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Last name (print): ____________________ First name (print): ___________________ Date of Lab: ____________________ Time of Lab: ____________________ Observations of the Moon and Planets Pre-Lab Worksheet Directions: Complete this worksheet before you leave for the lab. The pre-lab worksheet is usually worth 20% of the lab grade. Read the entire lab including the items listed under “Preparation”. Part 1 – The Moon Using the Moon map in your Mag-5 Atlas, answer some of these questions: 1) Which hemisphere of the Moon contains a larger fraction of “maria” ? (circle) northern or southern ?, eastern or western ? 2) Between new moon and full moon, we see a sharp dividing line between the dark and the illuminated side of the moon. What is this line called ? ____________________. 3) Pick a crater from the list on the lower right of the moon map. Find that crater on the map. Measure its distance in X and Y from the center of the grid which bisects the Moon. If 1 inch = 320 miles on the map, how far from the center point is the crater you selected ? X (inches) = ______, X (miles) = ______, Y (inches) = ______, Y (miles) = _______ 4) If lunar phase cycle, also known as its synodic period, is 29.5 days, how many days does it take for the moon to go from new to first quarter phase ? ________________. 5) Thought question: Why do you think lunar craters are largely round in appearance ? Part 2 – The Planets Using your textbook or a web-based information source, lookup the average distance in astronomical units of the planets in our solar system. Planet Mercury Venus Earth Mars Distance in AU 1.0 Jupiter Saturn Uranus Neptune Pluto Which planets are visible with the unaided eye ? ______________________________ Which are not visible without a telescope ? __________________________________