chapter 1: a modern view of the universe

  Composers: Eric Idle & John Du Prez Author: Eric Idle Singer: Eric Idle From the 'Meaning of Life' album

Just remember that you're standing on a planet that's evolving And revolving at nine hundred miles an hour, That's orbiting at nineteen miles a second, so it's reckoned, A sun that is the source of all our power. The sun and you and me and all the stars that we can see Are moving at a million miles a day In an outer spiral arm, at forty thousand miles an hour, Of the galaxy we call the 'Milky Way'.

Our galaxy itself contains a hundred billion stars.It's a hundred thousand light years side to side.It bulges in the middle, sixteen thousand light years thick, But out by us, it's just three thousand light years wide. We're thirty thousand light years from galactic central pointWe go 'round every two hundred million years, And our galaxy is only one of millions of billions In this amazing and expanding universe.

The universe itself keeps on expanding and expanding In all of the directions it can whizAs fast as it can go, the speed of light, you know, Twelve million miles a minute, and that's the fastest speed there is.So remember, when you're feeling very small and insecure, How amazingly unlikely is your birth, And pray that there's intelligent life somewhere up in space, 'Cause there's bugger all down here on Earth.

Galaxy Song

https://www.youtube.com/watch?v=buqtdpuZxvk

https://www.youtube.com/watch?v=vIy76M-4txo

Chapter 1: A Modern View of the Universe

•  The Scale of the Universe•  How big is it?•  What is our place in it?

•  The History of the Universe•  How did we come to be?•  How do our lifetimes compare?

•  Spaceship Earth•  How is Earth moving?•  How do stars, galaxies move?

Misc. Housekeeping Items•  MasteringAstronomy.com

–  link to text: “The Essential Cosmic Perspective”

•  Online assignments don’t need email submission–  submission is automatic from textbook webpage

– All homework due on class day at class time•  Register i>clicker on Sakai, through link to this course:

–  17F-PHYS133010: INTRODUCTION TO ASTRONOMY

•  Labs don’t start till week of Monday Sept. 11

Chapter 1: A Modern View of the Universe

•  The Scale of the Universe•  How big is it?•  What is our place in it?

•  The History of the Universe•  How did we come to be?•  How do our lifetimes compare?

•  Spaceship Earth•  How is Earth moving?•  How do stars, galaxies move?

Quick i-clicker quiz on Ch. 1 reading

A. About a secondB. About a minuteC. About 8 minutesD. About a dayE.  About a year

How long does it take light to travel from Sun to Earth?

How long does it take light to travel from Sun to Earth?

A. About a secondB. About a minuteC. About 8 minutesD. About a dayE.  About a year

How long does it take light to travel from Alpha Centauri to Earth?

A. About a monthB. About a yearC. About 4 yearsD. About 1,000 yearsE.  About 100,000 years

A. About a monthB. About a yearC. About 4 yearsD. About 1,000 yearsE.  About 100,000 years

How long does it take light to travel from Alpha Centauri to Earth?

How long does it take light to travel�across our Galaxy

A. About a monthB. About a yearC. About 4 yearsD. About 1,000 yearsE.  About 100,000 years

How long does it take light to travel our Galaxy

A. About a monthB. About a yearC. About 4 yearsD. About 1,000 yearsE.  About 100,000 years

https://mediaplayer.pearsoncmg.com/assets/secs-a-modern-view-of-the-universe

Chapter 1 pre-lecture overview

from the study area of your MasteringAstronomy website, click on:Study AreaMediaPrelecture OverviewsChapter 1: A Modern View of the Universe

Assignments for next Wed.1. In MasteringAstronomy.com, Do "Online Exercise 00", which includes the "Scales of the Universe Tutorial". Be sure to select the "submit item" button at the end of the tutorial. This initial online exercise will be for practice, and will not count toward your  homework grade. ��2.  Register your own personal i-clicker via UDel Sakai system, by logging onto course:�    17F-PHYS133010: INTRODUCTION TO ASTRONOMY��3. Continue studying Ch. 1 of textbook, "The Essential Cosmic Perspective" by Bennett et al. (7th edition)�