Star & Gravity Lectures & Notes
Chapter 26 & 12
Hubble Deep Field Activity
Credit: NASA, ESA, S. Beckwith (STScI) and the HUDF Team
Before we discuss stars, we'll have to discuss those gaseous, clumpy areas that formed first...galaxies.
You will be creating Paperslides how-to guide for this; there's also brief directions in Dropbox. This project will be done in class and all videos will be finished & uploaded by the end of the period.
After the day's activity, visit the Hubble.site. First up, a recap of the importance of the deep field image. Then, go to the Dark Energy presentation and take notes. Lastly, visit this 'news flash' that appears to challenge current understanding of dark energy (read the whole story, noting what is unusual about it).
[Extra credit blog available]
6.1 Introduction to Stars...
In the notes, we reviewed our timeline and began discussing some of the forces and concepts behind star formation. Do not forget to supplement your notes with material from your book.
Quick review of gravity - flying through projectile motion and a brief look at orbital motion (which we'll visit again later). A couple of review items as discussed in class: you should remember the formulas for acceleration and velocity (a = (vi - vf)/t, v = d/t) from previous classes. Then, we went over how velocity is direction & speed which means acceleration is experienced when you go the same speed in a circle. Also, don't forget the demo in class: 2 sheets of paper flat vs. 2 wadded up; and 2 wadded sheets of paper vs. 6 wadded sheets of paper. Make sure you add these observations (plus the explanations) to your notes.
6.3 Gas Laws
Okay, we're jumping a bit, but basics you already know: states of matter include solid, liquid, gas, and plasma. While stars are plasma, to model some of the basic interactions, we look at gases (this is because plasma is in essence ionized gas).
We will be doing a gas law simulation in class, so make sure you get these notes and have questions ready right at the beginning of class before we go to the computer lab.
6.4 Star Lifetime & ...
Final bit of notes, finishing up the star lifetime and characteristics for determining where a star is in its lifetime. Don't forget to read the article from class carefully and construct your graph, using the book for the axes labels and numbers. Do not copy the book, construct your own, that is the point.
In this first installment, you get a brief look into the beginnings of astronomy from the view of the ancient world.