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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! They got to walk on the dish of a telescope:

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!
How To Make Parabolic Mirrors From Space Blankets - NightHawkInLight

Parabolic mirrors are useful for everything from solar power to telescopes to holographic projection. They're usually very difficult to make by traditional means, but this video takes a different approach. Check out my sponsor Rayton Solar here: With their incredible silicon cutting process via a particle accelerator they're able to make solar panels with virtually zero waste and a higher efficiency result. AN OFFERING STATEMENT REGARDING THIS OFFERING HAS BEEN FILED WITH THE SEC. THE SEC HAS QUALIFIED THAT OFFERING STATEMENT, WHICH ONLY MEANS THAT THE COMPANY MAY MAKE SALES OF THE SECURITIES DESCRIBED BY THE OFFERING STATEMENT. IT DOES NOT MEAN...

Top 10 Biggest Design Errors Engineers & Architects Made

Designing things is hard. You must go to school for years doing un-fun things like math and physics to become qualified to build most things professionally. And because humans are humans and not calculators, mistakes are bound to occur. In this video I’ll show you 10 bizarre and noteworthy examples of these human errors. Subscribe for more! ► ◄ Stay updated ►◄ For copyright queries or general inquiries please get in touch: Credit:

Top 10 Foods That Originally Looked Totally Different

Everyday foods, fruit and veggies used to look totally different before we started cultivating them. But did you know they haven’t always looked like they currently do? Here are 10 fruits and veggies that looked very different before we started cultivating them! Subscribe for more! ► ◄ Stay updated ► ◄ For copyright queries or general inquiries please get in touch: Credit: Be Amazed at these 10 fruits & veggies that looked VERY different before we started cultivating them! Corn - The evolution of corn is a great example of how we can significantly change a vegetable...

Hyperloop Explained | The B1M

Hyperloop represents the greatest leap in transport infrastructure for generations. Here we explain the concept that's about to revolutionise our world. For more by The B1M subscribe now: Read the full story on this video, including images and useful links, here: Learn more about Virgin Hyperloop One: Learn more about Hyperloop Transportation Technologies (HTT): 3 ways Elon Musk is disrupting construction: Images and footage courtesy of Virgin Hyperloop One, Bjarke Ingels Group (BIG), Hyperloop Transportation Technologies (HTT), Dan Taylor, Tesla, FR-EE, Mexloop, SpaceX, Foster + Partners and DP World Cargospeed. View this video and more at Follow us on...

The Biggest Rocket ever Designed? - The Sea Dragon

In the history of space, one rocket stands out as an icon of not only the space race but of the mighty power it symbolised. Patreon : : You can now translate this and other curious droid videos, see my video about it here At 1:00 there is a spelling mistake showing the payload as 1,1000,000lb this, of course, should be 1,100,000 lbs. That one rocket, which is still the Tallest, heaviest and most powerful ever built, was the Saturn V, which was designed to take men to the moon and later launched the first American Space station, Skylab. But...

Characters, Symbols and the Unicode Miracle - Computerphile

Audible free book: Representing symbols, characters and letters that are used worldwide is no mean feat, but unicode managed it - how? Tom Scott explains how the web has settled on a standard. More from Tom Scott: and EXTRA BITS: Data Security: 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:

Which telescope to buy?

Below are some of the telescopes I've used in recent years, ranging from ~30 -3000 dollars. (shortened for YTs character limits) Price $35 76mm reflector dobsonian mounted (Celestron Firstscope) Weight ~ 1kg (a couple of pounds) Setup time ~0 East of Transport 1 Short focal length- wide angle field of view. Finder not really necessary. Ultra cheap, good views of Moon, Jupiter Venus, rings of Saturn, bright, wide separation double stars, and brighter deep sky objects such as M13. I was not particularly impressed with the optics on mine, but for 35 bucks, you cant complain too much! Price $200 90mm Maksutov-Cassegrain, dobsonian mount (Orion Apex) Weight...


Subscribe! Because SMART IS THE NEW SEXY: How long does it take to get to… Space trips are one of the popular human dreams. Imagine that human techonolgies allow us to move with the speed of light 186,282 miles per second. Where can we go and how fast. And “Smart is the new sexy” have found that information. Do you want to know it? So, sit down and listen. We start. ---------------------------------------------------------------------------------------- Our Social Media: Facebook: The Bright Side of Youtube: 5-Minute Crafts Youtube: ---------------------------------------------------------------------------------------- For more videos and articles visit:

Drones vs Lightning ⚡

At the University of Manchester's High Voltage Laboratory, we see what happens when a DJI Phantom 3 drone gets hit with an electrical impulse of 1.4MV - basically, a lightning strike. Actually, two Phantom 3 drones. We had a backup. Thanks to the team at the High Voltage Lab! Here's their side of the story: And here's a teardown of the drone: The University of Manchester's YouTube channel: You can also follow on Twitter: The HV Lab Vidyadhar Peesapati Manchester Energy School of Electrical and Electronic Engineering Main camera: Fraser Cottrell / Edited by Michelle Martin / @mrsmmartin Audio mix by Matt Gray...

How a Giant Telescope Works

From ESOcast, explore the state-of-the-art technology behind the Very Large telescope, which has provided astronomers with an unequalled view of the Universe. To obtain the sharpest images of the sky, the VLT has to cope with two major effects that distort the images of celestial objects. The first one is mirror deformations due to their large sizes. This problem is corrected using a computer-controlled support system — active optics — that ensures that the mirrors keep their desired shapes under all circumstances. The second effect is produced by Earth's atmosphere, which makes stars appear blurry, even with the largest telescopes....

Boiling Water Until It Freezes

I put water in a vacuum chamber to bring it to its triple point. Making solid oxygen: Music: Bonus video: Help me make videos by donating here:

G-Force, Jerk, and Passing Out In A Centrifuge

Thanks to the Starrship team for arranging this! I'm also over on their channel, flying with the Blades: • At the Royal Air Force training centrifuge in Farnbrough, pilots learn how to avoid G-LOC: g-induced loss of consciousness. Let's talk about g-force, about jerk, and about how to keep circulation flowing to your brain. FAQs: * Isn't 3.6g a really low g-tolerance? * Yep. Turns out I would not qualify to be a fighter pilot. The average range for g-tolerance is 4-6; no-one was expecting me to pass out. The centrifuge team do not deliberately try to G-LOC people! To be fair,...


Subscribe! Because SMART IS THE NEW SEXY: How big is the universe? Have you ever wondered before falling asleep if there’s life on other planets? Or in other galaxies far far away? So far human exploration of the space showed no signs of any form of life. Although the technologies develop really fast and we expect the human mission to Mars anytime soon, there will be decades before we decode at least some of the space mysteries. For now, we are alone. And we are so small. We in Smart is the New Sexy invite you to take a visual...

58 and other Confusing Numbers - Numberphile

Squarespace: More links & stuff in full description below ↓↓↓ More linguistics on Numberphile: Billion and Trillion: Tom Scott on numbers and linguistics - a discussion with spans counties, countries, continents and the far reaches of space. Tom's own channel is: Art and animation by Pete McPartlan Support us on Patreon: NUMBERPHILE Website: Numberphile on Facebook: Numberphile tweets: Subscribe: Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): Videos by Brady Haran Brady's videos subreddit: Brady's latest videos across all channels: Sign up for (occasional) emails: Numberphile T-Shirts: Other merchandise:

World's sharpest Tele lens! Moon, 300x zooming in! 4K, UHD, Leica 2.8/400 mm

World's sharpest super telephoto lens? The video clips where filmed in August 2015 at only 290m above sea level. (Camping side in Germany) Some zooming in and out, and spinning in post production with Magix VDL 2016. Panasonic GH4 and a modified Leica 2.8/400mm + 1.4x + 2x + 2x Leica Apo Extender. I wanted make the viewer, to feel like observing the moon from a space craft. I made some test with a "Siemens Star" this summer, resolution = 1mm at 480m (0.43 arcsec.) !! This means 1200 lines/mm, of course wide open! Also read: Diffraction-limited system ...

What Are the Chemicals In Our Bread | How to Make Everything

HAPPY NEW YEAR FROM HTME! WE HAVE A LOT PLANNED FOR 2018. But first, to wrap up our last episode in our Preservatives Series. Have you ever wondered what all those complicated ingredients are in your white bread? Are they dangerous and what are they actually doing to the bread? Is it true that some breads are made using drywall and human hair? Andy visits a Baker and a Food Scientist to learn the pros and cons of using additives in your bread. He takes that knowledge and makes two batches of his own. Thank you to Baker's...

Will and Can we Visit Uranus?

My Twitter: Will humans ever visit this alien ice giant? Also are we even in ability to visit Uranus right now with current technology? In this video i give my take on the situation Intro and outro made with Space Engine. Music: Kevin MacLeod - Martian Cowboys

Tom Fell Through A Frozen Lake In Estonia

On a bench in Tartu, Estonia, we welcome Paul (@cr3) along with art from Simon (@mushybees) to talk about our road trip, an abandoned submarine base, and, yes, the incident where Tom fell through ice into a frozen lake. Also, rainbow Comic Sans. TOM: -- MATT: -- PAUL: And thanks to our artist, Simon Coxall, !

How The Arecibo Telescope Could Help Save The World

The radio telescope at the Arecibo Observatory in Puerto Rico can do something that most radio telescopes can't: it can transmit. And that's useful for something other than sending messages to the stars: it might just help save the world one day. More about the Arecibo Observatory: Behind the Scenes, including helmet-cam footage of the walk to the telescope, over on the Park Bench: Camera and audio mix: Matt Gray Animation: Mat Hill Edited by: Michelle Martin @mrsmmartin I'm at on Twitter at on Facebook at and on Snapchat and Instagram as tomscottgo

SpaceX Killer - The Great Rocket Race | MUST WATCH

Just a few months ago, Spacex's Falcon Heavy created History by not only sending a car to Outer Space but also landing the Boosters with Pin point accuracy. It may seem that the Future of Space Race will be dominated by SpaceX, or is it? In this video we look into the Competitors of SpaceX, some of whom have great plans to take on SpaceX , by launching reusable rockets like Jeff Bezos's Blue origin or by simple efficient and low cost manufacturing process as implemented by India, whose low cost seems to have baffled even the experts. We look at different...

Spinning Sphere of Molten Sodium

An experiment on how turbulent convection in Earth's core makes a magnetic field Get a free audiobook with a free 30 day trial at or text Veritasium to 500-500 Huge thanks to Prof. Dan Lathrop and team: Companion video to explain Earth's magnetic fields in more detail: Australians! I'm on my way. I'll be doing live shows in Perth, Sydney and Melbourne. Details and tickets here: Find out more about the film Vitamania: Special thanks to Brady Haran and Periodic Videos for sodium vs water footage. Original clip is here: Special thanks to Patreon supporters: Donal Botkin, Michael Krugman, Jeff Straathof, Zach...

Science vs the Weather: Salford's Energy House

At the University of Salford's Energy House, all the energy use is monitored and controlled, allowing researchers to experiment with all sorts of insulation and energy-saving techniques. But how to control for factors like sun, wind and rain? The solution: put the whole house inside an environmental chamber: a building inside a building that means the weather is controlled, repeatable, and part of the science. Thanks to all the team at the University of Salford's School of Built Environment: you can find more about them, and about the house, here: And they're on YouTube here; This video edited by Michelle Martin (@mrsmmartin) I'm...