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Unit 3 - Section 9.1 2011 Distances in Space0
... 2. The length of AB is less than r. This means that the angle between AC and AB is small. This is the parallax of C as viewed from AB 3. We do not require great accuracy (i.e., within 1% of the approximate distance). Return to the diagram above The diameter of the Earth’s orbit around the Sun is 3 ...
... 2. The length of AB is less than r. This means that the angle between AC and AB is small. This is the parallax of C as viewed from AB 3. We do not require great accuracy (i.e., within 1% of the approximate distance). Return to the diagram above The diameter of the Earth’s orbit around the Sun is 3 ...
Explainer: Light-years and units for the stars
... professionally, and is celebrating its 100th birthday Southern Cross, is over four light-years away. That this year. The light-year has long been used by means we are viewing Alpha Centauri as it was astronomers when they are trying to communicate four years ago. to a broad audience, perhaps with m ...
... professionally, and is celebrating its 100th birthday Southern Cross, is over four light-years away. That this year. The light-year has long been used by means we are viewing Alpha Centauri as it was astronomers when they are trying to communicate four years ago. to a broad audience, perhaps with m ...
Microsoft Word Document
... dense that a teaspoon of their material would weigh ______ million tons! ...
... dense that a teaspoon of their material would weigh ______ million tons! ...
stars concept review
... Name ______________________________ Class ___________________ Date __________________ ...
... Name ______________________________ Class ___________________ Date __________________ ...
INDIRECT METHODS FOR MEASUREMENT OF DISTANCE
... more alcohol is added to increase the volume to 30 c.c. The final solution is 1/30 c.c. of oleic acid in 30 c.c. solution and its concentration is 1/900 c.c. of oleic acid in 1 c.c solution. Put n drops of this solution carefully on the surface of water in the vessel. Stretch out this film on the su ...
... more alcohol is added to increase the volume to 30 c.c. The final solution is 1/30 c.c. of oleic acid in 30 c.c. solution and its concentration is 1/900 c.c. of oleic acid in 1 c.c solution. Put n drops of this solution carefully on the surface of water in the vessel. Stretch out this film on the su ...
NS2-M3C17_-_The_Stars_Exam
... Outside of the Milky Way, in the Magellanic Cloud. In regions where there is little dust and gas. In the spiral arms of the Milky Way galaxy. In regions where there is a great deal of dust and gas. ...
... Outside of the Milky Way, in the Magellanic Cloud. In regions where there is little dust and gas. In the spiral arms of the Milky Way galaxy. In regions where there is a great deal of dust and gas. ...
Unit 1
... • Stars in the Milky Way are very far apart – Nearest star is 40 trillion km away – too large to imagine! – How about hundreds of thousands of AU? No, still too big. – Light travels 10 trillion km in one year, so we’ll use the light year (ly) as an easy-to-imagine measure of distance – It takes ligh ...
... • Stars in the Milky Way are very far apart – Nearest star is 40 trillion km away – too large to imagine! – How about hundreds of thousands of AU? No, still too big. – Light travels 10 trillion km in one year, so we’ll use the light year (ly) as an easy-to-imagine measure of distance – It takes ligh ...
C:\Documents and Settings\Administrator\Desktop\Lecture 15.wpd
... The Central Problem in astronomy is distance. What we see is basically a twodimensional picture of the sky. To interpret many pieces of information available to the astronomer we need to know how far away a star or galaxy is. Example: If you look at the sky, Sirius is brighter than Betelgeuse. But B ...
... The Central Problem in astronomy is distance. What we see is basically a twodimensional picture of the sky. To interpret many pieces of information available to the astronomer we need to know how far away a star or galaxy is. Example: If you look at the sky, Sirius is brighter than Betelgeuse. But B ...
d = 1 / p
... relative to other stars. The further away a star is, the smaller its shift in position – a relationship that can be easily determined by trigonometry: Earth in July Parallax: angle shift relative to very faraway background stars p ...
... relative to other stars. The further away a star is, the smaller its shift in position – a relationship that can be easily determined by trigonometry: Earth in July Parallax: angle shift relative to very faraway background stars p ...
d = 1 / p
... relative to other stars. The further away a star is, the smaller its shift in position – a relationship that can be easily determined by trigonometry: Earth in July Parallax: angle shift relative to very faraway background stars p ...
... relative to other stars. The further away a star is, the smaller its shift in position – a relationship that can be easily determined by trigonometry: Earth in July Parallax: angle shift relative to very faraway background stars p ...
Measuring the Masses of Galaxies in the Sloan Digital Sky Survey
... The redshift z is an observed property of a galaxy (or quasar). It tells us the relative size of the Universe now with respect to the size of the Universe when light left the galaxy (or quasar). (1 + z) = (size now) / (size then) ...
... The redshift z is an observed property of a galaxy (or quasar). It tells us the relative size of the Universe now with respect to the size of the Universe when light left the galaxy (or quasar). (1 + z) = (size now) / (size then) ...
Another Old Final
... (b) Estimate the distance to this supernova and the lookback time (how long ago we are observing it). (c) Type-Ia supernovae reach peak luminosities of 109 L . Estimate the peak apparent brightness of this supernova. Would it have been visible to the naked eye on a clear night? ...
... (b) Estimate the distance to this supernova and the lookback time (how long ago we are observing it). (c) Type-Ia supernovae reach peak luminosities of 109 L . Estimate the peak apparent brightness of this supernova. Would it have been visible to the naked eye on a clear night? ...
Lecture - UMass Amherst
... New Year's Eve. All of human history is but a fleeting instant on the cosmic timescale. ...
... New Year's Eve. All of human history is but a fleeting instant on the cosmic timescale. ...
chapter 17 measuring the stars
... (including the Sun itself) ~The color of any 24, 000 K object glows white o White Dwarf: A dwarf star with sufficiently high surface temperature that it glows white ...
... (including the Sun itself) ~The color of any 24, 000 K object glows white o White Dwarf: A dwarf star with sufficiently high surface temperature that it glows white ...
P10263v1.2 Lab 6 Text
... absolute luminosity. Combined with the measured apparent luminosity and an estimate of “X”, we were able to find the distance to that cluster. Finding the distance to other galaxies, however, can be a bit more difficult. Whereas the Pleiades cluster is about 120 parsecs away, the Small Magellanic Cl ...
... absolute luminosity. Combined with the measured apparent luminosity and an estimate of “X”, we were able to find the distance to that cluster. Finding the distance to other galaxies, however, can be a bit more difficult. Whereas the Pleiades cluster is about 120 parsecs away, the Small Magellanic Cl ...
Some Important Introductory Concepts
... Kepler’s 3rd law, as modified by Newton (coming up), will be a cornerstone of much of this course, because it allows us to estimate masses of astronomical objects (e.g. masses of stars, galaxies, the existence of black holes and the mysterious “dark matter”). Example of use of Kepler’s 3rd law: Th ...
... Kepler’s 3rd law, as modified by Newton (coming up), will be a cornerstone of much of this course, because it allows us to estimate masses of astronomical objects (e.g. masses of stars, galaxies, the existence of black holes and the mysterious “dark matter”). Example of use of Kepler’s 3rd law: Th ...
Lecture 5: Light as a tool
... Apparent magnitude tells us nothing about the luminosity of the objects, but it tell us how difficult it is to see the objects in the sky. Absolute magnitude, on the other hand, is directly related to the luminosity of the object. But it does not tell us how bright they appear in the sky. ...
... Apparent magnitude tells us nothing about the luminosity of the objects, but it tell us how difficult it is to see the objects in the sky. Absolute magnitude, on the other hand, is directly related to the luminosity of the object. But it does not tell us how bright they appear in the sky. ...
Measuring the Distances to the Stars: Parallax What sets the parallax limit? 1
... • discovered in Magellanic Clouds • calibrated locally, using (statistical) parallaxes ...
... • discovered in Magellanic Clouds • calibrated locally, using (statistical) parallaxes ...
Distance Between Stars - cK-12
... than a few hundred light years away. For these more distant stars, astronomers must use more indirect methods of determining distance. Most of these methods involve determining how bright the star they are looking at really is. For example, if the star has properties similar to the Sun, then it shou ...
... than a few hundred light years away. For these more distant stars, astronomers must use more indirect methods of determining distance. Most of these methods involve determining how bright the star they are looking at really is. For example, if the star has properties similar to the Sun, then it shou ...
Earth Science
... Apparent change in position of an object resulting from a change in the angle or in the position from which it is ...
... Apparent change in position of an object resulting from a change in the angle or in the position from which it is ...
Size scales in the solar system - University of Iowa Astrophysics
... dominant object in the solar system Another way of expressing distances in the solar system ...
... dominant object in the solar system Another way of expressing distances in the solar system ...
Lecture 3 -- Astronomical Coordinate Systems
... The fastest anything can travel is speed of light = c = 2.9979E+08 meters/sec Distance to Sun = 1 au = 1.496E+11 meters (see Appendix 1), so light travel time from Sun is t=d/c =1.496E+11/2.9979E+08 = t=499.02 sec ...
... The fastest anything can travel is speed of light = c = 2.9979E+08 meters/sec Distance to Sun = 1 au = 1.496E+11 meters (see Appendix 1), so light travel time from Sun is t=d/c =1.496E+11/2.9979E+08 = t=499.02 sec ...
Apparent brightness
... Distinguish between luminosity and brightness and explain how stellar luminosity is determined. Explain how stars are classified according to their colors, surface temperatures and spectral characteristics, and tell why such a classification is useful. State how an H-R diagram is constructed, ...
... Distinguish between luminosity and brightness and explain how stellar luminosity is determined. Explain how stars are classified according to their colors, surface temperatures and spectral characteristics, and tell why such a classification is useful. State how an H-R diagram is constructed, ...
Galaxies - Where Science Meets Life
... brightness of stars on a graph. Two years later, an American astronomer named Henry Norris Russell created similar graphs. Their research was combined to form what is now called the Hertzsprung-Russell diagram, or HR diagram. ...
... brightness of stars on a graph. Two years later, an American astronomer named Henry Norris Russell created similar graphs. Their research was combined to form what is now called the Hertzsprung-Russell diagram, or HR diagram. ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.