1. Give the three conditions needed for a TOTAL solar eclipse, noting 1) phase,
ID: 286735 • Letter: 1
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1. Give the three conditions needed for a TOTAL solar eclipse, noting 1) phase, 2) ecliptic, and 3) distance 2. Explain why, when going out for a night of observing, you should start by first observing objects in the western sky 3. Describe changes in the noon Sun's altitude and days' duration here in Pensacola from June through December. 4. Describe how Ptolemy's model accounted for retrograde motion. 5. Contrast the Copernican explanation for retrograde motion. Only select from this section if you need to do more than 5 questions. DO NOT ANSWER ANYTHING FROM THIS SECTION IF YOU HAVE NOT ALREADY COMPLETED THE 5 FROM ABOVE. THEY WILL NOT BE GRADED. If you need 6-10 questions, do all 5 above, then pick from these: 6. If a refractor telescope has an objective lens 60mm in diameter, and 900mm in focal length calculate the magnification you get viewing through a 10mm focal length eyepiece. 7. Compare the light gathering power of the 60mm objective with your eye's exit pupil of 6 mm. 8. Draw and label both a solar eclipse and a lunar eclipse. Label the sun, the earth, the moon, the umbra and the penumbra in both drawings. 9. Describe the position and motion of Polaris as observed from Pensacola over the course of several hours. 10. Where on the Earth would you be if the Sun rose on September 23rd, stayed up for six months, and set on March 21st? Only select from this section if you need to do more than 10 questions. DO NOT ANSWER ANYTHING FROM THIS SECTION IF YOU HAVE NOT ALREADY COMPLETED THE 10 FROM ABOVE. THEY WILL NOT BE GRADED. If you need more than 10 questions, do all 10 above, then pick from these as well: 11. Explain why the solar eclipse of May 30, 1984 was annular, but the eclipse of August 21, 2017 was total. 12. Even though the eclipse of 2017 is classified as a total solar eclipse, explain why, here in Pensacola, we got only a partial e 13. Contrast the placement of the eyepiece in Newtonian and Cassegrain reflectors; what about the internal arrangement within these scopes makes this placement necessary 14. Contrast the observed retrograde motions of Mercury with that of Mars 15. Why is Polaris, even in historic times, not always the "pole star"? 16. What clue to Kepler's first law is offered by the oppositions of Mars, according to Tycho clipse?Explanation / Answer
1. The three conditions required are as follows:
a) The moon has to be in between Sun and Earth i.e the moon has to be in a New moon phase.
b) The moon has to be close to earth to appear as same size of sun or larger. If its not close enough or in fact almost right on we will not see total solar eclipse.
Please ask rest of the questions in separate questionnaire.
c) The Sun and moon needs to line up exactly in the line of observer's location otherwise the observer will see the partial solar eclipse
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