Astronomy Assignment #1
... What angle does the stars nightly path make with respect to the eastern and western horizons? What reference point is a celestial object on when it is at its highest position above the horizon? Why do observers in the northern hemisphere see celestial objects north of the celestial equator for more ...
... What angle does the stars nightly path make with respect to the eastern and western horizons? What reference point is a celestial object on when it is at its highest position above the horizon? Why do observers in the northern hemisphere see celestial objects north of the celestial equator for more ...
CopernicanRev
... What are those tiny lights in the sky? Why do some lights wander among the others? (7 Planetes* - Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn) Pythagoras of Samos ~500 BCE Earth is a sphere* Mathematical perfection* (Note: separation of ideal from reality) All complex phenomena must result from ...
... What are those tiny lights in the sky? Why do some lights wander among the others? (7 Planetes* - Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn) Pythagoras of Samos ~500 BCE Earth is a sphere* Mathematical perfection* (Note: separation of ideal from reality) All complex phenomena must result from ...
Introduction to Celestial Spheres (Professor Powerpoint)
... these stars in the sky or, 3000 you can only physically see about one half of the sky. ...
... these stars in the sky or, 3000 you can only physically see about one half of the sky. ...
Copernican Revolution Part 1
... Why do some lights wander among the others? (7 Planetes* - Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn) No science in ancient Greece (comparison of theories & evidence) Pythagoras of Samos ~500 BCE Earth is a sphere* Mathematical perfection,* (Note: separation of ideal from reality) All complex ...
... Why do some lights wander among the others? (7 Planetes* - Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn) No science in ancient Greece (comparison of theories & evidence) Pythagoras of Samos ~500 BCE Earth is a sphere* Mathematical perfection,* (Note: separation of ideal from reality) All complex ...
Lecture 6 Recall: Geocentric Model of Solar System
... exactly uniform motion in circles around the Sun, which still did not agree that well with the observations. – This problem was fixed by Kepler, who removed the assumption of uniform motion in circles (see below) • Heliocentric model has multiple centers: Moon goes around Earth, Earth and other plan ...
... exactly uniform motion in circles around the Sun, which still did not agree that well with the observations. – This problem was fixed by Kepler, who removed the assumption of uniform motion in circles (see below) • Heliocentric model has multiple centers: Moon goes around Earth, Earth and other plan ...
CHAPTER 1
... 2. Rotation is the spinning of an object about an axis that passes through it. 3. Revolution is the orbiting of one object around another. 4. Phases of the Moon—the changing appearance of the Moon during its cycle—are caused by the relative positions of the Earth, Moon, and Sun. 5. The phases follow ...
... 2. Rotation is the spinning of an object about an axis that passes through it. 3. Revolution is the orbiting of one object around another. 4. Phases of the Moon—the changing appearance of the Moon during its cycle—are caused by the relative positions of the Earth, Moon, and Sun. 5. The phases follow ...
The Celestial Sphere
... the poles, the circles of latitude degenerate to points. The semi-great circles that run between the poles are called meridians. The meridian that runs through the Royal Greenwich Observatory outside London is called the prime meridian. The longitude of a place is determined by measuring the angula ...
... the poles, the circles of latitude degenerate to points. The semi-great circles that run between the poles are called meridians. The meridian that runs through the Royal Greenwich Observatory outside London is called the prime meridian. The longitude of a place is determined by measuring the angula ...
chapter01 - California State University, Long Beach
... 8. This is an application of Kepler's third law, P2 = a3, where a is in AU and P is in years. If P = 125 yrs, then a3 = 1252. Solving for a, we take the cube root of both sides to get a = (1252)1/3, where we have used the fact that the cube root of a number is the number to the 1/3 power. Using your ...
... 8. This is an application of Kepler's third law, P2 = a3, where a is in AU and P is in years. If P = 125 yrs, then a3 = 1252. Solving for a, we take the cube root of both sides to get a = (1252)1/3, where we have used the fact that the cube root of a number is the number to the 1/3 power. Using your ...
The New Astronomy and Cosmology of the Scientific Revolution
... speaker and writer in several languages, including Latin, Polish, German, Greek, and Italian. Most importantly for posterity, Copernicus was the astronomer credited with founding the field of modern astronomy. Copernicus’s major work, On the Revolutions of the Heavenly Spheres, was published in 1543 ...
... speaker and writer in several languages, including Latin, Polish, German, Greek, and Italian. Most importantly for posterity, Copernicus was the astronomer credited with founding the field of modern astronomy. Copernicus’s major work, On the Revolutions of the Heavenly Spheres, was published in 1543 ...
Glossary - Royal Astronomical Society of Canada
... indistinct, non-terrestrial objects visible in the night sky; “bright” nebulae glow with light emitted by the gas of which they are composed (“emission” nebulae) or by starlight reflected from dust (“reflection” nebulae) or both; “dark” nebulae consist of clouds of gas and dust that are not so illum ...
... indistinct, non-terrestrial objects visible in the night sky; “bright” nebulae glow with light emitted by the gas of which they are composed (“emission” nebulae) or by starlight reflected from dust (“reflection” nebulae) or both; “dark” nebulae consist of clouds of gas and dust that are not so illum ...
The New Astronomy and Cosmology of the Scientific Revolution
... speaker and writer in several languages, including Latin, Polish, German, Greek, and Italian. Most importantly for posterity, Copernicus was the astronomer credited with founding the field of modern astronomy. Copernicus’s major work, On the Revolutions of the Heavenly Spheres, was published in 1543 ...
... speaker and writer in several languages, including Latin, Polish, German, Greek, and Italian. Most importantly for posterity, Copernicus was the astronomer credited with founding the field of modern astronomy. Copernicus’s major work, On the Revolutions of the Heavenly Spheres, was published in 1543 ...
mean solar day
... close to one another? Are the same stars visible every night of the year? What is so special about the North Star? Are the same stars visible from any location on Earth? What causes the seasons? Why are they opposite in the northern and southern hemispheres? Has the same star always been the North S ...
... close to one another? Are the same stars visible every night of the year? What is so special about the North Star? Are the same stars visible from any location on Earth? What causes the seasons? Why are they opposite in the northern and southern hemispheres? Has the same star always been the North S ...
Chapter 1
... Copyright (c) The McGraw-Hill Companies, Inc. Permission required for reproduction or display. ...
... Copyright (c) The McGraw-Hill Companies, Inc. Permission required for reproduction or display. ...
Due: January 3, 2014 Name
... The celestial equator is the great circle on the celestial sphere that is midway between the celestial poles. The plane of the celestial equator is the same as the plane of the Earth’s equator. The north and south celestial poles are at the intersection of the celestial sphere with the extension of ...
... The celestial equator is the great circle on the celestial sphere that is midway between the celestial poles. The plane of the celestial equator is the same as the plane of the Earth’s equator. The north and south celestial poles are at the intersection of the celestial sphere with the extension of ...
The Celestial Sphere
... According to the Lakota, the Constellation of the Hand, namely the bottom half of the constellation Orion, represents the arm of a great Lakota chief. The gods wanted to punish the Lakota's chief for his selfishness and made the Thunder People rip out his arm. The chief's daughter offered to marry a ...
... According to the Lakota, the Constellation of the Hand, namely the bottom half of the constellation Orion, represents the arm of a great Lakota chief. The gods wanted to punish the Lakota's chief for his selfishness and made the Thunder People rip out his arm. The chief's daughter offered to marry a ...
PHY216_lect1_2014 - Astrophysics Research Institute
... set in the west. The hour angle tells you how long it will be before the star transits (or how much time has passed since it transited!) • Hour Angle - angle between a star's current position and the meridian (measured WESTWARD in hours, where 1 hour is equivalent to 15 degrees – because 24 hours = ...
... set in the west. The hour angle tells you how long it will be before the star transits (or how much time has passed since it transited!) • Hour Angle - angle between a star's current position and the meridian (measured WESTWARD in hours, where 1 hour is equivalent to 15 degrees – because 24 hours = ...
astr221lect2x
... • Sidereal year: Time for Earth to complete one orbit of Sun • Tropical year: Time for Earth to complete one cycle of seasons • Tropical year is about 20 ...
... • Sidereal year: Time for Earth to complete one orbit of Sun • Tropical year: Time for Earth to complete one cycle of seasons • Tropical year is about 20 ...
Study Guide for 1ST Astronomy Exam
... Describe the location of sunrise and sunset along the horizon for any given day of the year. (Figure 7.1) Describe how the maximum altitude of the Sun depends on day of the year. Fig 7.1) Explain why the solar day is different from the sidereal day. (Fig 7.2) Describe how day length varies d ...
... Describe the location of sunrise and sunset along the horizon for any given day of the year. (Figure 7.1) Describe how the maximum altitude of the Sun depends on day of the year. Fig 7.1) Explain why the solar day is different from the sidereal day. (Fig 7.2) Describe how day length varies d ...
Phys 1533 Descriptive Astronomy
... • Northern hemisphere: named after mythological heroes and animals. • Southern hemisphere: named by northern explorers when they traveled south. • There are 88 named constellations in all. ...
... • Northern hemisphere: named after mythological heroes and animals. • Southern hemisphere: named by northern explorers when they traveled south. • There are 88 named constellations in all. ...
1 - Astronomy
... symmetrical circle to model the motions of celestial objects was thought to be the most reasonable choice. 11. Any model for the planets must explain the various motions of all celestial objects, such as the Sun, Moon, and planets. A Model of Planetary Motion: Epicycles 1. Ptolemy’s geocentric model ...
... symmetrical circle to model the motions of celestial objects was thought to be the most reasonable choice. 11. Any model for the planets must explain the various motions of all celestial objects, such as the Sun, Moon, and planets. A Model of Planetary Motion: Epicycles 1. Ptolemy’s geocentric model ...
Pre SS1 Models of the Solar System - Bolinas
... force of science is not so much to confirm an explanation or theory but to find ways to tear it apart. The best way to do that is to test a theory against actual observations of the real world. If a theory or explanation does not conform with reality, it must be either modified or thrown out. Aristo ...
... force of science is not so much to confirm an explanation or theory but to find ways to tear it apart. The best way to do that is to test a theory against actual observations of the real world. If a theory or explanation does not conform with reality, it must be either modified or thrown out. Aristo ...
Naked-eye astronomy
... these groupings • Astronomers call them constellations (from the Latin for “group of stars”) ...
... these groupings • Astronomers call them constellations (from the Latin for “group of stars”) ...
Our Place in Universe
... The light-year is a measure of distance T F The number 2 x 109 is equal to to billion T F The stars in a constellation are physically close to one another T F The star Polaris always lies precisely at the north celestial pole T F Constellations are no longer used by astronomers T F The solar day is ...
... The light-year is a measure of distance T F The number 2 x 109 is equal to to billion T F The stars in a constellation are physically close to one another T F The star Polaris always lies precisely at the north celestial pole T F Constellations are no longer used by astronomers T F The solar day is ...
Celestial spheres
The celestial spheres, or celestial orbs, were the fundamental entities of the cosmological models developed by Plato, Eudoxus, Aristotle, Ptolemy, Copernicus and others. In these celestial models the apparent motions of the fixed stars and the planets are accounted for by treating them as embedded in rotating spheres made of an aetherial, transparent fifth element (quintessence), like jewels set in orbs. Since it was believed that the fixed stars did not change their positions relative to one another, it was argued that they must be on the surface of a single starry sphere.In modern thought, the orbits of the planets are viewed as the paths of those planets through mostly empty space. Ancient and medieval thinkers, however, considered the celestial orbs to be thick spheres of rarefied matter nested one within the other, each one in complete contact with the sphere above it and the sphere below. When scholars applied Ptolemy's epicycles, they presumed that each planetary sphere was exactly thick enough to accommodate them. By combining this nested sphere model with astronomical observations, scholars calculated what became generally accepted values at the time for the distances to the Sun (about 4 million miles), to the other planets, and to the edge of the universe (about 73 million miles). The nested sphere model's distances to the Sun and planets differ significantly from modern measurements of the distances, and the size of the universe is now known to be inconceivably large and possibly infinite.Albert Van Helden has suggested that from about 1250 until the 17th century, virtually all educated Europeans were familiar with the Ptolemaic model of ""nesting spheres and the cosmic dimensions derived from it"". Even following the adoption of Copernicus's heliocentric model of the universe, new versions of the celestial sphere model were introduced, with the planetary spheres following this sequence from the central Sun: Mercury, Venus, Earth-Moon, Mars, Jupiter and Saturn.