Physical Science Lecture Notes
... A. Observing the Solar System 1. Greeks watched the stars move across the sky and noticed five “stars” that wandered around and did not follow the paths of the normal stars. They called them Wander Stars “planets”. 2. “Wandering Stars” were: Mercury, Venus, Mars, Jupiter and Saturn 3. Greek Astronom ...
... A. Observing the Solar System 1. Greeks watched the stars move across the sky and noticed five “stars” that wandered around and did not follow the paths of the normal stars. They called them Wander Stars “planets”. 2. “Wandering Stars” were: Mercury, Venus, Mars, Jupiter and Saturn 3. Greek Astronom ...
Solar System scale model
... The Solar System is often portrayed as a line of planets, closely packed to each other. But this picture is misleading! There is a lot of space in space! Astronomical distances are measured in km and in Astronomical Units (AU). 1 AU is 149,600,000km and is the same distance between the Sun and the E ...
... The Solar System is often portrayed as a line of planets, closely packed to each other. But this picture is misleading! There is a lot of space in space! Astronomical distances are measured in km and in Astronomical Units (AU). 1 AU is 149,600,000km and is the same distance between the Sun and the E ...
Scale of the Cosmos ppt.
... Astronomical Unit = AU Unit of Length Average distance between Earth and Sun Ave. 93,000,000 miles Light Year = LY The DISTANCE light travels in one year Distance = speed of light x 1 year ...
... Astronomical Unit = AU Unit of Length Average distance between Earth and Sun Ave. 93,000,000 miles Light Year = LY The DISTANCE light travels in one year Distance = speed of light x 1 year ...
The length of an Earth day is determined by the time required for
... The length of an Earth day is determined by the time required for approximately one: Sun rotation Sun revolution Earth rotation Earth revolution To an observer in Largo, MD, the North Star, Polaris, is always located above the northern horizon at an altitude of approximately: ...
... The length of an Earth day is determined by the time required for approximately one: Sun rotation Sun revolution Earth rotation Earth revolution To an observer in Largo, MD, the North Star, Polaris, is always located above the northern horizon at an altitude of approximately: ...
Name
... Describe the following astronomers’ theories: Pythagoras - ____________________________________________________________________________ Aristotle - ______________________________________________________________________________ Ptolemy - _______________________________________________________________ ...
... Describe the following astronomers’ theories: Pythagoras - ____________________________________________________________________________ Aristotle - ______________________________________________________________________________ Ptolemy - _______________________________________________________________ ...
Earth`s Shape
... • 4. As an observer on shore watches a ship sail out to sea the ship will appear to sink into the sea as it passes over the horizon. This occurs due to the ship following the curvature of the Earth. ...
... • 4. As an observer on shore watches a ship sail out to sea the ship will appear to sink into the sea as it passes over the horizon. This occurs due to the ship following the curvature of the Earth. ...
a geocentric orrery
... couple of black lights. That was most effective at night when all that could be seen were the Sun, Mercury, Venus, Earth, Mars, and stars. Against the backdrop, which acted as stars placed at infinite distance, the audience had no trouble seeing the retrograde motion of Mars (an outer planet). A col ...
... couple of black lights. That was most effective at night when all that could be seen were the Sun, Mercury, Venus, Earth, Mars, and stars. Against the backdrop, which acted as stars placed at infinite distance, the audience had no trouble seeing the retrograde motion of Mars (an outer planet). A col ...
We see apparent retrograde motion when we pass by a
... How did the Greeks explain planetary motion? Underpinnings of the Greek geocentric model: • Earth at the center of the universe • Heavens must be “perfect”: Objects moving on perfect spheres or in perfect circles. ...
... How did the Greeks explain planetary motion? Underpinnings of the Greek geocentric model: • Earth at the center of the universe • Heavens must be “perfect”: Objects moving on perfect spheres or in perfect circles. ...
Rotational Axis
... Each 4 years, one day is added to the month of February to make up for the 0.25 (1/4) rotation in each revolution around the sun. ...
... Each 4 years, one day is added to the month of February to make up for the 0.25 (1/4) rotation in each revolution around the sun. ...
I. Structure of the Earth
... Believed the suns rays hit the Earth as parallel lines Eratosthenes figured Syene was due south of Alexandria (He was slightly off on this one) Distance between Syene & Alexandria (925km) slightly off Thought both cities were on the same line of longitude (off on this by 30) ...
... Believed the suns rays hit the Earth as parallel lines Eratosthenes figured Syene was due south of Alexandria (He was slightly off on this one) Distance between Syene & Alexandria (925km) slightly off Thought both cities were on the same line of longitude (off on this by 30) ...
Coursework 1 File
... a speed equal to 99.5 % of the speed of light, leaving a twin sister at home. How old will the astronaut be upon their return to Earth as determined by an observer who remained on Earth during the voyage? How old will the twin sister be? [Hint: special relativity.] Question 2 With the aid of a diagr ...
... a speed equal to 99.5 % of the speed of light, leaving a twin sister at home. How old will the astronaut be upon their return to Earth as determined by an observer who remained on Earth during the voyage? How old will the twin sister be? [Hint: special relativity.] Question 2 With the aid of a diagr ...
Newton`s Law of Universal Gravitation
... of our galaxy, the Milky Way. The sun, mass 2.0X1030kg, revolves around the center of thee galaxy with a radius of 2.2X1020 m. The period of one rotation is 2.6X108 years. a. Find the approximate mass of the galaxy. b. Assume the average star in the galaxy has the mass of the sun, find the number of ...
... of our galaxy, the Milky Way. The sun, mass 2.0X1030kg, revolves around the center of thee galaxy with a radius of 2.2X1020 m. The period of one rotation is 2.6X108 years. a. Find the approximate mass of the galaxy. b. Assume the average star in the galaxy has the mass of the sun, find the number of ...
Planet
... two cities are not actually 27 inches apart. But we do know that the map is to scale. What this means is that we can trust that every inch shown on the map corresponds to some number of miles in real life. This is the map’s scale and is usually shown by a bar in the corner somewhere. For the map I’v ...
... two cities are not actually 27 inches apart. But we do know that the map is to scale. What this means is that we can trust that every inch shown on the map corresponds to some number of miles in real life. This is the map’s scale and is usually shown by a bar in the corner somewhere. For the map I’v ...
Perspectives of the Earth, Moon and Sun
... moving at the same speed you don’t experience the true speed. Discussion point: Why would the rotation of the Earth look like it is going in different directions, depending on what hemisphere you are in, and how does that relate to the Coriolis effect? Think about flushing toilets or any water going ...
... moving at the same speed you don’t experience the true speed. Discussion point: Why would the rotation of the Earth look like it is going in different directions, depending on what hemisphere you are in, and how does that relate to the Coriolis effect? Think about flushing toilets or any water going ...
Study Guide for Astronomy
... Eventually water vapor condensed and fell as rain. It is also possible that comets brought frozen water and added to the process. Ultraviolet light is potentially one of the pieces of the puzzle that allowed life to form on the planet. According to scientists, the first life-forms did not require ox ...
... Eventually water vapor condensed and fell as rain. It is also possible that comets brought frozen water and added to the process. Ultraviolet light is potentially one of the pieces of the puzzle that allowed life to form on the planet. According to scientists, the first life-forms did not require ox ...
Wizard Test Maker
... Which values are equal within the system? 1) The shaded sections of the diagram are equal in area. 2) The distance from the Sun to the Earth is the same at point A and at point D. 3) The orbital velocity of the Earth at point A equals its orbital velocity at point C. 4) The gravitational force betwe ...
... Which values are equal within the system? 1) The shaded sections of the diagram are equal in area. 2) The distance from the Sun to the Earth is the same at point A and at point D. 3) The orbital velocity of the Earth at point A equals its orbital velocity at point C. 4) The gravitational force betwe ...
Lecture 4
... • Near objects appear to move more than far objects • The effect is due to the change in observation point, and is used by our eyes for depth perception. Geocentric parallaxEarth as base ...
... • Near objects appear to move more than far objects • The effect is due to the change in observation point, and is used by our eyes for depth perception. Geocentric parallaxEarth as base ...
astronomy 161 - Ohio State Astronomy
... Polaris is due north, on the horizon In Earth’s Northern hemisphere: Polaris is due north - height above the horizon (in degrees) is equal to your latitude (in degrees) ...
... Polaris is due north, on the horizon In Earth’s Northern hemisphere: Polaris is due north - height above the horizon (in degrees) is equal to your latitude (in degrees) ...
Basic Observations of the Night Sky
... • In our summer, we are tilted toward the sun – as you can see in the illustration on the preceeding slide, this has the effect of making the Sun appear to rise higher in the sky and provides a longer period of daylight • In winter, we are tilted away – lower height to the Sun and shorter days ...
... • In our summer, we are tilted toward the sun – as you can see in the illustration on the preceeding slide, this has the effect of making the Sun appear to rise higher in the sky and provides a longer period of daylight • In winter, we are tilted away – lower height to the Sun and shorter days ...
Astronomy - SchoolNotes
... Innermost layer of the sun’s atmosphere Middle layer of the sun’s atmosphere ...
... Innermost layer of the sun’s atmosphere Middle layer of the sun’s atmosphere ...
PPT
... (4) The Sun appears to move west to east relative to stars (1 year cycle) Today the Sun is “in” a particular constellation, next month in a different one, etc. Sun’s path on the celestial sphere = ecliptic Constellations through which the ecliptic runs = ...
... (4) The Sun appears to move west to east relative to stars (1 year cycle) Today the Sun is “in” a particular constellation, next month in a different one, etc. Sun’s path on the celestial sphere = ecliptic Constellations through which the ecliptic runs = ...
Scale Model of the Solar System
... calculate the answer. Light travels at 300,000 km per second, and it takes light from the Sun 8 minutes to reach the Earth. 2. Before students go outside, have them draw a picture of how they think the planets in our solar system are spaced. After they finish the activity, have them draw another pic ...
... calculate the answer. Light travels at 300,000 km per second, and it takes light from the Sun 8 minutes to reach the Earth. 2. Before students go outside, have them draw a picture of how they think the planets in our solar system are spaced. After they finish the activity, have them draw another pic ...
Celestial Sphere - Otterbein University
... • One celestial object hidden by other or in the shadow of another • Solar eclipse: sun hidden by the moon • Lunar eclipse: moon in earth’s shadow (sun hidden from moon by earth) • Also: eclipses of Jupiter’s moons, etc. • Most spectacular because moon and sun appear to be the same size from earth ...
... • One celestial object hidden by other or in the shadow of another • Solar eclipse: sun hidden by the moon • Lunar eclipse: moon in earth’s shadow (sun hidden from moon by earth) • Also: eclipses of Jupiter’s moons, etc. • Most spectacular because moon and sun appear to be the same size from earth ...
Orbits - Sunny Okanagan
... earth, the sun must move up or down to keep in the same season. • If the sun moves back half an orbit later, earth can flow out of the reverse orbit. • This because earth’s orbit must shift back by the same amount to keep in the same season. • Thus earth’s axis would always point to the pole star, n ...
... earth, the sun must move up or down to keep in the same season. • If the sun moves back half an orbit later, earth can flow out of the reverse orbit. • This because earth’s orbit must shift back by the same amount to keep in the same season. • Thus earth’s axis would always point to the pole star, n ...
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.