Astronomy 1021 Chapter Notes - Chapter 6: Giant-Impact Hypothesis, Correlation Does Not Imply Causation, Microgram
11 Oct 2017
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6. 1 a brief tour of the solar system. The sun and planets are all quite small compared to the distances between them so small that if we viewed them from the outskirts of our solar system, the planets would be only pinpoints of light. The solar system: large bodies in the solar system have orderly motions. All planets have nearly circular orbits going in the same direction in nearly the same plane. Most large moons orbit their planets in this same direction, which is also the direction of the. Composition: 98% hydrogen and helium, 2% other elements. The sun is the largest and brightest object. It contains more than 99. 8% of the solar system"s total mass. The sun"s surface area is a rolling sea of hot (~5800k) hydrogen and helium gas. It is speckled with sunspots because they are slightly cooler than their surroundings. The temperature and pressure both increases with depth in the sun.
