The Galaxies Physics proyect.pptx
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A galaxy is a large collection of stars, gas, and dust held together by gravity. The Milky Way galaxy is the one that contains our solar system. There are different types of galaxies including spiral, elliptical, and irregular galaxies. Estimates suggest there are between 100 billion and 200 billion galaxies in the observable universe. The smallest known galaxy is the dwarf galaxy Sextans, while the largest galaxy discovered is over 16 million light years long.
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The Galaxies Physics proyect.pptx
- 2. What is a Galaxy?
- 4. The begginig of galaxies: Quasars
- 5. The Milky Way The Milky way is the galaxy in which we live, it covers the entire solar system and of course our planet, it is located in the center of the local group together with the Andromeda galaxy and the triangle galaxy.
- 6. Types of Galaxies: Spiral Galaxies This ones can be recognized by their wide, flat disks of rotating gas and dust, some spirals have wide flung arms, while others have spirals that are more tightly bound.
- 7. Elliptical galaxies Elliptic galaxies: contain mostly older stars, this means that they are often not as bright as spiral galaxy
- 8. Irregulars galaxies Irregulars galaxies: There are unidentified shapes whose stars, gas and dust are scattered randomly
- 9. How many galaxies are there in the observable universe? An acceptable range is between 100 billion and 200 billion
- 10. The smallest Galaxy This is the dwarf galaxy Sextans which, with a mass 100,000 times less than the Milky Way, has devoured an even smaller companion
- 11. The biggest Galaxy The galaxy, called Alcyoneus, is 16.3 million light-years long, about 80 bigger than the Milky Way.
- 12. What are the closest galaxies to ours? The closest to the Milky Way is the Canis Major dwarf satellite galaxy. Then in order we have: Canis Major dwarf galaxy: 28,000 light years away. Sagittarius Elliptical Dwarf Galaxy: 70,000 light years away. Large Magellanic Cloud: 165,000 light years away. Boötes dwarf galaxy: 197,000 light years away.
- 13. Philosophical thinking We are not alone in space but we do not have the resources and technology to discover whats inside every planet, black holes, galaxies or universes