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Date: Thursday, February 28, 2008 Time: 9:01 PM Brenda - astronomy assignment 3
a) What you think the Earth would look if you look at it from the Moon. Do you think it will have different phrases? Why? Ans: The Earth will look the same as it is when being viewed on the Moon. The Earth will experience phases when being viewed from on the Moon. The Earth revolves and rotetes thus, some parts of the earth do not redlect light, causing the phases. Build a Sun-Earth-Moon system. Go to a position above the Earth and the above the Moon, and observe each view for a year ( 365 days). You can use the counter at the bottom of the screen. b)how are the earth and the Moon lit? Why do you think they are lit this way? Ans: They are both lit by reflecting sunlight from the sun. They are lit this way as they both do not create light on their own and since the sun is their nearest star, they both reflect light from it. Observe the Earth from the Moon, the Satellite view of the Sun , and any other views of your choice. c) how the phases in the Earth change? The Earth will rotate thus one side of the Earth will be in darkness while the other will be lit.  
d) How does the angle among Sun , earth and Moon change? The angle of the Moon and Earth will change as they revolve and rotete around the Sun.
e) What do you think is causing the phases of the Earth? How does your observation from the evidence fit with your thought? If not, what did you find out from this exercise that you did not know before? I think the phases of the Earth is caused by earth's constant rotating and revolving which changes the side of the Earth where it reflects the Suns light. My observation fits my thought except for that of how the Earth's constant revolution can affect its phases. Yours Sincerely,  |
