Galaxies!!! BY: anderson de jesus

  • What is a galaxy? A galaxy is a group of millions to billions of stars held together by gravitational force.
  • How many galaxies are there? There is an estimated 100 billion galaxies, but as time continues there will be way more.
  • What happens when two galaxies get to close to each other? The two galaxies would then collide causing gas being released and triggering shock waves that will form new stars in the now combined galaxies.
  • In the following slides I will show you a few known galaxies.
  • This is the Milky Way Galaxy, the galaxy that we live in.
  • The Milky Way Galaxy is made up of 100-400 BILLION stars in it, and has been existing for an estimated 13.21 billion years.
  • There is one constellation in the Milky Way Galaxy and that is Sagittarius.
Pictured above is Sagittarius
  • The galaxy closest to the Milky Way is called Andromeda.
  • It is very hard to know exactly how many star Andromeda contains but it is an estimated 1 trillion!
  • Andromeda is about 2.5 million light years away.
  • The constellation that is in Andromeda is also called Andromeda due to it resembling the daughter of Cepheus and Cassiopeia in Greek mythology.
  • Who would need a high quality telescope to view the constellation Andromeda.
This is the constellation Andromeda
  • The Pinwheel Galaxy given this name due to it's unique shape is an estimated 20.87 million light years away from the Earth
  • There is are actually 2 constellations in the Pinwheel Galaxy 1 being Ursa Major and with in Ursa Major is actually the Big Dipper.
  • The apparent mass of this galaxy is 1,000 billion M☉(Solar Mass) and just 1 M☉would be would be 2 with 30 0's!
This is Ursa Major which is Latin for larger bear. If you look towards the tail of the bear you can see the Big Dipper.

Citations: https://www.nasa.gov/multimedia/imagegallery/image_feature_2265.html

http://earthsky.org/clusters-nebulae-galaxies/andromeda-galaxy-closest-spiral-to-milky-way

http://www.space.com/19915-milky-way-galaxy.html

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