What is the difference between energy and power? What is a unit of power? How do
September 11, 2021A beam of light has a wavelength of 506 nanometers. What is the frequency of the light? What color is the light?
September 11, 2021
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Astronomy is the study of celestial objects.
Astro- is a Greek prefix that comes from ‘astros,’ which means ‘star’.
-onomy comes from the Greek suffix ‘-nomia’ which means ‘law.’
So astronomy literally means law of stars.
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