REVIEW CH #0 TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 1) Right ascension in the sky is very similar to latitude on the Earth. 1) 2) Latitude and right ascension are coordinate systems used to find objects on the celestial sphere. 2) 3) The celestial sphere is divided into 88 modern constellations. 3) 4) The south celestial pole is located at a declination of -90 degrees. 4) 5) Constellations are close clusters of stars, all at about the same distance from the Sun. 5) 6) The sidereal day is determined by the Earth's rotation with respect to the stars. 6) 7) The vernal equinox marks the beginning of spring in the northern hemisphere. 7) 8) There are 3,600 arc seconds in a degree. 8) 9) From Earth, the Sun and Moon have about the same angular diameter. 9) 10) From full moon to third quarter moon takes about a week. 10) 11) There is a solar eclipse of some kind every new moon. 11) 12) Eighteen days past new moon, the Moon's phase is waning gibbous. 12) 13) The larger the parallax shift, the closer an object is to us. 13) 14) In the scientific method, it is not necessary to test your theory. 14) MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 15) The star Wolf 1061 has a parallax of 2.34 arc seconds, while the star Ross 652 has a parallax of 1.70 arc seconds. What can you correctly conclude? A) Ross 652 must have a larger proper motion than Wolf 1061. B) Both stars are outside the Milky Way galaxy. C) Ross 652 is closer to Earth than Wolf 1061. D) Wolf 1061 must have a larger proper motion than Ross 652. E) Wolf 1061 is closer to Earth than Ross 652. 15) 16) In an annular eclipse, 16) A) the Moon appears as a thin, bright ring. B) the Sun appears as a thin, bright ring. C) the Sun is partially blocked by the Earth. D) the Sun is totally blocked by the Moon. E) the Moon is totally blocked by the Earth. 1
17) If the Moon appears half lit, and is almost overhead about 6:00 AM, its phase is 17) A) first quarter. B) waxing crescent. C) waning crescent. D) full. E) third quarter. 18) If new moon fell on March 2nd, what is the Moon's phase on March 14th? 18) A) first quarter B) waxing crescent C) waxing gibbous D) full E) waning crescent 19) What will occur when the full moon is on the ecliptic? 19) A) a total lunar eclipse B) an annular lunar eclipse C) a partial solar eclipse D) a total solar eclipse E) a partial lunar eclipse if the Moon is at perigee 20) The fact that the Earth has moved along its orbit in the time it took to rotate once is the reason for 20) A) the position of the Celestial Equator. B) precession. C) seasons. D) the difference between solar and sidereal time. E) Earth's 23.5-degree tilt. 21) That Polaris will not always be the pole star is due to 21) A) the sidereal day being shorter than the solar day. B) precession shifting the celestial pole. C) the Earth's revolution being slightly less than exactly 365.25 days. D) the Moon following the ecliptic, instead of the equator. E) the Solar winds blowing the Earth farther away from the Sun. 2
22) This diagram explains 22) A) precession. B) the reason for the solstices. C) the difference between solar time and sidereal time. D) the solar day's relation to the Moon. E) the sidereal day's relation to the seasons. SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 23) The apparent annual path the Sun takes through the sky is called the. 23) 24) Our seasons are a consequence of the Earth's 23.5 degree. 24) ESSAY. Write your answer in the space provided or on a separate sheet of paper. 25) What are the minimum and maximum values for declination in the sky for both north and south? 26) Which star shows the least motion in the northern sky over the course of an hour? 27) The last quarter moon rises tonight about midnight; when will it rise, and what will its phase be tomorrow night? 3
28) We get a new and full moon every month. Why don't we get two eclipses every month? 4
Answer Key Testname: CH0REVIEW 1) FALSE 2) FALSE 3) TRUE 4) TRUE 5) FALSE 6) TRUE 7) TRUE 8) TRUE 9) TRUE 10) TRUE 11) FALSE 12) TRUE 13) TRUE 14) FALSE 15) E 16) B 17) E 18) C 19) A 20) D 21) B 22) C 23) ecliptic 24) axial tilt 25) From the equator at 0 degrees, to +90 degrees for the north celestial pole, and down to -90 degrees for the south celestial pole. 26) Polaris, the North Star, lies within a degree of the celestial pole, and does not move noticeably with the naked eye over an entire night. 27) It will rise about an hour later, about 1 AM, and be a waning crescent by then. 28) The Moon's orbit is tilted 5.2 degrees to the Earth's orbit (the ecliptic), and the disks of the Sun and Moon are only about.5 degrees wide. Most months the new and full moon pass too far from the ecliptic for the Earth's and Moon's shadows to make eclipses occur. 5