Phases of the Moon
Objective: To monitor the Moon's motion through the sky for 5 weeks as it orbits the Earth. Phases of the Moon
Objective: To monitor the Moon's motion through the sky for 5 weeks as it orbits the Earth.
You should turn in a pdf file including your starchart, logsheet, and writeup.
Note: Concentrate on getting consistent observations over 5 weeks. There will be cloudy nights when you will be unable to observe – be sure to note those dates on your observing log.
• Start this project early in case you don't have enough clear weather to complete a good sequence of observations.
• To measure the position of the moon compared to nearby stars, recall that your fist is 10 degrees across when you fully extend your arm.
• Using a red filter with your flashlight when you go out at night will help to preserve your "night vision".
• Always be careful - don’t put yourself at risk to do this project - go out in a safe place or take someone with you.
1. (20 pts) Make an observation of the moon in the sky at least 3 nights a week for 5 weeks. On the logsheet attached here note the date, time and weather (clear, hazy, scattered clouds, etc) for each attempt. In the last space draw a rough sketch of the phase of the moon.
2. (20 pts) On the star chart attached here – in pencil – sketch the moon against the background of stars as you see it. Use a pencil so that you can redraw it if you make a mistake. Make sure that you have the orientation of the moon to the stars correct. Clearly mark the date of each moon that you draw on the star chart. All of your observations will be on the same star chart.
3. (10 pts) The sidereal period of the Moon is 27.3 days. From this statement, calculate the number of degrees per day that the Moon moves with respect to the background stars. Do your observations agree with your calculations? Discuss why or why not.
Before you hand this in – be sure that you have FOLLOWED ALL THE INSTRUCTIONS!!
|Due By (Pacific Time)
||07/27/2015 10:59 pm