Share Presentation:   http://NeoK12.com/pres/ZGALAXY2
About Galaxies
  
Black hole windby thebadastronomer on Flickr

  • A galaxy is a massive gravitational bound system that has stars and stellar remnants and interstellar of gas and dust and is made of 90% of dark matter. 
  • The word galaxy comes from the Greek word Galaxias which literally means "milky". 
  • The closest galaxy to the Milky Way is called Canis Major Dwarf. 
  • It is inside the Milky Way and is 42 000 light years away from the galactic center and 30 000 light years away from  our solar system.
Slide Options : Move UP,   DOWN,   DELETE,   Insert BLANK Slide
Hubble image of Arp 274by thebadastronomer on Flickr

  • There are three types of galaxies. 
    1. The first and possibly the most beautiful galaxy is the spiral galaxy that obviously is shaped like a spiral
    2. Second is the elliptical galaxy which is shaped like a football
    3. Third is the irregular galaxy and it has no distinct shape. 
  • The biggest type of galaxy is the giant elliptical galaxy. 
  • Most galaxies have around 10 000 000- 100 000 000 000 000 stars.
Slide Options : Move UP,   DOWN,   DELETE,   Insert BLANK Slide
Galactic Wreckage in Stephan's Quintetby NASA Goddard Photo and Video on Flickr

Andromeda galaxy is a tad larger than our galaxy the Milky Way. We are going to crash into each other in about 3-5 billion years. If the crash happens, there is a high possibility that the two galaxies will form one massive galaxy.
Slide Options : Move UP,   DOWN,   DELETE,   Insert BLANK Slide
Suzaku Catches Retreat of a Black Hole's Diskby NASA Goddard Photo and Video on Flickr

  • There is believed to be a super massive black hole at the galactic center of our universe.
  • A black hole is a invisible force that has such gravity that it can pull in even light. 
  • There is one theory that if you make to the other side of the black hole, you go through time. 
  • Fortunately, we are not close enough to get sucked into a black hole.
Slide Options : Move UP,   DOWN,   DELETE,   Insert BLANK Slide

 Share this Presentation:  http://NeoK12.com/pres/ZGALAXY2NeoK12.com - Educational Videos, Lessons, Quizzes & Presentations