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Intro to Astronomy

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Intro to Astronomy

  1. 1. IntroductionIntroduction toto ASTRONOMYASTRONOMY
  2. 2. Latest Astronomy NewsLatest Astronomy News Last shuttle missions:Last shuttle missions: 1) STS-1331) STS-133 Launch Target:Launch Target: Nov. 1, 2010, at 4:33 p.m. EDTNov. 1, 2010, at 4:33 p.m. EDT Shuttle:Shuttle: DiscoveryDiscovery Duration:Duration: 11 days11 days 2) STS-134Launch Target:2) STS-134Launch Target: Feb. 26, 2011, at 4:19 p.m. ESTFeb. 26, 2011, at 4:19 p.m. EST Shuttle:Shuttle: EndeavourEndeavour Duration:Duration: 10 days10 days
  3. 3. Latest Astronomy NewsLatest Astronomy News Small Asteroid to Pass Within Earth-Moon System TuesdaySmall Asteroid to Pass Within Earth-Moon System Tuesday A newly discovered car-sized asteroid will fly past Earth early Tuesday. TheA newly discovered car-sized asteroid will fly past Earth early Tuesday. The asteroid, 2010 TD54, will make its closest approach to Earth at 6:51 EDT a.m.asteroid, 2010 TD54, will make its closest approach to Earth at 6:51 EDT a.m. (3:51 a.m. PDT). Image credit: NASA/JPL(3:51 a.m. PDT). Image credit: NASA/JPL PASADENA, Calif. – A small asteroid will fly past Earth early Tuesday within the Earth- moon system. The asteroid, 2010 TD54, will have its closest approach to Earth’s surface at an altitude of about 45,000 kilometers (27,960 miles) at 6:50 EDT a.m. (3:50 a.m. PDT).
  4. 4. Latest Astronomy NewsLatest Astronomy News NASANASA
  5. 5. It all started with…It all started with… The “Big Bang” Theory…The “Big Bang” Theory… Currently our best model to explain theCurrently our best model to explain the origin of the universe.origin of the universe. It states that the universe beganIt states that the universe began approximately 15 – 20 billion years agoapproximately 15 – 20 billion years ago in a very hot state that expanded andin a very hot state that expanded and eventually condensed into galaxies.eventually condensed into galaxies.
  6. 6. The Big Bang…The Big Bang… According to the Theory, allAccording to the Theory, all mattermatter andand energyenergy in thein the universe was concentrateduniverse was concentrated into ainto a singlesingle point (no biggerpoint (no bigger than the smallest part of anthan the smallest part of an atom).atom).
  7. 7. The Big Bang TheoryThe Big Bang Theory
  8. 8. The Big Bang and stars…The Big Bang and stars…  During the 1During the 1stst nano seconds, the basic elementsnano seconds, the basic elements formed: Hydrogen and Helium.formed: Hydrogen and Helium.  As a result, stars began to form by theAs a result, stars began to form by the condensation of interstellar gas…condensation of interstellar gas…  HydrogenHydrogen  HeliumHelium  OxygenOxygen  NeonNeon  CarbonCarbon  NitrogenNitrogen
  9. 9. Interstellar gas and clouds…Interstellar gas and clouds… These gases can form aThese gases can form a nebulanebula – a cloud of gas– a cloud of gas and dust in outer space.and dust in outer space. These can be 100s ofThese can be 100s of light years huge!!!light years huge!!!
  10. 10. What is a light year?What is a light year?  Since outer space is so HUGE, astronomers andSince outer space is so HUGE, astronomers and physicists use a “Light Year” to measurephysicists use a “Light Year” to measure distancedistance in space.in space.  Speed of light = 186,000 miles per a second orSpeed of light = 186,000 miles per a second or 300,000 km a second.300,000 km a second.  In ONE year, light travels 5,903,000,000,000In ONE year, light travels 5,903,000,000,000 miles (~6 trillion miles) or 9,500,000,000,000 km.miles (~6 trillion miles) or 9,500,000,000,000 km.
  11. 11. EXAMPLE OF HOW FAR A LIGHTEXAMPLE OF HOW FAR A LIGHT YEAR IS…YEAR IS…  Andromeda Galaxy is theAndromeda Galaxy is the “nearest” galaxy from Earth. -“nearest” galaxy from Earth. - It is 21 quintillion miles away!!!It is 21 quintillion miles away!!!  21,000,000,000,000,000,00021,000,000,000,000,000,000  2.1 x 102.1 x 101919  2 – 3 million light years away!!!2 – 3 million light years away!!!
  12. 12. Stars and Galaxies…Stars and Galaxies… An accumulation of billionsAn accumulation of billions of stars can create aof stars can create a galaxygalaxy.. There are 3 basic types ofThere are 3 basic types of galaxies…galaxies…
  13. 13. SpiralSpiral
  14. 14. EllipticalElliptical
  15. 15. IrregularIrregular
  16. 16. Solar Systems….Solar Systems…. Within these galaxies,Within these galaxies, solarsolar systemssystems can form.can form. A solar system includes planets,A solar system includes planets, their satellites, minor planets,their satellites, minor planets, comets, meteoroids, and othercomets, meteoroids, and other objects revolving around a centralobjects revolving around a central star, such as our Sun.star, such as our Sun.
  17. 17. Space Exploration…Space Exploration…  Sputnik -October 4, 1957Sputnik -October 4, 1957
  18. 18.  Apollo 11 -Apollo 11 - July 16,July 16, 19691969
  19. 19. Space ShuttleSpace Shuttle

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