Facts about the the solar system

The Solar System is the system of the and the objects that it. It when a dense region of a collapsed, forming the Sun and a . The Sun is a typical star that maintains a by the of hydrogen into helium at its , releasing this energy from its outer . Astronomers [pdf]
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Chemical composition of the solar system

The chemical composition of the Universe is dominated by hydrogen and helium produced in the Big Bang1. The remaining 90 or so chemical elements are produced in stars and constitute only a few percent of the overall mass1. The chemical composition of the solar system has been determined from a combination of spectroscopy on the Sun, studies of the solar wind, and by chemical analysis of meteorites2. [pdf]
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Photovoltaic solar panels composition

Around 90-95% of solar panels are made of silicon semiconductor solar cells, often called photovoltaic (PV) cells. In each cell, silicon is used to make negative (n-type) and positive (p-type) semiconductors, which are layered on top of each other. [pdf]
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