lec02 - Lecture 2 Celestial Objects Lecture 2 Purdue...

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Lecture 2 Celestial Objects Lecture 2 Purdue University, Astronomy 364 1
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Lecture 2 Purdue University, Astronomy 364 2 Night Sky • The Moon • A whole bunch of bright dots – Planets – Stars – Galaxies – Clusters of galaxies • Comets, meteors • Clouds • Satellites, airplanes, …
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Constellations Lecture 2 Purdue University, Astronomy 364 3
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Celestial Sphere Lecture 2 Purdue University, Astronomy 364 4
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Equatorial Coordinate System Lecture 2 Purdue University, Astronomy 364 5 The position of a celestial object is specified by two angles: Right Ascension (RA) Declination (Dec) Note: 1) The celestial coordinate system varies with time, due to the “wobbling” of Earth’s spin axis. 2) RA is often expressed in time units (hr, min, sec).
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Lecture 2 Purdue University, Astronomy 364 6 “Moving” Stars
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Lecture 2 Purdue University, Astronomy 364 7 Diurnal Circle
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lec02 - Lecture 2 Celestial Objects Lecture 2 Purdue...

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