is licensed under a Creative Commons Attribution License

Why California's Musical Road Sounds Terrible

In Lancaster, California, there's a musical road. When you drive over it, it plays the William Tell Overture. Unfortunately, it's out of tune. Here's why. Thanks to David Simmons-Duffin, who figured this out about nine years ago: http://davidsd.org/2008/12/honda-needs-a-tune-up/ -- he seems to be the first to have figured out not just that it's wrong, but exactly what happened! I'm at http://tomscott.com on Twitter at http://twitter.com/tomscott on Facebook at http://facebook.com/tomscott and on Snapchat and Instagram as tomscottgo

Why Is Blue So Rare In Nature?

Duh, except for the sky… and the ocean… Don't miss our next video! SUBSCRIBE! ►► http://bit.ly/iotbs_sub ↓↓↓ More info and sources below ↓↓↓ Among living things, the color blue is oddly rare. Blue rocks, blue sky, blue water, sure. But blue animals? They are few and far between. And the ones that do make blue? They make it in some very strange and special ways compared to other colors. In this video, we'll look at some very cool butterflies to help us learn how living things make blue, and why this beautiful hue is so rare in nature. SPECIAL THANKS: Smithsonian Institution...

Talking Tom Shorts – Ultra Marathon (All Episodes)

Grab some popcorn and get comfortable - it’s time to binge watch all 23 Talking Tom Shorts! Subscribe to my YouTube channel: https://www.youtube.com/user/TalkingTomCat?sub_confirmation=1 I’m Talking Tom, and I’m the original talking tomcat. It’s great you’ve stopped by. If there’s fun to be had, this cool cat and my friends are probably having all of it! You should definitely check out my shorts, trailers, and gameplay videos featuring me and my friends. Also, keep up to date with my crazy thoughts and ideas via my video blog Talking Tom Brainfarts. You could try looking, but you won’t find a funnier guy anywhere...

Creatures That Evolved To Defend Against Humans

amazing animals with incredible defensive powers and abilities in the wild Subscribe to our channel: http://goo.gl/9CwQhg For copyright matters please contact us at: david.f@valnetinc.com We’ve all heard the saying that it’s a jungle out there – or that it’s a dog eat dog world. Yes, the world can be a tough place, especially if you’re a non-human animal. Insects have to look out for birds and snakes. Birds and snakes need to look out for bigger birds and snakes. And don’t even get us started on what goes on under the sea. It’s nothing like what Disney says it is. Whether in...

Making Artificial Earthquakes with a Four-Tonne Steel Ball

In Göttingen, Germany, there's a four-tonne steel ball that can be raised up a 14-metre tower -- and then dropped in less than two seconds, crashing back to earth. It makes tiny, artificial earthquakes: here's why. Thanks to all the team at Wiechert'sche Erdbebenwarte Göttingen! You can find out more about them here: https://www.erdbebenwarte.de/ Three things I had to cut out of this video, because they didn't quite fit into the story or because I couldn't film them: The reason the steel ball survived two world wars is because the university's records listed it by use as a "rock-ball", not by composition as...

How NOT to Store Passwords! - Computerphile

Security of users' passwords should be at the forefront of every web developer's mind. Tom takes us through the insecure ways in which some websites deal with passwords. Note: At circa 8mins, the animation does not show how the 'salt' is also stored in the database alongside the username. Hashing Algorithms and Security: http://youtu.be/b4b8ktEV4Bg Security of Data on Disk: http://youtu.be/4SSSMi4X_mA More from Tom Scott: http://www.youtube.com/user/enyay and https://twitter.com/tomscott http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: http://bit.ly/bradychannels

Top 10 Tricks Carnivals Don't Want You To Know

Carnival games are tons of fun. However, you better think twice when spending on these games, or you might end up getting played by them. Here are the top ten tricks carnivals wouldn't want you know! Subscribe for more! ► http://bit.ly/BeAmazedSubscribe ◄ Stay updated ► http://bit.ly/BeAmazedFacebook https://instagram.com/BeAmazedVideos ◄ For copyright queries or general inquiries please get in touch: hello@beamazed.com Be Amazed at these tricks carnivals don't want you to know! Balloon tricks - Balloon dart throw is one of the most common games found in carnivals. In this game, you are given a set of darts to pop a balloon. The Duck Pond...

This Video Is 2D And 3D Simultaneously: the Pulfrich Effect

Hold on tight, because with a stabilised camera shot and a pair of sunglasses, you're about to see a video that works in both 2D and 3D at the same time. The technique's called the Pulfrich Effect, and this is how it works. The BBC's terrible 90s Doctor Who special, Dimensions in Time, can be seen here, complete with its Noel Edmonds-filled framing: https://www.youtube.com/watch?v=NQCeMIQpFBc Camera and sound: Matt Gray / http://mattg.co.uk I'm at http://tomscott.com on Twitter at http://twitter.com/tomscott on Facebook at http://facebook.com/tomscott and on Snapchat and Instagram as tomscottgo