Models of the Solar System
... is directly proportional to the cube of its semi-major axis. This law relates the amount of time for the planet to complete one orbit around the Sun to the planet’s average distance from the Sun. If we measure the orbital periods (P) in years and distances (a) in astronomical units, then the law mat ...
... is directly proportional to the cube of its semi-major axis. This law relates the amount of time for the planet to complete one orbit around the Sun to the planet’s average distance from the Sun. If we measure the orbital periods (P) in years and distances (a) in astronomical units, then the law mat ...
History Test Review Answers - School District of La Crosse
... 2. Gravitational forces depend upon the ___MASS___________and the distance between them. 3. As an object approaches the speed of light, the length of the object relative to the stationary observer will_____CONTRACT___________ 4. According to Ptolemy, planets moved about on ___EPICYCLES___________to ...
... 2. Gravitational forces depend upon the ___MASS___________and the distance between them. 3. As an object approaches the speed of light, the length of the object relative to the stationary observer will_____CONTRACT___________ 4. According to Ptolemy, planets moved about on ___EPICYCLES___________to ...
Document
... • Moves around the sun in a highly elliptical orbit • Has no moon • Almost no atmosphere—high daytime temperatures, low nighttime temperature ...
... • Moves around the sun in a highly elliptical orbit • Has no moon • Almost no atmosphere—high daytime temperatures, low nighttime temperature ...
Today`s Powerpoint - Physics and Astronomy
... Aristotle vs. Aristarchus (3rd century B.C.) Aristotle: Sun, Moon, Planets and Stars rotate around fixed Earth. Aristarchus: Used geometry of eclipses to show Sun bigger than Earth (and Moon smaller), so guessed that Earth orbits the Sun. Also guessed Earth spins on its axis once a day => apparent m ...
... Aristotle vs. Aristarchus (3rd century B.C.) Aristotle: Sun, Moon, Planets and Stars rotate around fixed Earth. Aristarchus: Used geometry of eclipses to show Sun bigger than Earth (and Moon smaller), so guessed that Earth orbits the Sun. Also guessed Earth spins on its axis once a day => apparent m ...
Solar System Vocabulary
... Why do stars that are larger and brighter than the sun not appear this way from Earth? ...
... Why do stars that are larger and brighter than the sun not appear this way from Earth? ...
class04
... “lap” another planet (or when Mercury or Venus lap us). But very difficult to explain if you think that Earth is the center of the universe! In fact, ancients considered but rejected the correct explanation… ...
... “lap” another planet (or when Mercury or Venus lap us). But very difficult to explain if you think that Earth is the center of the universe! In fact, ancients considered but rejected the correct explanation… ...
Astro 1050 HW #2
... a. Is caused by the “backward” rotation of Venus about its own axis b. Is caused by the gravitational tug of other planets on Venus c. Is caused by the change in perspective as Venus catches up with and passes Earth d. Is caused by the motion of Venus along an epicycle whose center orbits the Sun e. ...
... a. Is caused by the “backward” rotation of Venus about its own axis b. Is caused by the gravitational tug of other planets on Venus c. Is caused by the change in perspective as Venus catches up with and passes Earth d. Is caused by the motion of Venus along an epicycle whose center orbits the Sun e. ...
introduction to astronomy phys 271
... The Sky – Celestial Sphere • North and South Celestial Poles • The Celestial Equator ...
... The Sky – Celestial Sphere • North and South Celestial Poles • The Celestial Equator ...
A cyclical nature - angielski-teksty - talerz7
... Astronomy has been practiced for as long as humans have been looking at the sky and wondering what it all means... Image of the Venus and the Moon which appear close together during a conjunction. - Image: Brit Cruise The most noticable feature of our sky is the sun. Its appearance and disappearance ...
... Astronomy has been practiced for as long as humans have been looking at the sky and wondering what it all means... Image of the Venus and the Moon which appear close together during a conjunction. - Image: Brit Cruise The most noticable feature of our sky is the sun. Its appearance and disappearance ...
CopernicanRev1
... Leading up to the Copernican Revolution - More Detail ~700 BCE Early astronomy was about time keeping (when to sow and reap crops)* Needed better observations to keep the various calendars synchronized Hesiad, Works and Days …when the Pleiades rise it is time to use the sickle, but the plough when t ...
... Leading up to the Copernican Revolution - More Detail ~700 BCE Early astronomy was about time keeping (when to sow and reap crops)* Needed better observations to keep the various calendars synchronized Hesiad, Works and Days …when the Pleiades rise it is time to use the sickle, but the plough when t ...
Historical Models of the Solar System Science Fusion Lesson Gui
... 5. Geo means _______________, so in the geocentric model of the universe, _________________ is the center of the solar system and everything else ________________ around it. 6. The ___________________ model puts the sun at the center of the solar system. 7. True or False (circle) ...
... 5. Geo means _______________, so in the geocentric model of the universe, _________________ is the center of the solar system and everything else ________________ around it. 6. The ___________________ model puts the sun at the center of the solar system. 7. True or False (circle) ...
The Scientific Revolution - Online
... The Heliocentric System offers a simple explanation for varying brightness and retrograde motion ...
... The Heliocentric System offers a simple explanation for varying brightness and retrograde motion ...
PPT: The Scientific Revolution
... The Heliocentric System offers a simple explanation for varying brightness and retrograde motion ...
... The Heliocentric System offers a simple explanation for varying brightness and retrograde motion ...
History of Astronomy Notes
... Considered the greatest general authority in antiquity. Aristotle wrote about virtually everything known at his time. ...
... Considered the greatest general authority in antiquity. Aristotle wrote about virtually everything known at his time. ...
Astronomy 110 Announcements:
... The most sophisticated geocentric model was that of Ptolemy (A.D. 100-170) — the Ptolemaic model: • Sufficiently accurate to remain in use for 1,500 years. ...
... The most sophisticated geocentric model was that of Ptolemy (A.D. 100-170) — the Ptolemaic model: • Sufficiently accurate to remain in use for 1,500 years. ...
ppt
... •Uranus, Neptune: need a telescope to see them, bu they each describe westward loops once a year, each smaller than the previous planet. How can this motion be explained? ...
... •Uranus, Neptune: need a telescope to see them, bu they each describe westward loops once a year, each smaller than the previous planet. How can this motion be explained? ...
Motions of the Planets: Not the same as Stars!
... • Uranus, Neptune: need a telescope to see them, bu they each describe westward loops once a year, each smaller than the previous planet. How can this motion be explained? ...
... • Uranus, Neptune: need a telescope to see them, bu they each describe westward loops once a year, each smaller than the previous planet. How can this motion be explained? ...
Why We Have Seasons
... (combined with Earth’s revolution around the Sun) * ARNT caused by the changing distance from the Earth to the Sun that results from the shape of Earth’s orbit. – axis is tilted –revolve around the sun The Ecliptic - Straight path on the celestial sphere the sun traces - A plane (described by earths ...
... (combined with Earth’s revolution around the Sun) * ARNT caused by the changing distance from the Earth to the Sun that results from the shape of Earth’s orbit. – axis is tilted –revolve around the sun The Ecliptic - Straight path on the celestial sphere the sun traces - A plane (described by earths ...
early astronomical history
... – Ptolemy of Alexandria improved the geocentric model by assuming each planet moved on a small circle, which in turn had its center move on a much larger circle centered on the Earth – The small circles were called epicycles and were incorporated so as to explain retrograde motion – Ptolemy’s model ...
... – Ptolemy of Alexandria improved the geocentric model by assuming each planet moved on a small circle, which in turn had its center move on a much larger circle centered on the Earth – The small circles were called epicycles and were incorporated so as to explain retrograde motion – Ptolemy’s model ...
ppt document - FacStaff Home Page for CBU
... spinning since there is no great wind outside, so Earth must be stationary, so other things must be revolving around the earth (geocentric model). ** Alexander the Great lived during this time Eratosthenes: ~250 BC; used geometry and observations to determine the circumference of the spherical earth ...
... spinning since there is no great wind outside, so Earth must be stationary, so other things must be revolving around the earth (geocentric model). ** Alexander the Great lived during this time Eratosthenes: ~250 BC; used geometry and observations to determine the circumference of the spherical earth ...
Newton`s Second Law of Motion
... But if you support geocentric model, you must attribute retrograde motion to actual motions of planets, leading to loops called “epicycles”. ...
... But if you support geocentric model, you must attribute retrograde motion to actual motions of planets, leading to loops called “epicycles”. ...
A Short History of the Origin of Modern Astronomy What is a “Theory
... center of Earth (explains why planet appears to move faster through zodiac when closer to Earth equant: point offset from Earth about which a planet orbits ...
... center of Earth (explains why planet appears to move faster through zodiac when closer to Earth equant: point offset from Earth about which a planet orbits ...
Geocentric model
In astronomy, the geocentric model (also known as geocentrism, or the Ptolemaic system) is a description of the cosmos where Earth is at the orbital center of all celestial bodies. This model served as the predominant cosmological system in many ancient civilizations such as ancient Greece including the noteworthy systems of Aristotle (see Aristotelian physics) and Ptolemy. As such, they believed that the Sun, Moon, stars, and naked eye planets circled Earth.Two commonly made observations supported the idea that Earth was the center of the Universe. The stars, the sun, and planets appear to revolve around Earth each day, making Earth the center of that system. The stars were thought to be on a celestial sphere, with the earth at its center, that rotated each day, using a line through the north and south pole as an axis. The stars closest to the equator appeared to rise and fall the greatest distance, but each star circled back to its rising point each day. The second observation supporting the geocentric model was that the Earth does not seem to move from the perspective of an Earth-bound observer, and that it is solid, stable, and unmoving.Ancient Roman and medieval philosophers usually combined the geocentric model with a spherical Earth. It is not the same as the older flat Earth model implied in some mythology, as was the case with the biblical and postbiblical Latin cosmology. The ancient Jewish Babylonian uranography pictured a flat Earth with a dome-shaped rigid canopy named firmament placed over it. (רקיע- rāqîa').However, the ancient Greeks believed that the motions of the planets were circular and not elliptical, a view that was not challenged in Western culture until the 17th century through the synthesis of theories by Copernicus and Kepler.The astronomical predictions of Ptolemy's geocentric model were used to prepare astrological and astronomical charts for over 1500 years. The geocentric model held sway into the early modern age, but from the late 16th century onward was gradually superseded by the heliocentric model of Copernicus, Galileo and Kepler. There was much resistance to the transition between these two theories. Christian theologians were reluctant to reject a theory that agreed with Bible passages (e.g. ""Sun, stand you still upon Gibeon"", Joshua 10:12 – King James 2000 Bible). Others felt a new, unknown theory could not subvert an accepted consensus for geocentrism.