Lecture 7 - The Solar System

Lecture 7 the solar system

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Unformatted text preview: The Solar System ASTRONOMY 3 Lesson 7 1 Note: The sizes of the planets and Sun are plotted to scale, but not the distances between them! NATURE of the Universe Astronomy - The Solar System Review of Lesson 6 Telescopes are either refractors (collect the light with a lens) or reflectors (collect the light with a mirror). Larger telescopes collect more photons. The light-gathering power scales with the area of the telescope. The angular resolution of a telescope is proportional to the observing wavelength and inversely proportional to the diameter of the telescope. The smaller the angular resolution gets, the better it is. Gamma rays, X-rays and far infrared radiation are absorbed by the atmosphere. For observations in these regions of the electromagnetic spectrum, telescopes have to be placed above Earth's atmospheres. 2 NATURE of the Universe Astronomy - The Solar System Questions from Lesson 6 Think about (questions from Lesson 6): Why do all planets orbit the Sun in the same direction? Why do all planets orbit the Sun in the same plane (the ecliptic)? 3 NATURE of the Universe Astronomy - The Solar System Today's Topics Inventory of the Solar System (Ch. 4.1) Interplanetary Matter (Ch. 4.2) The Formation of the Solar System (Ch. 4.3) Summary & Homework Extra Credits (Essay) & Review of Homework 1 4 NATURE of the Universe Astronomy - The Solar System Inventory of the Solar System The 8 planets and the 3 currently known dwarf planets of the solar system. 5 NATURE of the Universe Astronomy - The Solar System Inventory of the Solar System "Side view" of the Solar System All planets orbit the Sun in a plane close to the ecliptic. Pluto's orbit is inclined by 17 degree with respect to the ecliptic. 6...
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This note was uploaded on 10/13/2008 for the course ASTR 3 taught by Professor Hauser during the Fall '07 term at UCLA.

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