In order to understand how we study the universe, we need to talk a little bit about light. Light is a form of energy. Its wavelength tells us its energy and color. Spectroscopy allows us to analyze those colors and determine an object’s temperature, density, spin, motion, and chemical composition.
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7.9 2007 HD
7.3 2018 HD
8.598 1980 HD
8.4 2019 HD
8.471 2014 HD
8.3 2010 HD
7.79 2010 HD
0 2002 HD
8.9 1995 HD
7.7 2012 HD
6.6 2011 HD
7 2023 HD
7.7 2009 HD
6.8 2020 HD
0 1991 HD
0 2014 HD
0 2021 HD
8.4 2023 HD
8 2019 HD
9 2021 HD
