PPT-Astronomy 1 –

Fall 2014 Lecture 4 October 14 2014 CLM Fall 2014 Previously on Astro1 Planets appear to move on the sky mostly West to East but occasionally with retrograde motions The ancients thought that the Earth was at the center of the solar system and that planets moved in spheres around the Earth. For many its hard to know how to respond politely to someone who takes this ancient superstition seriously Yet many wellmeaning people develop an interest in astrology because of its constant play in the media and simply dont have the background in and Astronomy. Historically Speaking.... Without astronomy we would not have timekeeping. . and calendars! . Without astronomy we would not be aware of the worlds, including a whole universe of. planets and stars and galaxies,. in Astronomy. Rob Fergus. New York University. Overview. Virtually all our knowledge about the universe derived from measurements of photons. Usually as images. Big astronomy project is $50M-200M. But only 1-2% of this on software. Day One. the universe, astronomy and cosmology. Universe. – totality of all space/time, matter and energy. Astronomy. . – the study of celestial objects, space and the physical universe. Cosmology. Formerly. “. Arabian astronomy” –. too . limiting . geographically. . Used to be. slighted . coverage –. “. caretakers” for Greek works, esp. . Almagest. Now. . called. . “Islamic astronomy” – lands where Islam was dominant. Astro1010-lee.com. twlee2016@gmail.com. Chapter 6. Chapter 6. Our Living Earth. Our Living Earth. Survey of Astronomy. Astro1010-lee.com. twlee2016@gmail.com. Chapter 6. The interior of the Earth has been determined by studying the transmittal and reflection of Seismic Waves within the Earth. Astro1010-lee.com. twlee2016@gmail.com. Chapter 13. Uranus & Neptune. Survey of Astronomy. Astro1010-lee.com. twlee2016@gmail.com. Chapter 13. Uranus was Discovered in 1781 by William Herschel; first planet to be discovered in recorded history.. Astrophysics. A/Prof. Michael Murphy. Centre for Astrophysics. and . Supercomputing. Swinburne University of Technology. Our mission. To inspire a fascination in the Universe through research and education. astronomy ALL IMAGES ASTRONOMY: WILLIAM ZUBACK weight,however,is difficult to supportby hand OUR PLACE IN SPACE. Earth is not special. We do not have any unique place in the Universe. We live on an ordinary rocky planet called Earth, one of nine known planets orbiting an average star called Sun. We are near the edge of a huge collection of stars called the Milky Way Galaxy, which is one galaxy among countless billions of other galaxies spread throughout the observable universe.. 9/11/17. Due . 9/18/17. 1. The eccentricity of a comet is 0.967. Its . semimajor. axis is 17.8 AU. What is its distance from the Sun at perihelion? Aphelion?. 2. An asteroid has a mean orbital radius of 4.12 AU. What is its period?. Early Astronomy . Humans have been fascinated by the sky for all time.. Constellations have helped people navigate, tell stories, are the gods that look over humanity.. Constellations are groupings of stars that form images, much like seeing . . Astronomy. , derived from the Greek words for . star law. , is the scientific study of all objects beyond our world. . Astronomy is not a “stand-alone” science. It combines areas from a number of other fields, including mathematics, chemistry, geology, biology and physics. . 1. Ancient Astronomy. Many ancient cultures took a keen interest in the changing nighttime sky. The records and artifacts that have survived until the present make that abundantly clear. . 2. Ancient Astronomy.