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Name: Period: Date: The Celestial Sphere What is the Celestial
Name: Period: Date: The Celestial Sphere What is the Celestial

... objects in space is shining onto it to make the patterns we see (like constellations). ...
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... ● The atmosphere regulates the earth’s temperature due to certain gasses. These gasses make sure that the worst heat during the day is kept out and the warmth is retained during the night. This is called the (natural) greenhouse effect. If it wasn’t for the greenhouse effect, the average temperature ...
Objects in the Sky Power Point
Objects in the Sky Power Point

... On the first day of January 1801, Giuseppe Piazzi discovered an object which he first thought was a new comet. But after its orbit was better determined it was clear that it was not a comet but more like a small planet. Piazzi named it Ceres, after the Sicilian goddess of grain. Three other small b ...
Chapter 24.2 The Sun and the Seasons
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...  The vernal equinox which occurs about March 21st in the northern hemisphere marks the start of spring  The autumnal equinox which occurs about September 22nd in the northern hemisphere marks the star of autumn (Noon sun is directly overhead at the equator) ...
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... degrees celcius. Sunspots are only 3800 degrees celcius; some sunspots can be very large and they can reach to 50,000 km wide in diameter. Sun spots are caused by unknown interactions with the sun’s magnetic field. ...
Science_Jeopardy_Q3 - Galena Park ISD Moodle
Science_Jeopardy_Q3 - Galena Park ISD Moodle

... This is the major reason that the Earth has a variety of different climates. ...
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Ch. 28 Sec. 1

... F is the force measured in newtons, G is the universal gravitation constant (6.6726 × 10–11 m3/ kg•s2), m1 and m2 are the masses of the bodies in kilograms, and r is the distance between the two bodies in meters. ...
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... 5. Describe the changes in the Moon phases visible from the Earth, and be able to identify them using the terms gibbous, crescent, waxing, and waning. Why do the phases change? When does a full moon rise and set? When does a new moon rise and set? 6. Draw a diagram AND explain why we have seasons. 7 ...
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The Search for Extraterrestrial Life
The Search for Extraterrestrial Life

... • The Fermi Paradox basic points are: – The sun is a young star. There are billions of stars in the galaxy that are billions of years older. – Some of these stars likely have Earth-like planets which, if the Earth is typical, may develop intelligent life. – Presumably some of these civilizations wil ...
Observing the Sky - University of Northern Iowa
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... • The Moon does not rotate because we see only one side of it. • The dark side of the Moon always faces away from the Earth. • The Moon causes seasons. • The Moon is only visible at night. • Phases are caused by the Earth’s shadow. ...
Note: Bring the solved worksheet on Sunday, 21 st February 2016
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... 16. How are the solar eclipses similar to lunar eclipses? a. They both involve the Moon b. They both cast a shadow on Earth. c. They do not involve any star 17. Which sequence is in the correct order? a. waxing crescent, first quarter, waxing gibbous, full moon b. full moon, waxing gibbous, first q ...
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... Comets are also found travelling in the solar system. They are made up of dust and ice. The sun’s heat causes the ice  to vaporize and leave a trail of visible gases. Halley’s comet orbits the sun; therefore, it has a predictable schedule  and becomes visible every 76 years.  ...
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... sun (Fig. 5–40). The inhabitants live on the inside surface (where it is always noon). Imagine that this sun is exactly like our own, that the distance to the band is the same as the Earth–Sun distance (to make the climate temperate), and that the ring rotates quickly enough to produce an apparent g ...
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astronomy review sheet2

... 19. How many degrees in its orbit does the Earth move each day? (think about what the shape of our orbit is close to and how many days are in a year) 20. Calculate the eccentricity of the ellipse below: ...
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Patterns in the Night Sky Constellation: a grouping of stars, as

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... Saturn is the second biggest planet, but it’s also the lightest planet. If there was a bathtub big enough to hold Saturn, it would float in the water! ...
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... • Galileo showed stars must be much farther than Tycho thought—in part by using his telescope to see that the Milky Way is countless individual stars.  If stars were much farther away, then lack of detectable parallax was no longer so troubling. ...
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Small Bodies in our Solar System

...  “Dirty Snowball”  These are samples (left over) from the beginning solar system formation ...
The Heliocentric Universe
The Heliocentric Universe

... C. placed the sun at the center of the solar system and could calculate planetary orbit distances for the first time. D. placed earth at the center of the solar system and was the first to postulate that planets moved in epicycles. ...
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... • The path of an object in space as it travels around another object • Planets orbit around the sun in an elliptical (flattened circle or oval) path; proposed by Johannes Kepler  Kepler’s 1st Law • Due to the gravitational attraction, a planet’s (or other object’s) speed increases as it approaches ...
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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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