The History of Astronomy
... • An 8 arc-minute discrepancy (about 13% of one degree) led him eventually to ellipses. • Developed 3 “laws” of orbits ...
... • An 8 arc-minute discrepancy (about 13% of one degree) led him eventually to ellipses. • Developed 3 “laws” of orbits ...
(AU): Average distance from Earth to Sun
... Questions 1. What are the 2 major pieces of evidence to support the Big Bang Theory? 2. If spectral lines are red-shifted, is the object moving toward or away from Earth? ...
... Questions 1. What are the 2 major pieces of evidence to support the Big Bang Theory? 2. If spectral lines are red-shifted, is the object moving toward or away from Earth? ...
Trivia Question of the Day
... - Sun directly over Tropic of Capricorn (23.5°S) Equal (12) hours of day and night - Sun directly over Equator (0°) ...
... - Sun directly over Tropic of Capricorn (23.5°S) Equal (12) hours of day and night - Sun directly over Equator (0°) ...
Black Holes, Part 3, Dark Energy
... One of the measured evidence is, that the Sun's mass density is a thousand times too low for the Sun to be a hydrogen gas sphere. Just look at the comparison. In comparing Saturn with Jupiter, Jupiter that has nearly twice the volume, has also nearly twice the mass density. In comparison with Jupit ...
... One of the measured evidence is, that the Sun's mass density is a thousand times too low for the Sun to be a hydrogen gas sphere. Just look at the comparison. In comparing Saturn with Jupiter, Jupiter that has nearly twice the volume, has also nearly twice the mass density. In comparison with Jupit ...
Equivalent Widths and Chemical abundances Equivalent
... 5) Also note the relative peak of the “iron peak” elements, Fe and Ni. 6) Note that Iron-56 represents the most stable atom in the sense of the greatest binding energy per nucleon, so it is the dividing point between where nuclear reactions yield energy by fusion and where they yield them by fission ...
... 5) Also note the relative peak of the “iron peak” elements, Fe and Ni. 6) Note that Iron-56 represents the most stable atom in the sense of the greatest binding energy per nucleon, so it is the dividing point between where nuclear reactions yield energy by fusion and where they yield them by fission ...
NATS1311_091108_bw - The University of Texas at Dallas
... Temps Atomique International (TAI) or International Atomic Time weighted average of the time kept by about 200 cesium atomic clocks in over 50 national laboratories worldwide - available since 1955 UT1 - timescale defined by the Earth's rotation - computed by the International Earth Rotation and Ref ...
... Temps Atomique International (TAI) or International Atomic Time weighted average of the time kept by about 200 cesium atomic clocks in over 50 national laboratories worldwide - available since 1955 UT1 - timescale defined by the Earth's rotation - computed by the International Earth Rotation and Ref ...
Phys133 SAMPLE questions for MidTerm#1
... B) It is the star straight overhead. C) It appears very near the north celestial pole. D) It can be used to determine your longitude on Earth. E) It is the star directly on your northern horizon. ...
... B) It is the star straight overhead. C) It appears very near the north celestial pole. D) It can be used to determine your longitude on Earth. E) It is the star directly on your northern horizon. ...
Ptolemy vs. Copernicus
... The path that the sun takes through the zodiac is called the ecliptic. Imagine a map of the entire sky, much like a map of the world, only it shows the stars and constellations. Figure 1 is such a map (without the stars plotted). Here the ecliptic is the sinusoidal curve. (The signs of the zodiac ar ...
... The path that the sun takes through the zodiac is called the ecliptic. Imagine a map of the entire sky, much like a map of the world, only it shows the stars and constellations. Figure 1 is such a map (without the stars plotted). Here the ecliptic is the sinusoidal curve. (The signs of the zodiac ar ...
Slide 1
... To make this text bigger hold down the Ctrl key and turn the wheel on your mouse away from you at the same time. To me the solar system unit is the toughest unit to teach all year. Not because it is not interesting, not because I don’t understand the material, and certainly not because the kids don’ ...
... To make this text bigger hold down the Ctrl key and turn the wheel on your mouse away from you at the same time. To me the solar system unit is the toughest unit to teach all year. Not because it is not interesting, not because I don’t understand the material, and certainly not because the kids don’ ...
Lecture 3a
... • Very strong proponent of the scientific method – use of observations to test theories. • Early work was on motion, and practical elements like hydrostatics • In 1609 was the first one to use a telescope for astronomy => became the most famous scientist/celebrity in Europe • Last 30 years of hi ...
... • Very strong proponent of the scientific method – use of observations to test theories. • Early work was on motion, and practical elements like hydrostatics • In 1609 was the first one to use a telescope for astronomy => became the most famous scientist/celebrity in Europe • Last 30 years of hi ...
a2Lec115
... Units of Distance: Use mks system: length=meter, mass =kgm, time=sec Astronomical Unit (AU): Distance from the earth to the sun = semi-major axis of the orbit of Earth around Sun 1 AU = d(sun) = 1.5 x 1011 m Parsec (PC): Distance at which 1 AU subtends Angle of 1 second 1 pc (parsec) = 206625 AU = ...
... Units of Distance: Use mks system: length=meter, mass =kgm, time=sec Astronomical Unit (AU): Distance from the earth to the sun = semi-major axis of the orbit of Earth around Sun 1 AU = d(sun) = 1.5 x 1011 m Parsec (PC): Distance at which 1 AU subtends Angle of 1 second 1 pc (parsec) = 206625 AU = ...
Coordinate Systems for Astronomy or: How to get
... The world is divided into Time Zones; 15 degrees change in longitude is equivalent to an hour's change in time. South Africa is roughly 30 degrees east of Greenwich, and so South African Standard Time (SAST) is set to be 2 hours ahead of UTC. Our “year” is technically the Earth's “tropical period”. ...
... The world is divided into Time Zones; 15 degrees change in longitude is equivalent to an hour's change in time. South Africa is roughly 30 degrees east of Greenwich, and so South African Standard Time (SAST) is set to be 2 hours ahead of UTC. Our “year” is technically the Earth's “tropical period”. ...
ExoplanetWorksheet
... Does it look like we’ve found very many or very few rocky exoplanets? __________________________________ * White dwarf stars have a mass that is comparable to the Sun, but are about 100 times smaller. Have we found any planets around white dwarf stars? __________________________________ * There is a ...
... Does it look like we’ve found very many or very few rocky exoplanets? __________________________________ * White dwarf stars have a mass that is comparable to the Sun, but are about 100 times smaller. Have we found any planets around white dwarf stars? __________________________________ * There is a ...
SAP_Paper1_FutureOfUniverse
... growing at the rate that it currently is then the molten outer core will freeze. The implication of this is that earth will lose its protective magnetic field and the ozone layer will be buffeted away by solar radiation (Waszek, Lauren; Irving, Jessica; Deuss, Arwen). And it is predicted that the wa ...
... growing at the rate that it currently is then the molten outer core will freeze. The implication of this is that earth will lose its protective magnetic field and the ozone layer will be buffeted away by solar radiation (Waszek, Lauren; Irving, Jessica; Deuss, Arwen). And it is predicted that the wa ...
How does the earth orbit the sun?
... 25. Gravity keeps the ____________________ moving around the earth. It also keeps the planets moving around the _______________________. In the spaces provided write “True” if the sentence is true. Write “False” if the sentence is false. 26. _________ The planets move in circular orbits around the s ...
... 25. Gravity keeps the ____________________ moving around the earth. It also keeps the planets moving around the _______________________. In the spaces provided write “True” if the sentence is true. Write “False” if the sentence is false. 26. _________ The planets move in circular orbits around the s ...
Astronomy
... these spots moving, so he realized that the Sun must be rotating. He thought that if the Sun was moving, we probably were rotating on an axis. • Galileo observed 4 points of light that changed their positions with time around the planet Jupiter. He concluded that these were objects in orbit around J ...
... these spots moving, so he realized that the Sun must be rotating. He thought that if the Sun was moving, we probably were rotating on an axis. • Galileo observed 4 points of light that changed their positions with time around the planet Jupiter. He concluded that these were objects in orbit around J ...
Name: Date:
... 5. If a star’s spectrum is shifted toward the blue end of the spectrum, (blue shift) which way are the stars moving? ______________________________________________ _________________________________________________________________________ 6. If a star’s spectrum is shifted toward the red end of the s ...
... 5. If a star’s spectrum is shifted toward the blue end of the spectrum, (blue shift) which way are the stars moving? ______________________________________________ _________________________________________________________________________ 6. If a star’s spectrum is shifted toward the red end of the s ...
CHAPTER 6 THE CELESTIAL SPHERE
... (The reader may have noticed that I have just used the term “sidereal hours”. For the moment, just read this as “hours” – but a little later on we shall say what we mean by “sidereal” hours, and you may then want to come back and re-read this.) While it is useful to know the hour angle of a star at ...
... (The reader may have noticed that I have just used the term “sidereal hours”. For the moment, just read this as “hours” – but a little later on we shall say what we mean by “sidereal” hours, and you may then want to come back and re-read this.) While it is useful to know the hour angle of a star at ...
GSC 1580 Vocabulary/Who`s Who
... proposed the heliocentric system, that the stars are stationary, and that heavenly bodies move in perfect circles and at constant speeds. Coriolis force: an apparent force that as a result of the Earth's rotation deflects moving objects (as projectiles or air currents) to the right in the northern h ...
... proposed the heliocentric system, that the stars are stationary, and that heavenly bodies move in perfect circles and at constant speeds. Coriolis force: an apparent force that as a result of the Earth's rotation deflects moving objects (as projectiles or air currents) to the right in the northern h ...
Starlight and What it Tells Us
... The Heavens Are Not Changeless • The Stars Move – Most of our constellations would have been unrecognizable to Neanderthal Man ...
... The Heavens Are Not Changeless • The Stars Move – Most of our constellations would have been unrecognizable to Neanderthal Man ...
but restricted to nearby large stars
... If the stress on the tubes reaches a certain limit, they curl up like a rubber band and puncture the sun's surface. Convection is inhibited at the puncture points; the energy flux from the sun's interior decreases; and with it surface temperature. ...
... If the stress on the tubes reaches a certain limit, they curl up like a rubber band and puncture the sun's surface. Convection is inhibited at the puncture points; the energy flux from the sun's interior decreases; and with it surface temperature. ...
Date - Penn Physics
... The other online materials and materials from the SkyGazer CD Rom are optional. (The recommended SkyGazer items are listed in the expanded syllabus available on the Blackboard course website at courseweb.library.upenn.edu) ...
... The other online materials and materials from the SkyGazer CD Rom are optional. (The recommended SkyGazer items are listed in the expanded syllabus available on the Blackboard course website at courseweb.library.upenn.edu) ...