Astronomy 1021 Study Guide - Kuiper Belt, Oort Cloud, Galilean Moons

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Document Summary

Solar system and telescopes: all three techniques (imaging, spectroscopy, timing) are used in the study of the solar system. Measuring distances: we know the radius of earth, and observations during the front transit allow us to measure this parallax angle, so using geometry, we can calculate the distance to venus. Measuring sizes: with the aid of telescopes, we can measure the angular diameter of planets, since we also know the distance, we can calculate the diameter in km. Measuring mass: observe moons going around the planet measure angular distances and orbits and periods tells you the mass of the planet, from mass and size: we get density. Rotation: telescopes, telescopes and spacecraft"s each have advantages and disadvantages. Hampered by location (earth or earth orbit) Cheaper, can be used long-term and upgraded. Lots of new objects still to find. Can get close to solar system objects: better spatial resolution. Take a long time to build, launch, travel.

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