Sizing Up the Universe - Hubble Onward

Описание: The early years of the 20th century brought evidence that galaxies we were observing were not static in position, but rather appeared to be receding from our point of view. Could we be at the center? Is there a center? Are objects in the universe actually in motion? Are the apparent "velocities" galaxies and other objects constant?

Sir Edwin Hubble, working on the 100 inch telescope at Mount Wilson Observatory, came to be known for his mathematical analysis of the distance versus velocity relationship of galaxies visible to him in his time, deriving what we now call Hubble's Law, and setting the foundation for the Big Bang Theory. How did he do it?

In this SMAP Live presentation, we provide students historic, as well as more modern (and accurate) measurements Purdue University theoretical astrophysicist, Dr. Paul Duffell leads the way.

Your students can do this lesson too! Find the lesson worksheet, Excel data file, and Professor Duffell's PowerPoint here; look for the folder, Sizing up the Universe - Hubble's Law.
https://bit.ly/SMAPSelectedLessons

Timeline
0:00 Introduction
2:10 Hubble's contributions and setting the stage
6:06 Breakout - modeling the data from Hubble to today
9:58 The y-intercept
20:45 Comparing students' results for the age of the universe
26:44 Outliers - the most distant galaxies
30:50 Is there a center to expansion?
35:44 What is space expanding into?
38:05 Distance = velocity x time - what's wrong?
43:52 Dark energy
45:25 Multiple universes?

Check out Dr. Duffell's, The Astrophysics Podcast,    / @paulduffell  

The thumbnail for The Expanding Universe was artfully created by Jonathan Sullivan-Wood, Purdue University Dept. of Physics and Astronomy.