# Physics Lab #4: Learning Starry Night, Part 3

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2 In B2 part 2: Conjunctions and elongations Q4. Examine the current date in the Main Window. When will the next superior conjunction of Venus occur? In B2 part 3: Synodic period Q5. The synodic period of Mercury is days. In B2 part 5: Sidereal and synodic period of Jupiter Q4. The length of Jupiter s sidereal period is days. Q5. The length of Jupiter s synodic period is days. In B3 part 1: Kepler s first law Q6. The length of the major axis of Mars orbit is AU. In B3 part 3: Kepler s third law (you will need a calculator for these questions ) Q7. The sidereal period of Mars is years. Q8. At what distance would a planet have to orbit the Sun on average in order to have a sidereal period of 10 years? In B4 part 1: The phases of Venus AU Q9. What is the phase of Venus in the simulation shown? In B4 part 2: Apparent size of Venus Q10. What is the approximate angular diameter of Venus when it is a very slim crescent? Q11. Which model is supported by your observations?!26

3 In B4 part 3: The moons of Jupiter Q12. Why did the observations described in the text persuade Galileo that the geocentric view of Ptolemy was wrong? Unit C: The Planets Note: Not all questions asked in Starry Night will appear here for this section. In C1 part 1: Orbits of the inner planets Q13. Which of the inner planets has the most eccentric orbit? In C1 part 2: Mercury Q14. What is the length of a Mercury solar day in Earth days? days There are no further questions from C1, although you are encouraged to read through the last few parts. In C2 part 1: Orbits of the outer planets Q15. The eccentricity of the outer planets orbits is close to zero: True / False (circle one) Now skip ahead to Unit E. Unit E: Star Finding In E1 part 1: The Big Dipper Q16. What is the orientation of the Big Dipper asterism in winter? In E1 part 2: Star Hopping Q17. Polaris is part of which constellation?!27

4 In E1 part 3: Polaris and Latitude Q18. What happens to the position of Polaris in your sky as time advances over a period of a year? Q19. What is the relationship between the altitude of Polaris and the latitude of the observer? In E1 part 4: The south star? Q20. What is the nearest star to the south celestial pole, shown in the main window? In E2 part 1: Apparent magnitude Q21. A magnitude 2 star is times brighter than a magnitude 4 star. Q22. Which of the four named stars from the constellation Orion is the faintest? In E2 part 2: Magnitudes of solar system objects Q23. What is the apparent magnitude of the Sun? Q24. What is the 2nd brightest object in our sky? In E2 part 3: Comparing brightness of objects Q25. How much brighter is the planet Venus than the planet Mars on January 24, 2015? times brighter In E2 part 4: Absolute magnitude Q26. What is the absolute magnitude of the star Deneb?!28

5 In E3 part 1: The diurnal cycle of stars Q27. Virgo is considered to be a spring constellation in the northern hemisphere because In E3 part 2: The zodiac Q28. Which of the listed constellations is not a part of the zodiac? Q29. Which of the listed celestial objects is NOT always found near the zodiac? In E3 part 3: Circumpolar constellations Q30. Which of the given statements regarding celestial objects seen at the poles is false? Q31. What is the maximum angular measure that a star at this latitude could possess in order to be considered a circumpolar star? degrees In E4 part 1: Sun signs Q32. Over what time period is the Sun actually in the constellation Sagittarius? Q33. How well do astrologer s dates agree with Starry Night s dates for the passage of the Sun through Sagittarius?!29

6 In E4 part 2: Comparison over time Q34. How closely do the dates of the Sun s passage through Leo in the year 1 CE match the dates assigned by astrologers to the Leo horoscope sign? Q35. How closely do the dates of the Sun s actual passage through Capricorn in the year 2000 BCE match with astrologers Sun sign dates? Q36. When was the last time that the Sun sign positions from astrology accurately reflects the true location of the Sun in the celestial sphere? In E4 part 3: Precession of the equinoxes Q37. The vernal equinox is presently in the constellation Pisces. In what constellation was the vernal equinox located in the year 2500 BCE? In E4 part 4: The 13th constellation Q38. What is the additional constellation through which the Sun now moves, aside from the 12 standard zodiacal constellations? Q39. Astrology has kept pace with our present knowledge of the changing sky: True / False Unit F: The Stars In F2 part 1: Measuring stellar parallax Q40. What is the parallax of Alpha Centauri?!30

8 the dates given above? Which would you give preference to and why? If you don t believe horoscopes are valid in the first place, explain why you think this. You may write your essay in the space below.!32

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