Last Friday, we spent class reviewing eachother's constellation fact sheets. Each student recieved 3 people for whom he or she was to read their sheets and grade them. Because that class was short and unchanging, I am also blogging for today's science class on May 11.
Today at the beginning of class we had a quick discussion about Branimir; the astrophycsicist that came to our class and talked to us last week. We wrote him some of our comments and criticisms on his lecture, which included the following:
Lack of media
Shorten his bullets on his powerpoint
Speak louder and clearer
Interact with the students more
Simplify some vocab
Showed enthusiasm and true knowledge of the subject
Interesting at most parts
Branimir has never taught to students our age; and I think he deserves an extra arm of applause for having the courage to do so now. In about three days, he becomes a doctor of astrophysics.
From the discussion, Ms.D continued to show us the Star Notes Powerpoint we had started to watch in one of our previous classes. Our final exam will include most of this information, which is why I will include a summary of the most important facts below.
-Blue stars are the partiers. They are hot, big, young and die fast.
-White stars are middle everything. Middle aged, middle sized and middle brightness.
-Red stars are old, colder and dying.
A globular cluster is a glob of stars
Galaxies are large systems of stars in dust (interstellar matter)
There are several million galaxies with several trillion stars in each one.
There are three main types of galaxy:
Our galaxy is a spiral galaxy
Have lots of interstellar matter
Has arms and a a black hole in the middle
-Very little interstellar matter
-No shape, distorted due to gravity from neighbouring galaxies
We know other galaxies exist because of the use of math, and pictures taken using radio waves
Additionally, we learned what a Hertzbrung Russel graph is. It is a graph that explains how stars age.
Next, we were taught how a star dies. There are basically three different ways of stellar death, and how they go is based on their mass.
-If the star is the mass of our sun:
Red Dwarf: Running out of fuel
Red Giant: Out of fuel
White dwarf-Hot, small star, dead when it runs out of energy
No worries, our sun won't die for another 4 million years, and we'll most likely die out by then anyways.
-If the star is 4x the mass of our Sun
Same steps as Sun
Past White Dwarf
Electrons+protons combine = neutrons= neutron star!
The neutron star then becomes stronger than nucleur forces inside of an atom
-If the star is 10x the mass of our sun
-Same steps as previous deaths
-Past neutron star
-Collapses past nucleur forces
-Forms a gravity well-cosmic vacuum cleaner
-Which then turns into a black hole
In the middle of our discussion, we also talked about atoms and molecules , and learned that zombies are actually just reanimated atoms.
At the end of class we began a discussion on the Big Bang, but ran out of time. For the next class the volleyball girls will not be here to take notes so I hope the next blogger does a supreme job of summing up the class.
We have no homework for Thursday.
Also the following link is something spiffy I found that stimulates all of the astronomical events we discussed in class.
Additionally, something I personally found intriguing was that when we look into space, we look into the past since things are so many light years away. For example, if there is a galaxy one billion light years away, we won't know its dead until a billion years from now.
The next blogger is Cornelia.