Astronomy 101 -- Worksheet #2THE ECLIPTIC, SEASONS, PHASES of the MOON, and ECLIPSES1) The Sun appears to change its position slightly from day to day,completing a full circuit around thecelestial sphere every year.This apparent motion of the Sun relative tothe background stars is due to______________________________________ .2) The name giventothe apparent path of the Sun on the skyisthe _____________.3) The angle on the celestial sphere between the celestial equator and the ecliptic is ________________ .4) The 18° wide band in the skycentered on the ecliptic is known as the ___________________. This isthe region in the skywhere the __________, __________, and _______________ are always found.5) The noon-time Sun appears higher in the skyinthe summer,and lower in the skyinthe winter (asviewed in the Northern Hemisphere). The changing noon-time altitude of the Sun in the skyduring theyear results from the fact that ________________________________ and__________________________________.6) The Vernal Equinox occurs when the Sun crosses the celestial equator as it heads North, marking thefirst day of spring. On March 21, the Right Ascension and Declination of the Sun are _____________and __________.7) The Summer Solstice occurs when the Sun reaches its most northerly location in the sky, giving us thelongest period of daylight in a given24hour period and marking the first day of summer.OnJune 21, theRight Ascension and Declination of the Sun are ________________ and ________________.8) The Autumnal Equinox occurs when the Sun crosses the celestial equator as it heads South, markingthe first day of autumn. On Sept. 21, the Right Ascension and Declination of the Sun are __________and __________.9) The Winter Solstice occurs when the Sun reaches its most southerly location in the sky, giving us theshortest period of daylight in a given24hour period and marking the first day of winter.OnDec. 21, theRight Ascension and Declination of the Sun are ________________ and ________________.10) Here on Earth, we observedifferent constellations in different seasons. This is because of_________________________________.11) The tilt of the Earth’saxis of rotation relative tothe plane of its orbit around the Sun and the revolu-tion of the Earth around the Sun both contribute to cause the ___________________.12) Precession is ___________________________________________________________________________________. It is caused by the combined effects of-2-______________________________ and _____________________________.13) As the Moon _________________ around the Earth, it undergoes a cycle of ______________ onceev e ry 29.5 days.14) The Moon changes its location on the celestial sphere quite noticeably from day to day,and com-pletes one entire circuit around the ecliptic once every _______________.15) When the Sun, Moon and Earth are all precisely aligned, we experience _____________________.However, wedonot experience ____________________ every month because the orbit of the Moonaround the Earth is tilted by __________ relative tothe orbit of the Earth around the Sun.16) The phases of the Moon result from the combination of 2 factors:____________________________________ and ________________________________________________________.17) Relative tothe location of the Sun in the sky, the Full Moon is located in the __________ direction.The Full Moon rises at approxmiately ____________________.18) Relative tothe location of the Sun in the sky, the NewMoon is located in the __________ direction.The NewMoon rises at approximately ____________________.19) The First Quarter Moon rises at approximately ____________________.20) The Third Quarter Moon rises at approximately ____________________.21) The fact that the same side of the Moon is always facing us indicates that_______________________________.22) When asolar eclipse occurs, the phase of the Moon must be __________; to see the eclipse, the timemust be __________. When a lunar eclipse occurs, the phase of the Moon must be __________; to seethe eclipse, the time must be __________.23) Retrograde motion is ______________________________________________________________.24) If aplanet and the Sun are found in the same direction in the sky, the planet is said to be in____________________. If aplanet and the Sun are found in opposite directions in the sky, the planet issaid to be in ____________________. When a planet is in opposition, it will rise at _______________.When a planet is in conjunction, it will rise at