Astronomy
... The Sun rises exactly in the East. The Sun sets exactly in the West. The Sun is directly overhead at Noon. The Moon rises exactly in the East. The Moon sets exactly in the West. The Moon is sometimes visible in the Day.* Unlike the others (which are only true at certain times), The Moon is sometime ...
... The Sun rises exactly in the East. The Sun sets exactly in the West. The Sun is directly overhead at Noon. The Moon rises exactly in the East. The Moon sets exactly in the West. The Moon is sometimes visible in the Day.* Unlike the others (which are only true at certain times), The Moon is sometime ...
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... Since nuclear fusion in the Sun creates energy from matter, why doesn't it violate the law of conservation of energy? Conservation of energy only applies to mechanical and electrical systems, not to nuclear physics. The energy actually comes from the motion of the four separate hydrogen atoms, which ...
... Since nuclear fusion in the Sun creates energy from matter, why doesn't it violate the law of conservation of energy? Conservation of energy only applies to mechanical and electrical systems, not to nuclear physics. The energy actually comes from the motion of the four separate hydrogen atoms, which ...
Eyes to the Sky
... A pale cone of light along the ecliptic; best seen before dawn in the fall or after sunset in the spring. ...
... A pale cone of light along the ecliptic; best seen before dawn in the fall or after sunset in the spring. ...
Coordinate Systems for Astronomy or: How to get
... Our “year” is technically the Earth's “tropical period”. This is the time that elapses between two alignments of its axis of rotation with the Sun, or 365.242 days. The Earth's orbital (sidereal) period around the Sun is 365.256 days. The 0.014 day (= 20 minutes) difference is caused by precession, ...
... Our “year” is technically the Earth's “tropical period”. This is the time that elapses between two alignments of its axis of rotation with the Sun, or 365.242 days. The Earth's orbital (sidereal) period around the Sun is 365.256 days. The 0.014 day (= 20 minutes) difference is caused by precession, ...
Lighthouse in the Sky Quiz Q & A
... c. both observers measure the same altitude. d. the positions of the observers relative to the GP cannot be determined because the azimuths from each observer are not given. ...
... c. both observers measure the same altitude. d. the positions of the observers relative to the GP cannot be determined because the azimuths from each observer are not given. ...
Stars & Constellations
... However some constellations can be seen all year round. Some, like Cassiopeia are circumpolar - this means they circle above the pole, so can always been seen (the Earth’s orbit around the sun does not affect their viewing) ...
... However some constellations can be seen all year round. Some, like Cassiopeia are circumpolar - this means they circle above the pole, so can always been seen (the Earth’s orbit around the sun does not affect their viewing) ...
Apparent Magnitude
... estimate a star’s distance from Earth. • When m = M, then the star is located exactly 10 pc away • When m
... estimate a star’s distance from Earth. • When m = M, then the star is located exactly 10 pc away • When m
CH03.AST1001.F16.EDS
... Which of the following is NOT a fundamental difference between the geocentric and Sun-centered models of the solar system? A. Earth is stationary in the geocentric model but moves around the Sun in Sun-centered model. B. Retrograde motion is real (planets really go backward) in the geocentric model ...
... Which of the following is NOT a fundamental difference between the geocentric and Sun-centered models of the solar system? A. Earth is stationary in the geocentric model but moves around the Sun in Sun-centered model. B. Retrograde motion is real (planets really go backward) in the geocentric model ...
Climate Change
... Closure: Planetary Temperatures 1. What determined the temperature of your planets? 2. Did your planets come to an equilibrium temperature? What is happening at that temperature? 3. If your sun got hotter, would the temperature change? How? 4. If your planet got farther away, would the temperature ...
... Closure: Planetary Temperatures 1. What determined the temperature of your planets? 2. Did your planets come to an equilibrium temperature? What is happening at that temperature? 3. If your sun got hotter, would the temperature change? How? 4. If your planet got farther away, would the temperature ...
Chapter 3: The Science of Astronomy 3.1 The Ancient Roots of
... • The Muslim world preserved and enhanced the knowledge they received from the Greeks while Europe was in its Dark Ages. • Al-Mamun's House of Wisdom in Baghdad was a great center of learning around A.D. 800. • With the fall of Constantinople (Istanbul) in 1453, Eastern scholars headed west to Eu ...
... • The Muslim world preserved and enhanced the knowledge they received from the Greeks while Europe was in its Dark Ages. • Al-Mamun's House of Wisdom in Baghdad was a great center of learning around A.D. 800. • With the fall of Constantinople (Istanbul) in 1453, Eastern scholars headed west to Eu ...
Latitudes and Longitudes
... watch the night sky from a dark spot, you will see them easily. The most difficult one to find is the Little Dipper because the light of its stars is weaker. Start by finding the Big Dipper and Cassiopeia. Then try to find the Little Dipper by using the position of the three constellations as seen i ...
... watch the night sky from a dark spot, you will see them easily. The most difficult one to find is the Little Dipper because the light of its stars is weaker. Start by finding the Big Dipper and Cassiopeia. Then try to find the Little Dipper by using the position of the three constellations as seen i ...
Chapter 2 Measuring the Earth
... What is meant by the contour “interval” on a topographic map? a. time between two lines b. space between two lines c. vertical height between two lines d. miles between two lines The contour lines on a section of map being interpreted appear much closer together than elsewhere on the same map. The c ...
... What is meant by the contour “interval” on a topographic map? a. time between two lines b. space between two lines c. vertical height between two lines d. miles between two lines The contour lines on a section of map being interpreted appear much closer together than elsewhere on the same map. The c ...
Slide 1
... A Halo ring 10,000 miles across, 1000 miles wide, and 325 miles thick. A Ringworld 186 million miles across, 1000 miles wide, and 92 feet thick. A Dyson sphere 186 million miles across and ...
... A Halo ring 10,000 miles across, 1000 miles wide, and 325 miles thick. A Ringworld 186 million miles across, 1000 miles wide, and 92 feet thick. A Dyson sphere 186 million miles across and ...
solar system form
... Hydrogen, helium, and traces of lithium, the three lightest elements, were formed shortly after the creation of the universe. The heavier elements were produced much later by stars and are cast into space when stars die. By mass, 98% of the observed matter in the universe is hydrogen and helium. The ...
... Hydrogen, helium, and traces of lithium, the three lightest elements, were formed shortly after the creation of the universe. The heavier elements were produced much later by stars and are cast into space when stars die. By mass, 98% of the observed matter in the universe is hydrogen and helium. The ...
2.64 3.26156 8.61 pc ly × =
... Thus Polaris is about 49.6 times farther from us than Sirius. From Appendix 5 of the textbook, Sirius is 8.58 ly from Earth so Polaris is 8.58 ly X 49.6 = 425 ly away. 13.49. Proxima Centauri, the star nearest the Earth other than the Sun, has a parallax of 0.772 arcseconds. How long does it take li ...
... Thus Polaris is about 49.6 times farther from us than Sirius. From Appendix 5 of the textbook, Sirius is 8.58 ly from Earth so Polaris is 8.58 ly X 49.6 = 425 ly away. 13.49. Proxima Centauri, the star nearest the Earth other than the Sun, has a parallax of 0.772 arcseconds. How long does it take li ...
Relativity
... (100,000 mi/sec), each measuring the velocity of the same ray of light, would both find it to be moving at 300,000 km/sec (186,000 mi/sec), and this apparently anomalous result was proved by the Michelson-Morley experiment. According to classical physics, one of the two observers was at rest, and th ...
... (100,000 mi/sec), each measuring the velocity of the same ray of light, would both find it to be moving at 300,000 km/sec (186,000 mi/sec), and this apparently anomalous result was proved by the Michelson-Morley experiment. According to classical physics, one of the two observers was at rest, and th ...
CHAP
... - A light-year is the distance that light travels in _________ year which is about 9.5 million kilometers. - Light travels in space at a speed of about ____________ kilometers per second. - It takes the sun’s light __ minutes to travel from the sun to Earth. B. PARALLAX - Def. of Parallax: An appare ...
... - A light-year is the distance that light travels in _________ year which is about 9.5 million kilometers. - Light travels in space at a speed of about ____________ kilometers per second. - It takes the sun’s light __ minutes to travel from the sun to Earth. B. PARALLAX - Def. of Parallax: An appare ...
•TODAY •Chapter 5/10: The Sun Required: Sec. 1
... However, from 1645 to 1715, very few sunspots were observed. This lack of spots is called the “Maunder Minimum” On Earth, extreme cold temperatures were reported... ...
... However, from 1645 to 1715, very few sunspots were observed. This lack of spots is called the “Maunder Minimum” On Earth, extreme cold temperatures were reported... ...
summary - guideposts
... Laplace’s nebular hypothesis required a contracting nebula to leave behind rings that formed each planet, but it could not explain the sun’s low angular momentum, which was known as the angular momentum problem. The solar nebula theory proposes that the planets formed in a disk of gas and dust aroun ...
... Laplace’s nebular hypothesis required a contracting nebula to leave behind rings that formed each planet, but it could not explain the sun’s low angular momentum, which was known as the angular momentum problem. The solar nebula theory proposes that the planets formed in a disk of gas and dust aroun ...
THE SOLAR SYSTEM
... spinning at 1,600 kilometers (1,000 miles) per hour or feel it traveling around the Sun at a rate of 108,000 kilometers (67,000 miles) per hour! Q: Do all the planets rotate and revolve at the same speed? A: No. Each planet rotates on its axis at a different speed and revolves around the Sun at a di ...
... spinning at 1,600 kilometers (1,000 miles) per hour or feel it traveling around the Sun at a rate of 108,000 kilometers (67,000 miles) per hour! Q: Do all the planets rotate and revolve at the same speed? A: No. Each planet rotates on its axis at a different speed and revolves around the Sun at a di ...
Document
... The bigger the Star the smaller its lifespan • The most massive stars have the shortest lives. • Stars that are 25 to 50 times that of the Sun live for only a few million years. • Stars like our Sun live for about 10 billion years (our Sun is about half way through its life cycle!) • Stars less mas ...
... The bigger the Star the smaller its lifespan • The most massive stars have the shortest lives. • Stars that are 25 to 50 times that of the Sun live for only a few million years. • Stars like our Sun live for about 10 billion years (our Sun is about half way through its life cycle!) • Stars less mas ...
Name - crespiphysics
... actually absorb? As a result, what is the earth’s average temperature in degrees Fahrenheit (yes, I’m making you perform a conversion!)? What would the earth’s average temperature be (again in degrees Fahrenheit) if it absorbed 100% of the energy falling on it? ...
... actually absorb? As a result, what is the earth’s average temperature in degrees Fahrenheit (yes, I’m making you perform a conversion!)? What would the earth’s average temperature be (again in degrees Fahrenheit) if it absorbed 100% of the energy falling on it? ...
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.