Adam Riess -- Dark Energy Video
MASTER CLASS: Module 4: -- Adam Riess: Dark Energy
Take the full Masterclass here: http://www.worldscienceu.com/courses/master_class/master-class-adam-riess
Subscribe to our YouTube Channel for all the latest from World Science U. Like us on Facebook: https://www.facebook.com/worldscienceu Follow us on Twitter: https://twitter.com/worldscienceu
Module 4: Dark Energy—Review
There are still many answers to discover.
- In 2011, Adam Riess shared the Nobel Prize in Physics with Brian P. Schmidt and Saul Perlmutter. But their work was far from over.
- We still do not understand the quantum underpinnings of dark energy, and still do not have a quantum theory of gravity.
- What we do have is the "recipe" for the universe. We know it's made of about 0.05% planets, 0.5% stars, and 4% gas. Less than 5% of our entire universe is made of normal (what we refer to as baryonic) matter.
- About 25% of the universe is dark matter, and the remaining 70% is dark energy, meaning about 95% of the entire universe is in a form that we don't quite understand.
- Fortunately, new instrumentation continues to help us probe these mysteries. In 2009, astronauts returned to the Hubble Space Telescope and installed two new cameras to aid in dark energy research.
New techniques for studying dark energy are constantly being invented.
- One new technique that Adam Riess is using with the new Hubble cameras is an improvement to the method of parallax.
- As previously mentioned, parallax loses accuract when the stars are very far away—for some such supernovae, the angle change his team is trying to measure can equate to 1% of a single pixel on the Hubble's detector.
- To increase the accuracy of these measurements, the camera is "dragged" along one direction while the shutter is open. Instead of getting two points of light, the telescope now measures two parallel lines of light.
- This makes it much easier to measure the separation—many more points of reference are involved in the measurement.
Studying dark energy is incredibly exciting for astrophysicists.
- Most of our universe consists of dark energy and we still do not understand its fundamental properties.
- Dark energy will dictate the fate of our universe, depending on how it changes over time.
- Most excitingly, the research touches upon three of the central pillars of modern physics—quantum mechanics, general relativity, and string theory.
- Studying dark energy might give us a clue of how to study physics at the interface of incompatible and mysterious regions of physics.
About the Site 🌐
This site provides links to random videos hosted at YouTube, with the emphasis on random. 🎥
Origins of the Idea 🌱
The original idea for this site stemmed from the need to benchmark the popularity of a video against the general population of YouTube videos. 🧠
Challenges Faced 🤔
Obtaining a large sample of videos was crucial for accurate ranking, but YouTube lacks a direct method to gather random video IDs.
Even searching for random strings on YouTube doesn't yield truly random results, complicating the process further. 🔍
Creating Truly Random Links 🛠️
The YouTube API offers additional functions enabling the discovery of more random videos. Through inventive techniques and a touch of space-time manipulation, we've achieved a process yielding nearly 100% random links to YouTube videos.
About YouTube 📺
YouTube, an American video-sharing website based in San Bruno, California, offers a diverse range of user-generated and corporate media content. 🌟
Content and Users 🎵
Users can upload, view, rate, share, and comment on videos, with content spanning video clips, music videos, live streams, and more.
While most content is uploaded by individuals, media corporations like CBS and the BBC also contribute. Unregistered users can watch videos, while registered users enjoy additional privileges such as uploading unlimited videos and adding comments.
Monetization and Impact 🤑
YouTube and creators earn revenue through Google AdSense, with most videos free to view. Premium channels and subscription services like YouTube Music and YouTube Premium offer ad-free streaming.
As of February 2017, over 400 hours of content were uploaded to YouTube every minute, with the site ranking as the second-most popular globally. By May 2019, this figure exceeded 500 hours per minute. 📈
List of ours generators⚡
Random YouTube Videos Generator
Random Film and Animation Video Generator
Random Autos and Vehicles Video Generator
Random Pets and Animals Video Generator
Random Travel and Events Video Generator
Random People and Blogs Video Generator
Random Entertainment Video Generator
Random News and Politics Video Generator
Random Howto and Style Video Generator
Random Education Video Generator