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Survey of Astronomy

Introduction. Welcome. This is Phys 1040 and Astro 1040. Survey of Astronomy. Astro1010-lee.com. Please pick up one each of the papers on the table up front. twlee2016@gmail.com. Introduction. Survey of Astronomy. Astro1010-lee.com. twlee2016@gmail.com. Introduction. My e-mail.

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Survey of Astronomy

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  1. Introduction Welcome This is Phys 1040 and Astro 1040 Survey of Astronomy Astro1010-lee.com Please pick up one each of the papers on the table up front. twlee2016@gmail.com

  2. Introduction Survey of Astronomy Astro1010-lee.com twlee2016@gmail.com

  3. Introduction My e-mail By far the best way to contact me is by e-mail. twlee2016@gmail.com Survey of Astronomy Astro1010-lee.com twlee2016@gmail.com

  4. Introduction My Web Page • http://www.astro1010-lee.com/ • Syllabus • Copies of my Slides • Lecture Notes • Links Survey of Astronomy Astro1010-lee.com twlee2016@gmail.com

  5. Introduction Text There is no Text, only the Slides and Lecture Notes • Tests • 5 unit tests • NO comprehensive final • Must be taken on the day scheduled (I can change the date but you can NOT) • Absolutely no late tests • May be taken early • I DROP YOUR LOWEST TEST SCORE Survey of Astronomy Astro1010-lee.com twlee2016@gmail.com

  6. Introduction Astrolab (see link) • You need to attend one • Dr. Powell offers only a finite number • I recommend that you go to an early one Survey of Astronomy Astro1010-lee.com twlee2016@gmail.com

  7. Introduction Term Papers • Select from the list of Subjects that t provide. These are designed to be associated with the lectures. If you email them to me on the designated day you will get full credit, anytime after that is half credit. Survey of Astronomy Astro1010-lee.com twlee2016@gmail.com

  8. Exercise 1

  9. Exercise 1 The purpose of this exercise is for the student to determine the circumference of the Earth using a variation of the Erotosthenes method Survey of Astronomy Astro1010-lee.com twlee2016@gmail.com

  10. Exercise 1 • Requires • Protractor • Thread • Tape • Weight • Find the North Star • Measure the angle from the Horizon to the North Star Survey of Astronomy Astro1010-lee.com twlee2016@gmail.com

  11. Exercise 1 This is how your protractor should look after you get it ready Survey of Astronomy Astro1010-lee.com twlee2016@gmail.com

  12. Exercise 1 NCP NCP Survey of Astronomy Astro1010-lee.com θ1 θ2 twlee2016@gmail.com

  13. Survey of Astronomy Astro1010-lee.com twlee2016@gmail.com

  14. Chapter 1 astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

  15. Chapter 1 astro1010-lee.com Survey of Astronomy BEGINNINGS twlee2016@gmail.com

  16. Chapter 1 Astronomy -- Study of the Universe Universe -- everything that exists • Solar System • Planets • Moons • Asteroids • Comets • Other debris • Earth/Moon System • Galaxy • The Milky Way is our Galaxy • Stars • Open Star Clusters • Globular Star Clusters • Nebulae • Sun • Solar System astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

  17. Chapter 1 Subtend When an object just fills an angle it subtends that angle. astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

  18. Chapter 1 Angular Units Degree (of arc) = 1/360 Circle Minute (of arc) = 1/60 of a Degree Second (of arc) = 1/60 of a Minute Hour (of arc) = 360/24 = 15 degrees astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

  19. Chapter 1 Distance Measure in Space astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

  20. Chapter 1 OUR CODE The Earth and the entire Universe obey a single set of Laws astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

  21. Chapter 1 Scientific Theory and the Scientific Method Scientific theories: must be testable must be continually tested should be simple should be elegant Scientific theories can be proven wrong, but they can never be proven right with 100% certainty astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

  22. Chapter 1 Scientific Theory and the Scientific Method • Observation leads to theory explaining it • Theory leads to predictions consistent with previous observations • Predictions of new phenomena are observed. If the observations agree with the prediction, more predictions can be made. If not, a new theory can be made. astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

  23. Chapter 1 Early Discoveries • Pre-historic • Sun • Moon • Stars • Constellations • Planets • Movement of the Sky • Path of the Sun • Movement of the Moon • Historic • Cyclic nature of the Universe ….. led to calendars • Explanation of the phases of the Moon • NCP • Celestial Equator • Explanation of the seasons astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

  24. Chapter 1 Earth’s Orbital Motion Daily cycle, noon to noon, is diurnal motion – solar day Stars aren’t in quite the same place 24 hours later, though, due to Earth’s revolution around Sun; when they are, one sidereal day has passed astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

  25. Chapter 1 From season to season the stars that we see change. This is because of the motion of the Earth in it orbit. The ancients thought it was because the Sun moved around the Earth astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

  26. Chapter 1 The 12 constellations that the Sun appears to move through during the year are called the zodiac; the apparent path is the ecliptic astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

  27. Chapter 1 The Earth revolves around the Sun once each year causing the Sun to appear to move around the sky astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

  28. Chapter 1 • Time from one vernal equinox to next is tropical year • Combination of day length and sunlight angle gives seasons astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

  29. Chapter 1 Precession: rotation of Earth’s axis itself; makes one complete circle in about 26,000 years astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

  30. Chapter 1 The Terrestrial Coordinate System Latitude is measured north and south from the equator Longitude is measured east and west from the prime meridian astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

  31. Chapter 1 Zenith is the point directly overhead Meridian is the line from the north point through the zenith and on to the south point. Horizon is the line on the sky made by the plane that is perpendicular to the vertical line from you to the zenith astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

  32. Chapter 1 The Celestial Coordinate System Reference points and planes on Celestial Sphere astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

  33. Chapter 1 The Celestial Coordinate System Right Ascension (RA) or Hour Angle is measured from the point on the sky where the Sun is at the Spring Equinox Declination (δ) is measured north or south from the Celestial Equator astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

  34. Chapter 1 Go to Chapter 2 astro1010-lee.com Survey of Astronomy twlee2016@gmail.com

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