Astronomy Assignment #10 Solutions
... Earth to move halfway around its orbit to take the two necessary pictures of the star to measure parallax, so you have to wait six months between observations. 6. If you can measure angles as small as 1/50 arc second, how far out can you measure star distances from Jupiter (Jupiter-Sun distance = 5. ...
... Earth to move halfway around its orbit to take the two necessary pictures of the star to measure parallax, so you have to wait six months between observations. 6. If you can measure angles as small as 1/50 arc second, how far out can you measure star distances from Jupiter (Jupiter-Sun distance = 5. ...
Lecture 11
... accuracy of 24 microarcseconds for stars to V = 15 and to 0.5 milliarcsec for stars to V = 20; • perform spectral and photometric measurements of these objects; • derive space velocities of the Galaxy's constituent stars using the stellar distances and motions; • create a three-dimensional structura ...
... accuracy of 24 microarcseconds for stars to V = 15 and to 0.5 milliarcsec for stars to V = 20; • perform spectral and photometric measurements of these objects; • derive space velocities of the Galaxy's constituent stars using the stellar distances and motions; • create a three-dimensional structura ...
AST 101 INTRODUCTION TO ASTRONOMY SPRING 2008
... Hardly ever occur; like stars, galaxies are too far apart, compared to their sizes. Cause large numbers of stars to collide and explode. Cause both galaxies to collapse into a supermassive black hole. Turn ellipticals into spirals. Cause bursts of star formation. ...
... Hardly ever occur; like stars, galaxies are too far apart, compared to their sizes. Cause large numbers of stars to collide and explode. Cause both galaxies to collapse into a supermassive black hole. Turn ellipticals into spirals. Cause bursts of star formation. ...
Version0 Answers
... B. Like open clusters, Globular Clusters are found only in the Galaxy’s disk C. Globular clusters were once thought to be older than the age of the Universe D. The color magnitude diagram of a Globular Cluster will show it has lost a large fraction of its main sequence stars E. Globular clusters can ...
... B. Like open clusters, Globular Clusters are found only in the Galaxy’s disk C. Globular clusters were once thought to be older than the age of the Universe D. The color magnitude diagram of a Globular Cluster will show it has lost a large fraction of its main sequence stars E. Globular clusters can ...
Friday, January 27, 2017 First exam a week from today. Review
... In exploding white dwarfs (arising in stars with mass less than about 8 times the Sun), the core is composed of Carbon and Oxygen, and the explosion creates the intermediate-mass elements, Magnesium, Silicon, Calcium, and also Iron. (between about 8 and about 12 solar masses, different story, maybe ...
... In exploding white dwarfs (arising in stars with mass less than about 8 times the Sun), the core is composed of Carbon and Oxygen, and the explosion creates the intermediate-mass elements, Magnesium, Silicon, Calcium, and also Iron. (between about 8 and about 12 solar masses, different story, maybe ...
Measuring the Stars pages 813-820
... Because of parallax, it seems that the star moved, when compared to far away stars, but it did not actually do so. The smaller the parallax, the farther away the star is. ...
... Because of parallax, it seems that the star moved, when compared to far away stars, but it did not actually do so. The smaller the parallax, the farther away the star is. ...
April
... M65 is a spiral galaxy in the constellation Leo (LEE-oh). Seen nearly edge-on, it displays a bright central core and a faint oval corona that offers a hint of spiral arms. First listed by Charles Messier in 1780, M65 forms a fairly close grouping with M66 and NGC 3628, described below. M66 is anoth ...
... M65 is a spiral galaxy in the constellation Leo (LEE-oh). Seen nearly edge-on, it displays a bright central core and a faint oval corona that offers a hint of spiral arms. First listed by Charles Messier in 1780, M65 forms a fairly close grouping with M66 and NGC 3628, described below. M66 is anoth ...
SOLUTIONS TO PROBLEM SET # 3
... would be within a Hubble distance of us? Dividing this number of atoms by the volume of space within a Hubble distance of us, show how many hydrogen atoms there would be, on average, per cubic meter of the visible universe. The number of stars within a Hubble distance of us is Nstar = 3.33 × 1022 . ...
... would be within a Hubble distance of us? Dividing this number of atoms by the volume of space within a Hubble distance of us, show how many hydrogen atoms there would be, on average, per cubic meter of the visible universe. The number of stars within a Hubble distance of us is Nstar = 3.33 × 1022 . ...
Hubble Redshift
... attention to Cepheid Variable stars within galaxies. These stars pulsate in a characteristic fashion, which depends upon their absolute magnitude. The apparent magnitude of those stars can be measured directly. The difference between the absolute and apparent magnitude provides a method of determini ...
... attention to Cepheid Variable stars within galaxies. These stars pulsate in a characteristic fashion, which depends upon their absolute magnitude. The apparent magnitude of those stars can be measured directly. The difference between the absolute and apparent magnitude provides a method of determini ...
The Fates of Stars Mass-Luminosity Relation: Lifetime Relation:
... The Fates of Stars Two simple relations are of extreme importance in stellar evolution. Mass-Luminosity Relation: Lifetime Relation: ...
... The Fates of Stars Two simple relations are of extreme importance in stellar evolution. Mass-Luminosity Relation: Lifetime Relation: ...
source
... The Fates of Stars Two simple relations are of extreme importance in stellar evolution. Mass-Luminosity Relation: Lifetime Relation: ...
... The Fates of Stars Two simple relations are of extreme importance in stellar evolution. Mass-Luminosity Relation: Lifetime Relation: ...
HW6 due - Yale Astronomy
... The sun will collide with another star of the same size (radius = 1 Rsun) if it comes within a distance of 2Rsun of that star. (Their edges will just touch if they come within a distance ...
... The sun will collide with another star of the same size (radius = 1 Rsun) if it comes within a distance of 2Rsun of that star. (Their edges will just touch if they come within a distance ...
solar system formation and gal
... • Over time it flattens into a disc-like shape while spinning in one direction • Astronomers theorize that any planets forming during this phase would form in the same flat plane and would rotate and revolve around the star in the same way • Using technology, astronomers have discovered flattening n ...
... • Over time it flattens into a disc-like shape while spinning in one direction • Astronomers theorize that any planets forming during this phase would form in the same flat plane and would rotate and revolve around the star in the same way • Using technology, astronomers have discovered flattening n ...
Astrophysics
... star -- so if it looks dim it must be a very long way away A red star is not as bright, so if it looks bright it must be relatively close. For example: Sirius and Alpha Centauri are similar in apparent brightness but Sirius is bluish while A.Cent. is yellowish ...
... star -- so if it looks dim it must be a very long way away A red star is not as bright, so if it looks bright it must be relatively close. For example: Sirius and Alpha Centauri are similar in apparent brightness but Sirius is bluish while A.Cent. is yellowish ...
THE 3-D UNIVERSE CONCEPTS
... brightness, their distance can be estimated even when they are in galaxies or star clusters that are extremely far away. Another example of standard candles are Cepheid variable stars. The brightness of these stars varies over a regular cycle. Astronomers have found that the time it takes a Cepheid ...
... brightness, their distance can be estimated even when they are in galaxies or star clusters that are extremely far away. Another example of standard candles are Cepheid variable stars. The brightness of these stars varies over a regular cycle. Astronomers have found that the time it takes a Cepheid ...
Wednesday, October 29 - Otterbein University
... WUP: What is the Blackbody Curve and how does it depend on temperature? • jj: The blackbody curve describes the distribution of reemitted radiation from a blackbody (an object that absorbs and reemits all radiation falling upon it. The peak of the frequency on a blackbody curve is directly proporti ...
... WUP: What is the Blackbody Curve and how does it depend on temperature? • jj: The blackbody curve describes the distribution of reemitted radiation from a blackbody (an object that absorbs and reemits all radiation falling upon it. The peak of the frequency on a blackbody curve is directly proporti ...
0708 - Astronomy
... What does it mean that distance and velocity are proportional? balloon is stretched (multiplicatively) by some factor we need to think of the Universe the same way Can we trace the expansion back to the point where it began? that “point” is now the whole balloon/whole Universe... so no. ...
... What does it mean that distance and velocity are proportional? balloon is stretched (multiplicatively) by some factor we need to think of the Universe the same way Can we trace the expansion back to the point where it began? that “point” is now the whole balloon/whole Universe... so no. ...
obafgkm - Piscataway High School
... Astronomers cannot physically measure properties of stars. They rely on interpreting data that can be gathered from the earth. Determine what information about stars can be revealed using the following methods: Parallax effect ...
... Astronomers cannot physically measure properties of stars. They rely on interpreting data that can be gathered from the earth. Determine what information about stars can be revealed using the following methods: Parallax effect ...
Variables, Star Clusters, and Nebulae (Professor Powerpoint)
... is scattered more by dust than longer wavelength red light. This interstellar reddening is different from reddening due to the doppler shift. Doppler shift causes all wavelengths to lengthen equally, while interstellar reddening does not change the wavelength of the star light, only their intensity. ...
... is scattered more by dust than longer wavelength red light. This interstellar reddening is different from reddening due to the doppler shift. Doppler shift causes all wavelengths to lengthen equally, while interstellar reddening does not change the wavelength of the star light, only their intensity. ...
Orion
... Why does Mintaka appear so dim given that it is very luminous? Which stars are main sequence stars? Rigel is a true supergiant, blazing white-hot star of intense brilliance and dazzling beauty. Its surface temperature is about 12,000 K and its energy output exceeds that of our Sun by a factor of ma ...
... Why does Mintaka appear so dim given that it is very luminous? Which stars are main sequence stars? Rigel is a true supergiant, blazing white-hot star of intense brilliance and dazzling beauty. Its surface temperature is about 12,000 K and its energy output exceeds that of our Sun by a factor of ma ...
Measuring Astronomical Distances
... Just like Rome, the cosmological distance ladder wasn’t built in one day! Without the hard work of those who dared to believe the universe was larger than they could fathom, we wouldn’t be able to study ...
... Just like Rome, the cosmological distance ladder wasn’t built in one day! Without the hard work of those who dared to believe the universe was larger than they could fathom, we wouldn’t be able to study ...
Distance Measurement in Astronomy
... The direction of Centauri is measured against the background of the distant stars at the two points P1 and P2. The angle 2A is measured and so the parallax (angle A) can be found. If you know the angle A and the radius of the Earth’s orbit (R) you can find the distance of the star (D). Stars that ...
... The direction of Centauri is measured against the background of the distant stars at the two points P1 and P2. The angle 2A is measured and so the parallax (angle A) can be found. If you know the angle A and the radius of the Earth’s orbit (R) you can find the distance of the star (D). Stars that ...
Stars in our Galaxy
... while others disappear. Because circumpolar constellations always orbit Polaris they are visible ALL year long while others are not. ...
... while others disappear. Because circumpolar constellations always orbit Polaris they are visible ALL year long while others are not. ...
Definitions of Magnitudes and Surface Brightness
... One often does not convert absolute magnitudes directly to W m – 2 . One usually goes by the round about process of referring to the absolute magnitude of the sun. In the B andV bands for example, this is: ...
... One often does not convert absolute magnitudes directly to W m – 2 . One usually goes by the round about process of referring to the absolute magnitude of the sun. In the B andV bands for example, this is: ...
Slides from Lecture06
... Brightness (luminosity/magnitude) Color (surface temperature) Mass Age ...
... Brightness (luminosity/magnitude) Color (surface temperature) Mass Age ...
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.