Distance - courses.psu.edu
... 4. Jupiter's moon Europa, which effectively lies at the same distance from the Sun as Jupiter (5.2 AU) receives how much sunlight per square meter, relative to the amount received by Earth? 5. a) In the distant future, the sun will likely become 100 times more luminous than at present (when it expan ...
... 4. Jupiter's moon Europa, which effectively lies at the same distance from the Sun as Jupiter (5.2 AU) receives how much sunlight per square meter, relative to the amount received by Earth? 5. a) In the distant future, the sun will likely become 100 times more luminous than at present (when it expan ...
Dust Clouds at the Center of Milky Way
... • In our Milky Way and in external galaxies, the space between the stars is filled with an interstellar medium consisting of gas and dust ...
... • In our Milky Way and in external galaxies, the space between the stars is filled with an interstellar medium consisting of gas and dust ...
Future Directions for Astronomy at MSU The lab The rest
... – Natural guide star systems are operational, but low sky coverage. – Need laser guide stars for high science productivity. MSU? ...
... – Natural guide star systems are operational, but low sky coverage. – Need laser guide stars for high science productivity. MSU? ...
Connecting Stars, Galaxies and the Universe
... white paper will force the biggest reassessment of stellar astrophysics in more than 50 years, and its effects will be very beneficial for many disciplines of astrophysics. INTRODUCTION The importance of distance determination in astrophysics is reflected by the myriad of methods available to do so: ...
... white paper will force the biggest reassessment of stellar astrophysics in more than 50 years, and its effects will be very beneficial for many disciplines of astrophysics. INTRODUCTION The importance of distance determination in astrophysics is reflected by the myriad of methods available to do so: ...
Stars
... Hubble image of the Sirius binary system, in which Sirius B can be clearly seen (lower left) ...
... Hubble image of the Sirius binary system, in which Sirius B can be clearly seen (lower left) ...
To Frame the World—19 Sept Hipparchus measures the moon’s distance~200BC
... • Parts of triangle • Angle is due to parallax: moon in foreground shifts with respect to sun in the background. • One leg of triangle is the baseline. • Other leg is distance to moon. ...
... • Parts of triangle • Angle is due to parallax: moon in foreground shifts with respect to sun in the background. • One leg of triangle is the baseline. • Other leg is distance to moon. ...
Review for Exam 2
... Define black hole, event horizon, and singularity. What is the order of main sequence stars, white dwarfs, red giants, neutron stars, and black holes in terms of surface gravity? 5) To what diameter ...
... Define black hole, event horizon, and singularity. What is the order of main sequence stars, white dwarfs, red giants, neutron stars, and black holes in terms of surface gravity? 5) To what diameter ...
Astrophysics
... • From these figures it was calculated that if the Sun was made of coal, it could burn for about 10,000 years given a lot of oxygen! As life on the Earth seemed to be millions of years old this appeared to be a problem! • Lord Kelvin and Hermann von Helmholtz suggested that the collapsing matter for ...
... • From these figures it was calculated that if the Sun was made of coal, it could burn for about 10,000 years given a lot of oxygen! As life on the Earth seemed to be millions of years old this appeared to be a problem! • Lord Kelvin and Hermann von Helmholtz suggested that the collapsing matter for ...
Properties of Stars and H
... Which Star is Brighter? • From Earth, both stars A and B seem like they have the same brightness. • Because we see this from earth, we say that the apparent magnitude is the same. • In reality, Star B is far brighter, but it is just farther away. • We would say that the actual magnitude of star B i ...
... Which Star is Brighter? • From Earth, both stars A and B seem like they have the same brightness. • Because we see this from earth, we say that the apparent magnitude is the same. • In reality, Star B is far brighter, but it is just farther away. • We would say that the actual magnitude of star B i ...
The Celestial Sphere - Department of Physics and Astronomy
... D (pc) = 1/0.001 arcsec D = 1000 pc (3260 ly) The Hubble Space Telescope can measure parallaxes to 0.0005 arcsec, or D = 2000 pc (6520 ly) ...
... D (pc) = 1/0.001 arcsec D = 1000 pc (3260 ly) The Hubble Space Telescope can measure parallaxes to 0.0005 arcsec, or D = 2000 pc (6520 ly) ...
chap7 (WP)
... discovered that the luminosity of young stars increases steadily with their temperature. Hence, the luminosity of a distant young star can be established if its surface temperature is known, for example, through the spectrum of its emitted light. Once the luminosity of the star is determined, then t ...
... discovered that the luminosity of young stars increases steadily with their temperature. Hence, the luminosity of a distant young star can be established if its surface temperature is known, for example, through the spectrum of its emitted light. Once the luminosity of the star is determined, then t ...
The Star–Gas–Star Cycle
... • Stars in disk relatively young. • fraction of heavy elements same as or greater than the Sun • plenty of high- and low-mass stars, blue and red ...
... • Stars in disk relatively young. • fraction of heavy elements same as or greater than the Sun • plenty of high- and low-mass stars, blue and red ...
Exercise 8
... How accurate were you? Is the criterion or criteria you used a good way to find galaxy distances? ...
... How accurate were you? Is the criterion or criteria you used a good way to find galaxy distances? ...
Stars are classified by their TEMPERATURE (color) SPECTRAL
... wavelengths it emits, we would expect luminosity plotted against temperature to make a straight line… There should be a one-to-one correlation between luminosity and temperature ...
... wavelengths it emits, we would expect luminosity plotted against temperature to make a straight line… There should be a one-to-one correlation between luminosity and temperature ...
Set 2
... In 1786 James Bradley, the 3rd Astronomer Royal, noticed that the apparent positions of stars on the night sky shift slightly relative to their real positions as the Earth orbits the Sun. This effect is due to the combined effect of the finite speed of light and the motion of the Earth around its or ...
... In 1786 James Bradley, the 3rd Astronomer Royal, noticed that the apparent positions of stars on the night sky shift slightly relative to their real positions as the Earth orbits the Sun. This effect is due to the combined effect of the finite speed of light and the motion of the Earth around its or ...
Chapter16
... One of the stories in astronomy teaching lore is about a university lecturer who had just finished discussing parallaxes and the distance of the stars. A student came up to him and asked “If the stars are so far away, how do we know their names?”. 2. The Distances of Stars After years of Star Trek a ...
... One of the stories in astronomy teaching lore is about a university lecturer who had just finished discussing parallaxes and the distance of the stars. A student came up to him and asked “If the stars are so far away, how do we know their names?”. 2. The Distances of Stars After years of Star Trek a ...
RFS_multiple_choice_Dec8_Key
... 2. If you look into a sky-chart, you'll probably come across several objects with funny-looking names consisting of the capital letter "M" followed by a number. For example, the Pleiades star-cluster in Taurus is labeled "M45", and "M13" is the labelling for the Hercules Globular Cluster. And so it ...
... 2. If you look into a sky-chart, you'll probably come across several objects with funny-looking names consisting of the capital letter "M" followed by a number. For example, the Pleiades star-cluster in Taurus is labeled "M45", and "M13" is the labelling for the Hercules Globular Cluster. And so it ...
QUIZ 1 - AY5-S13 . . . . . . . . . . . . . . . . . YOUR NAME
... statements as (T)rue or (F)alse: F The Sun would appear redder (compared to as seen from the Earth) during the day. T The color of the sky (looking away from the Sun during the day) would be black. F At sunset, the Sun would appear redder than it does at noon. F The “green flash” would be a “red fla ...
... statements as (T)rue or (F)alse: F The Sun would appear redder (compared to as seen from the Earth) during the day. T The color of the sky (looking away from the Sun during the day) would be black. F At sunset, the Sun would appear redder than it does at noon. F The “green flash” would be a “red fla ...
Application Exercise: Distances to Stars Using Measured Parallax
... One of the most difficult problems in astronomy is determining the distances to objects in the sky. There are four basic methods of determining distances: radar, parallax, standard candles, and the Hubble Law. Each of these methods is most useful at certain distances, with radar being useful nearby ...
... One of the most difficult problems in astronomy is determining the distances to objects in the sky. There are four basic methods of determining distances: radar, parallax, standard candles, and the Hubble Law. Each of these methods is most useful at certain distances, with radar being useful nearby ...
Poster - Arkansas Center for Space and Planetary Sciences
... other nearly edge-on from an observer’s viewpoint, the object’s variability results from the stars eclipsing each other and blocking some of the light. GX Gem belongs to a category of binary stars called close binaries since the two stars cannot be individually resolved in a telescope. By studying t ...
... other nearly edge-on from an observer’s viewpoint, the object’s variability results from the stars eclipsing each other and blocking some of the light. GX Gem belongs to a category of binary stars called close binaries since the two stars cannot be individually resolved in a telescope. By studying t ...
Proudian Senior Seminar - University of Redlands
... 1. We’ve talked about what makes a good scientific theory. What makes the Big Bang a good scientific theory? 2. Today there is increasing political/social/scientific debate between conservative Christianity and the Big Bang. If Hubble had made his discovery today, how do you think it would play out ...
... 1. We’ve talked about what makes a good scientific theory. What makes the Big Bang a good scientific theory? 2. Today there is increasing political/social/scientific debate between conservative Christianity and the Big Bang. If Hubble had made his discovery today, how do you think it would play out ...
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.