Galaxy

 

 

 

Hey yo peeps!!!!!!! Well we're going to talk about galaxies! So excited to talk about this topic! Anyway  - so what is a galaxy exactly?  Well a galaxy is a huge group of dust, gas and stars and the galaxy is held together by gravity.  Hey look at all the galaxies around us!!!
 

http://wallpaperswide.com/galaxy_4-wallpapers.html

 

 

 

There are about 11111111111111111000000000 galaxies... just kidding.  There are actually 100 billion galaxies.  I know so many galaxies I'll count them 1.2.3 oh never mind. Well about the 100 billion galaxies that's just an estimate. More galaxies are growing right this second! Hey look over there!

http://www.space.com/19075-m81-galaxy-is-pretty-in-pink.html

 

This is my first time were going to time travel. So don't kill me if I mess it up.

http://www.space.com/19075-m81-galaxy-is-pretty-in-pink.html

 

 

Lets go talk to Edwin Hubble...

  

Me: Hi so you found out that all the galaxies are speeding away from us right?

Hubble: Yes I did I also found out about Cepheid variables.

 

Me: What are those?

 

Hubble: Well Cepheid variables are stars.

 

Me: Well that's interesting. Well - we have to go bye!

 

Hubble: Bye!

whoa

 



 

 



Lets talk about superclusters you ask.  A supercluster is a large group of stars! Their so tiny! Superclusters are the biggest structures in the universe!  The average distance between galaxies are ten diameters so far!!!! A huge supercluster it takes about 100 million light years in diameter! That's a lot!

 

http://labs.blogs.com/its_alive_in_the_lab/2013/06/autodesk-gallery-powers-of-design-exhibit-1024-the-local-supercluster.html

 

 

 

 

There are 4 ways you can classify a galaxy. 1) Elliptical- They are shaped like a ball and contain dust, gas and mostly old stars. 2) Spiral- They are disk shaped and they have 2 major arms and many minor arms.  They have mostly mid- aged stars.3) There is also a barred spiral galaxy witch fits into the spiral but anyway. Our galaxy is a barred spiral. They have a band across the middle. 4) Irregular-  This galaxy has no shape at all! They are filled with baby stars!

 http://annesastronomynews.com/photo-gallery-ii/galaxies-clusters/the-bird-eso-593-ig-008-is-a-triple-merger-of-galaxies-composed-of-one-barred-spiral-one-more-irregular-and-a-third-the-head-irregular-galaxy-that-seems-to-be-forming-stars-at-a-frantic-rate-65/

 

 

There is a thing in space called Doppler Shift. Doppler Shift includes Blue shift and Red shift. Blue shift is when a planet is moving toward us and it on the blue side of the scale. Then there is Red shift. Red shift is when its moving away from us and its on the red side of the scale. So blue coming toward us and red away from us.

 

 

 

http://snap.lbl.gov/science/darkenergy.php http://www.alicesastroinfo.com/2009/02/links-from-class/

 

 

 

Well Peace Out!!! :D :D :D :D :D :D :D ;D