Support MinutePhysics on Patreon: http://www.patreon.com/minutephysics
Aatish Bhatia helped write this video! A big thanks for his help! Here's his blog: http://www.empiricalzeal.com
The universe is expanding – this we know from looking at red shifts of distant galaxies – but the acceleration of the universe's expansion is harder to measure. It requires measuring the change of recession velocity over time, and it's done by comparing Type Ia supernovas as standard candles at different distances, which is how we know the universe is accelerating!
Thanks to everyone who supports MinutePhysics on Patreon!
Link to Patreon supporters here: http://www.minutephysics.com/supporters.html
Type Ia supernovae
Hubble diagram for type Ia supernovas (relatively close to earth): http://www.pnas.org/content/101/1/8/F3.expansion
Ryan Foley talking about WFIRST & Dark Energy
Dark Energy FAQ:
Why does dark energy make the universe accelerate?
David Spergel on dark matter & WFIRST
Permlutter article (old article but quite well explained & goes into future directions near the end)
Mukhanov’s Physical Cosmology
Nobel Prize Summary
MinutePhysics is on Google+ - http://bit.ly/qzEwc6
And facebook - http://facebook.com/minutephysics
And twitter - @minutephysics
Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!
Created by Henry Reich
Tagged under: physics,minutephysics,science
Clip makes it super easy to turn any public video into a formative assessment activity in your classroom.
Add multiple choice quizzes, questions and browse hundreds of approved, video lesson ideas for Clip
Make YouTube one of your teaching aids - Works perfectly with lesson micro-teaching plans
1. Students enter a simple code
2. You play the video
3. The students comment
4. You review and reflect
* Whiteboard required for teacher-paced activities
With four apps, each designed around existing classroom activities, Spiral gives you the power to do formative assessment with anything you teach.
Carry out a quickfire formative assessment to see what the whole class is thinking
Create interactive presentations to spark creativity in class
Student teams can create and share collaborative presentations from linked devices
Turn any public video into a live chat with questions and quizzes