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PODSTAWY FIZYKI ŚRODOWISKA
PODSTAWY FIZYKI ŚRODOWISKA

... • The parallax angle,  the distance of the object , D and the diameter of the Earth’s orbit d are connected by simple geometrical relations. For small angles, it is ...
pals_20160211_howpla.. - Department of Physics and Astronomy
pals_20160211_howpla.. - Department of Physics and Astronomy

... “Drag” from proto-planetary nebula gas? Gravitational interactions with each other? We think that Uranus & Neptune formed closer to Sun, were flung to their present orbits by interactions with Jupiter, maybe Saturn ...
Properties of Stars: The H
Properties of Stars: The H

... We can also determine the abundances of many elements in stars by using the `atomic fingerprints’ seen in spectral absorption lines. This is a tricky business! We already know that the strength and even presence of absorption lines is strongly temperature dependent. To use absorption line strengths ...
The synchronisation of cosmic cycles: a hypothesis
The synchronisation of cosmic cycles: a hypothesis

... manifestations of these interactions may include the phenomenon we have called the "synchronisation of cycles". Every object, every system of objects is in motion. Examples of this motion might be rotation of a body about its own axis or orbital revolution around a central point; the existence of a ...
8 Grade/Comp.Sci.III adv Course Code: 2002110
8 Grade/Comp.Sci.III adv Course Code: 2002110

... composition of planets Stars and Galaxies 1. Define star. 2. Describe the sizes and composition of stars 3. Define Galaxy 4. Describe the sizes and composition of galaxies Structure and Size of the Universe 1. Define universe 2. Describe the composition of the universe 3. Define light-year. 4. Descr ...
galaxies and stars - Valhalla High School
galaxies and stars - Valhalla High School

... • The coolest stars appear reddish, about 3,200 degrees Celsius • The hottest stars appear bluer than the sun, over 10,000 degrees Celsius • The sun has a surface temperature of about 5,000 degrees Celsius ...
File - Mr. Catt`s Class
File - Mr. Catt`s Class

... 3. Ancient observers wondered about these objects as we do today along with a number of even more exotic ones. 4. These are but examples through which we will study the basic methods of inquiry of not only astronomy but of all the natural sciences. 5. In our quest to understand the universe we will ...
Document
Document

... • Because they are so similar in size, Venus is sometimes called “Earth’s twin.” However, there are many differences between the two planets. ...
Objects In Space -- research questions
Objects In Space -- research questions

... 5. Can we see them from Earth? If so, what do they look like? ...
May 2015
May 2015

... Visible light is a form of electromagnetic energy that travels in waves to which our eyes are sensitive. Sunlight may look white. However, it is actually a combination of many colors which a prism can split into the spectrum of colors. This dispersion of hues can also be observed after a rain storm, ...
Chapter 13 Problems
Chapter 13 Problems

... the ring, 2.00  108 m from the center of the ring (Figure P13.53). When the object is released, the attraction of the ring makes the object move along the axis toward the center of the ring (point B). (a) Calculate the gravitational potential energy of the object-ring system when the object is at A ...
Solar System
Solar System

... the Sea. Given the beautiful blue color of this planet, the name is an excellent choice! • Pluto (Hades) is the Roman god of the underworld in Roman mythology. Perhaps the planet received this name because it's so far from the Sun that it is in perpetual darkness. Prasad ...
High School Science Essential Curriculum - Astronomy
High School Science Essential Curriculum - Astronomy

... Examine astronomical cycles in nature and apply them to the daily, monthly, and yearly cycles of Earth, such as, day-night (rotation), seasons (revolution), month (moon phase cycle), planet “wanderer” positions, and constellations. b. Discuss the contributions, in the development of various astronom ...
Chapter 4 Practice Questions
Chapter 4 Practice Questions

... a) the orbits of the planets are nearly circular, and in the same plane. b) the direction that planets orbit the Sun is opposite to the Sun’s spin. c) the terrestrial planets have higher density and lower mass. d) comets do not necessarily orbit in the plane of the solar system. ...
EEn.1.1 Explain the Earth`s role as a body in space. EEn
EEn.1.1 Explain the Earth`s role as a body in space. EEn

...     angular momentum, but Kepler did not know about this concept.  ~The third Law is a quantitative relationship between the orbital       period (time for a body to orbit Sun once) and the size of the orbit       of the body (expressed as the semimajor axis ­ a ­ of the orbit). ~ Note that these La ...
There are numerous other ways in which human civilization could
There are numerous other ways in which human civilization could

... more than about 10 million years do not exist. The exact age depends on the model used to describe their transport but relativistic limits in this argument are unlikely to change. Nothing is learned about more short lived civilizations. Other arguments that civilizations will not live that long were ...
Planetarium_Exercises - Illinois State University
Planetarium_Exercises - Illinois State University

... 4. The ecliptic is the path of the sun among the background of stars. The sun traces out the ecliptic once per _______________. 5. The sun moves along the ecliptic due to Earth’s _________________. 6. The sun moves across the sky due to Earth’s _________________. 7. Would Earth have any seasons if i ...
Your Guide to the Universe
Your Guide to the Universe

... 10% helium gas; it does not have a solid surface – thus not qualifying to be called a terrestrial planet as the first four planets are. However, in its centre these gases are compressed to a very hot liquid called metallic hydrogen. Due to its 12 year long orbit around the Sun and its fast rotation, ...
Lecture03
Lecture03

... Earth’s rotation • Responsible for our familiar calendar “day”. • Period (of rotation) = 24 hours = (24 hours)x(60 min/hr)x(60s/min) =86,400 s • Astronomers refer to this 24 hour period as a mean solar day (§2-7), implying that this time period is measured with respect to the Sun’s position on the ...
July - Magic Valley Astronomical Society
July - Magic Valley Astronomical Society

... 2.7 million miles away from the star it orbits. It is 30 times farther from the sun than is Earth. Because it orbits the sun so slowly, Neptune has not yet made a complete circle around the sun since its discovery. Neptune's orbit is at times interrupted by Pluto, whose unusual elliptical orbit peri ...
solar system-where are we? - Iowa State University Extension and
solar system-where are we? - Iowa State University Extension and

... face towards the light source. Make sure to tell your students that the light bulb is the Sun, the ball is the Moon, and they are the Earth. Have the students poke a hole at the bottom of the ball so they can stick their pencil into the ball and use it as a handle. Then have the students hold their ...
Which month has larger and smaller day time?
Which month has larger and smaller day time?

... Theory: If somebody asks you how far is your school from your home? Then, probably you will give the answer like 1 km, 5 km or could be of 10 km or so. If you have been to other city (may be at your relatives) and somebody asks you how far is the city/ town from your place? Then, the answer could be ...
Document
Document

...  A full-fledged planet is an object that orbits the sun and is large enough to have become round due to the force of its own gravity. In addition, a planet has to dominate the neighborhood around its orbit.  Pluto has been demoted to be a “Dwarf planet” (2006) because it does not dominate its neig ...
The Physics of the Sun
The Physics of the Sun

... The sun is a huge ball of hot gas subject to the action of gravitational forces that tend to make it shrink in size. This force is balanced by the pressure exerted by the gas, so that an equilibrium size prevails. The core of the sun which extends from the centre to about 20 % of the solar radius is ...
Planet Jupiter - Rocky View Schools
Planet Jupiter - Rocky View Schools

... Their alignment constantly changes on a nightly basis as the moons rapidly circle around Jupiter and dance from one side to the other in a matter of hours. Io is closest to Jupiter and is the most volcanically active body in the solar system with numerous vents ejecting molten sulphur. The thin atmo ...
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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.
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