chapter2 - Empyrean Quest Publishers
... 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 ...
... 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 ...
Integrative Studies 410 Our Place in the Universe
... – Need at least 10 sunrises or sunsets; more is better – Measure time and azimuth (angle relative to North) – Note position of sunrise/sunset on horizon – Measure angle to that position relative to some fixed ...
... – Need at least 10 sunrises or sunsets; more is better – Measure time and azimuth (angle relative to North) – Note position of sunrise/sunset on horizon – Measure angle to that position relative to some fixed ...
Scientific Revolution - Kapteyn Astronomical Institute
... corresponding to the six known planets ...
... corresponding to the six known planets ...
Session Two - A Sidewalk Astronomer in Charlottetown
... orbits around the Earth. Notice in the diagram below that the Moon is always 50% lit, but it's appearance from Earth changes as it's position changes. ...
... orbits around the Earth. Notice in the diagram below that the Moon is always 50% lit, but it's appearance from Earth changes as it's position changes. ...
Consulting the Planetary Expert: You
... The word planets comes from the Greek word for wanderer. Stars move very slowly in the sky relative to other stars but Planets change their position quite quickly relative to stars. Outer planets (Mars, Jupiter, Saturn, Uranus, Neptune) also display retrograde motion. Planets move eastward in the ni ...
... The word planets comes from the Greek word for wanderer. Stars move very slowly in the sky relative to other stars but Planets change their position quite quickly relative to stars. Outer planets (Mars, Jupiter, Saturn, Uranus, Neptune) also display retrograde motion. Planets move eastward in the ni ...
Planetarium Key Points
... Using a motionless sphere we can define a great circle, the horizon, and its poles, zenit and nadir 2. The daily motion of the sphere All the sky moves from Est to West around an axis that seems fixed on the sphere (for short periods of time as human life) The motion and the sphere define two ...
... Using a motionless sphere we can define a great circle, the horizon, and its poles, zenit and nadir 2. The daily motion of the sphere All the sky moves from Est to West around an axis that seems fixed on the sphere (for short periods of time as human life) The motion and the sphere define two ...
File
... popular name but smaller than a constellation 12. Explain precession and what it means in the future - slow movement of the axis of a spinning body around another axis due to a torque (such as gravitational influence) acting to change the direction of the first axis – it means that we will have a ne ...
... popular name but smaller than a constellation 12. Explain precession and what it means in the future - slow movement of the axis of a spinning body around another axis due to a torque (such as gravitational influence) acting to change the direction of the first axis – it means that we will have a ne ...
The Sky from Your Point of View
... • must be able to predict when an object will be up • light from Sun, Moon should not interfere ...
... • must be able to predict when an object will be up • light from Sun, Moon should not interfere ...
HISTORY OF ASTRONOMY Largely on the basis of
... for the prediction of eclipses. He also discovered and corrected another irregularity, evection, at other points of the Moon's orbit by using an epicycle on a movable eccentric deferent, whose center revolved around the Earth. When Ptolemy made a further refinement known as prosneusis, he was able t ...
... for the prediction of eclipses. He also discovered and corrected another irregularity, evection, at other points of the Moon's orbit by using an epicycle on a movable eccentric deferent, whose center revolved around the Earth. When Ptolemy made a further refinement known as prosneusis, he was able t ...
Astro history notes 1
... • The Night sky was a great glowing question… • Who are we? (no answer yet?) • Why are we here (not clear on that one either…?) • Where are we? • Humans have been working on that one for a long time! ...
... • The Night sky was a great glowing question… • Who are we? (no answer yet?) • Why are we here (not clear on that one either…?) • Where are we? • Humans have been working on that one for a long time! ...
Final Study Guide copy
... Satellites vs. Planets/Dwarf Planets – Satellites orbit other objects; planets and dwarf planets orbit the sun Meteor vs. Meteorite vs. Meteoroid – Meteoroids are rocks blying through space. They become meteors when they enter our atmosphere and burn up. If part of them survives to hit the ground or ...
... Satellites vs. Planets/Dwarf Planets – Satellites orbit other objects; planets and dwarf planets orbit the sun Meteor vs. Meteorite vs. Meteoroid – Meteoroids are rocks blying through space. They become meteors when they enter our atmosphere and burn up. If part of them survives to hit the ground or ...
Jeopardy 2015
... 100 billion stars The Milky Way Contains which of the following: 100,000 stars 100 million stars 100 Billion stars ...
... 100 billion stars The Milky Way Contains which of the following: 100,000 stars 100 million stars 100 Billion stars ...
Constellations Reading
... and the fully illustrated object or figure that represents the constellation. For example, consider the Northern Hemisphere’s winter constellation Orion the Hunter. The star pattern on which it is based — four bright stars at the corners of a trapezoid and three stars in a row near the center — does ...
... and the fully illustrated object or figure that represents the constellation. For example, consider the Northern Hemisphere’s winter constellation Orion the Hunter. The star pattern on which it is based — four bright stars at the corners of a trapezoid and three stars in a row near the center — does ...
The Copernican revolution
... 1. problem: Mars even changes directions and moves east to west relative to the stars, this is retrograde motion. One Greek philosopher, Aristarchus, proposed that it was the sun and not Earth that was at rest at the centre of the universe. He sad that the Earth and the five planets moved in circles ...
... 1. problem: Mars even changes directions and moves east to west relative to the stars, this is retrograde motion. One Greek philosopher, Aristarchus, proposed that it was the sun and not Earth that was at rest at the centre of the universe. He sad that the Earth and the five planets moved in circles ...
Astro history 1
... • With no street lights and no alarm clocks… • The Night sky was a great glowing question… • Who are we? (no answer yet?) • Why are we here (not clear on that one either…?) • Where are we? • Humans have been working on that one for a long time! ...
... • With no street lights and no alarm clocks… • The Night sky was a great glowing question… • Who are we? (no answer yet?) • Why are we here (not clear on that one either…?) • Where are we? • Humans have been working on that one for a long time! ...
Chapter 2: Emergence of Modern Astronomy
... • 2 - Use mathematics to support ideas • 3 - Reasoning must agree with observations • Use these 3 fundamentals to form a model of nature – a conceptual representation used to explain and predict an observed event. • Greeks formed many models to explain astronomy and some still exist today. ...
... • 2 - Use mathematics to support ideas • 3 - Reasoning must agree with observations • Use these 3 fundamentals to form a model of nature – a conceptual representation used to explain and predict an observed event. • Greeks formed many models to explain astronomy and some still exist today. ...
apparent retrograde motion - Indiana University Astronomy
... was motivated by inadequacy of existing predictions made very accurate observations of positions (this was prior to the development of the telescope) ...
... was motivated by inadequacy of existing predictions made very accurate observations of positions (this was prior to the development of the telescope) ...
History of astronomy
... However, in a way, Ptolemy can be considered a plagiarist. He probably did not reobserve the 1000 brightest stars visible from Alexandra. He simple took the star catalogue of Hipparchus and precessed the coordinates for precession by adding the same angular value to the celestial longitudes of thos ...
... However, in a way, Ptolemy can be considered a plagiarist. He probably did not reobserve the 1000 brightest stars visible from Alexandra. He simple took the star catalogue of Hipparchus and precessed the coordinates for precession by adding the same angular value to the celestial longitudes of thos ...
PPT: The Scientific Revolution
... of a tiny planet circling the sun, the Copernican Universe reduced the importance of humanity. It led people to begin to question the place of humanity in creation. Gave Humanity Control of Nature: Some philosophers argued that by gaining knowledge of the laws of nature, people could control nature. ...
... of a tiny planet circling the sun, the Copernican Universe reduced the importance of humanity. It led people to begin to question the place of humanity in creation. Gave Humanity Control of Nature: Some philosophers argued that by gaining knowledge of the laws of nature, people could control nature. ...
Integrative Studies 410 Our Place in the Universe
... – The year is the rotation period of the Earth around the Sun – The year is subdivided into months, the period of the Moon around the Earth – The weeks seven days are named after the seven bodies in the solar system known in ...
... – The year is the rotation period of the Earth around the Sun – The year is subdivided into months, the period of the Moon around the Earth – The weeks seven days are named after the seven bodies in the solar system known in ...
Planetarium Key Points
... Using a motionless sphere we can define a great circle, the horizon, and its poles, zenith and nadir 2. The daily motion of the sphere All the sky moves from Est to West around an axis that seems fixed on the sphere (for short periods of time as human life) The motion and the sphere define two ...
... Using a motionless sphere we can define a great circle, the horizon, and its poles, zenith and nadir 2. The daily motion of the sphere All the sky moves from Est to West around an axis that seems fixed on the sphere (for short periods of time as human life) The motion and the sphere define two ...
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.