AST101H1 Study Guide - Midterm Guide: Orbital Period, Northern Hemisphere, Apparent Retrograde Motion
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AST101H1 Full Course Notes
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Which of the following is false? (a) our solar system contains many planets (b) our galaxy contains many solar systems (c) our universe contains many galaxies (d) our galaxy contains many stars (e) our solar system contains many stars. Imagine you are an alien living on a planet 50 light from earth. You use a very, very powerful telescope to look at earth. If you look at earth today, you would see earth the way it did, does, or will look in the year: (a) 1913 (b) 1963 (c) 1988 (d) 2013 (e) 2063. To the naked eye, neptune is blue in colour. Compared to light with a high frequency, light with a low frequency: (a) is infrared light (b) has a shorter wavelength (c) appears bluer in colour (d) travels slower in a vacuum (e) has less energy. Both record a spectrum of light from the cloud.