ERROR IN VIDEO - There are up to 200 BILLION stars in our galaxy...not 200 million.
How many stars are there in the universe? This question leads Hank to a couple other questions - How many stars can we see from Earth? How many stars are there in our galaxy? - but the answer to the original question proves elusive.
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References:
http://www.universetoday.com/22380/how-many-stars-are-in-the-milky-way/
http://en.wikipedia.org/wiki/Messier_81
http://apod.nasa.gov/apod/image/0709/milkywayband_gleason.jpg
http://www.universetoday.com/24328/how-many-stars/
Tagged under: scishow,science,stars,universe,astropysics,astronomy,alaska,visible,night sky,satellites,planet,galaxy,andromeda,M81,milky ,mass,observable universe,estimate,NASA,Hubble,carl sagan,infinite, edge
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
can do?
With four apps, each designed around existing classroom activities, Spiral gives you the power to do formative assessment with anything you teach.
Quickfire
Carry out a quickfire formative assessment to see what the whole class is thinking
Discuss
Create interactive presentations to spark creativity in class
Team Up
Student teams can create and share collaborative presentations from linked devices
Clip
Turn any public video into a live chat with questions and quizzes
Kathryn Laster
- GaFE Certified Trainer
@kklaster
Tried out the canvas response option on @SpiralEducation & it's so awesome! Add text or drawings AND annotate an image! #R10tech
Room 220 Math Stars
@3rdgradeBCE
Using @SpiralEducation in class for math review. Student approved! Thumbs up! Thanks.
Miss Ord
@ordmiss
Absolutely amazing collaboration from year 10 today. 100% engagement and constant smiles from all #lovetsla #spiral
Adam J. Stryker
@strykerstennis
Students show better Interpersonal Writing skills than Speaking via @SpiralEducation Great #data #langchat folks!
Dr Ayla Göl
@iladylayla
A good tool for supporting active #learning.
Brett Erenberg
@BrettErenberg
The Team Up app is unlike anything I have ever seen. You left NOTHING out! So impressed!