Chapter 23 The Milky Way Galaxy
... balance between gravity and pressure—they have large oscillations around stability. ...
... balance between gravity and pressure—they have large oscillations around stability. ...
Stars Unit
... This is the real brightness of a star from 32.6 light years away…. not from earth ...
... This is the real brightness of a star from 32.6 light years away…. not from earth ...
Stellar Kinematics
... Stars will stay bound in a cluster unless their initial velocities allow them to overcome the gravity of the rest of the cluster ...
... Stars will stay bound in a cluster unless their initial velocities allow them to overcome the gravity of the rest of the cluster ...
David`s Mapping the Heavens[1]
... Complete the following table. In each column outline what theory each astronomer came up with. Shapley ...
... Complete the following table. In each column outline what theory each astronomer came up with. Shapley ...
Light Energy, Dark Energy 1. Another View of Olber's Paradox
... meter of its surface. In comparison, how much energy per square meter does it receive from other stars? (Don't give a number, just compare.) The amount of light the Sun receives from other stars per square meter is comparable to the amount of light the Earth receives from other stars per square mete ...
... meter of its surface. In comparison, how much energy per square meter does it receive from other stars? (Don't give a number, just compare.) The amount of light the Sun receives from other stars per square meter is comparable to the amount of light the Earth receives from other stars per square mete ...
Astronomy_Stars_n_Galaxies_PowerPoint
... 3. Did any of the stars in your analysis have the same chemical composition? ...
... 3. Did any of the stars in your analysis have the same chemical composition? ...
Weighing a Black Hole
... there is a lot of radio emission, and which is believed to correspond to the approximate location of the galactic center. This was not easy to do! In order to track the motions of these stars, they observed the same part of the sky year after year using the largest optical telescope in the world, th ...
... there is a lot of radio emission, and which is believed to correspond to the approximate location of the galactic center. This was not easy to do! In order to track the motions of these stars, they observed the same part of the sky year after year using the largest optical telescope in the world, th ...
Galaxies - Stockton University
... Actual proof of the Milky Way consisting of many stars came in 1610 when Galileo Galilei used a telescope to study the Milky Way and discovered that it was composed of a huge number of faint stars ...
... Actual proof of the Milky Way consisting of many stars came in 1610 when Galileo Galilei used a telescope to study the Milky Way and discovered that it was composed of a huge number of faint stars ...
Unit 1 The Universe
... • Apparent magnitude -measure of a star’s brightness as seen from Earth. – Luminosity- actual brightness of a star. • Absolute magnitude -measure of how bright a star would be if the star were located at a standard distance. ...
... • Apparent magnitude -measure of a star’s brightness as seen from Earth. – Luminosity- actual brightness of a star. • Absolute magnitude -measure of how bright a star would be if the star were located at a standard distance. ...
relativistic time correction on movement of distant galaxies
... at about 13.4+5=18.4 billion years ago. (In fact, present age of this star is to be multiplied by 1+z =1.98. So it is 5x1.98= 9.9 billion light years. But we have just received light from that galaxy and hence cannot see the past life of star). But 18.4 billion years is greater than the present esti ...
... at about 13.4+5=18.4 billion years ago. (In fact, present age of this star is to be multiplied by 1+z =1.98. So it is 5x1.98= 9.9 billion light years. But we have just received light from that galaxy and hence cannot see the past life of star). But 18.4 billion years is greater than the present esti ...
Eagle Nebula - Amazing Space
... off from the cloud feeding them. While some of the EGGs are large enough to eventually become stars, others may never make it. ...
... off from the cloud feeding them. While some of the EGGs are large enough to eventually become stars, others may never make it. ...
Part I: Modeling Light Years - The “Student
... Part I: Modeling Light Years - The “Student-Minute” A light year is the distance light can travel in one Earth year. It is a defined unit based on the speed of light. Light years are units that allow us to measure and discuss extremely long distances, but the concept of a light year can be modeled a ...
... Part I: Modeling Light Years - The “Student-Minute” A light year is the distance light can travel in one Earth year. It is a defined unit based on the speed of light. Light years are units that allow us to measure and discuss extremely long distances, but the concept of a light year can be modeled a ...
Lecture 16
... How do we find relationships between the stars? First, from the stars near enough to determine we obtain distance and relative luminosity. Then, using the procedures outlined above we determine absolute luminosity and radius . From Doppler shift data on double star systems we can determine masses. F ...
... How do we find relationships between the stars? First, from the stars near enough to determine we obtain distance and relative luminosity. Then, using the procedures outlined above we determine absolute luminosity and radius . From Doppler shift data on double star systems we can determine masses. F ...
Round_2_Solutions _2015
... about 10-4 radians (see calculations above), or about 6 x 10-3 degrees. This is when Venus is observed at near its greatest angle from the Sun. But Venus is observed near sunrise of sunset, low in the horizon, so the observation is looking through a thick layer of atmosphere at that angle and this c ...
... about 10-4 radians (see calculations above), or about 6 x 10-3 degrees. This is when Venus is observed at near its greatest angle from the Sun. But Venus is observed near sunrise of sunset, low in the horizon, so the observation is looking through a thick layer of atmosphere at that angle and this c ...
Measuring Distance in the Universe
... more precise changes. A satellite called Hipparcos measured the slight motions of stars and it had an accuracy of about 1 milli-arcsecond, which means that under ideal circumstances, it could measure the distances to objects little over three thousand light years away. There are errors, things crop ...
... more precise changes. A satellite called Hipparcos measured the slight motions of stars and it had an accuracy of about 1 milli-arcsecond, which means that under ideal circumstances, it could measure the distances to objects little over three thousand light years away. There are errors, things crop ...
Goal: To understand how Saturn formed and what its core is
... • If the planet exerts the same force on the star as the star exerts on the planet, what will happen to the star (which is thousands to millions times more massive than the planet)? ...
... • If the planet exerts the same force on the star as the star exerts on the planet, what will happen to the star (which is thousands to millions times more massive than the planet)? ...
07optics_8inch_cass
... • Size of blob: “A” is aperture, is wavelength in radians (multiply by 206,265 to convert to arcseconds) • For our telescope (A=203 mm), for 500nm light the blob is 0.6”. (Limiting Optical Resolution of scope is listed as 0.68”). ...
... • Size of blob: “A” is aperture, is wavelength in radians (multiply by 206,265 to convert to arcseconds) • For our telescope (A=203 mm), for 500nm light the blob is 0.6”. (Limiting Optical Resolution of scope is listed as 0.68”). ...
dtu7ech11 - Fort Thomas Independent Schools
... Stars range from more than 1000 times the Sun’s diameter to less than 1/100 the Sun’s diameter. Are most stars isolated from other stars, as the Sun is? No. In the vicinity of the Sun, two-thirds of the stars are found in pairs or larger groups. ...
... Stars range from more than 1000 times the Sun’s diameter to less than 1/100 the Sun’s diameter. Are most stars isolated from other stars, as the Sun is? No. In the vicinity of the Sun, two-thirds of the stars are found in pairs or larger groups. ...
Slide 1
... •Ellipticals have lots of globular clusters (about twice that of disk galaxies) •these fall into two groups based on color •color determined by metallicity, with more metal-rich GCs (redder) possibly the result of galaxy mergers •Ellipticals have much less cool, atomic gas than spiral galaxies •< 1 ...
... •Ellipticals have lots of globular clusters (about twice that of disk galaxies) •these fall into two groups based on color •color determined by metallicity, with more metal-rich GCs (redder) possibly the result of galaxy mergers •Ellipticals have much less cool, atomic gas than spiral galaxies •< 1 ...
Physics Observing The Universe
... luminosity. 4. Knowing both the luminosity and the intensity of its light at the telescope, calculate the distance of the star. ...
... luminosity. 4. Knowing both the luminosity and the intensity of its light at the telescope, calculate the distance of the star. ...
HR Diagram - Geneva 304
... a. optical doubles b. double star / binary star c. spectroscopic binary 43. How could you recognize an eclipsing binary? 44. About what percent of all stars are members of a double star system? 45. What is a variable star? 46. Of what spectral type are Mira variables, and how big are they relative t ...
... a. optical doubles b. double star / binary star c. spectroscopic binary 43. How could you recognize an eclipsing binary? 44. About what percent of all stars are members of a double star system? 45. What is a variable star? 46. Of what spectral type are Mira variables, and how big are they relative t ...
HR Diagram
... 8. Compare your results for NGC with data given at end of writeup. If way off check for errors. 9. Go through the step 6 procedure again using M45 (younger cluster) 10. Go thought step 7 procedure again using M45. 11. Go through procedure again using M67 (older cluster). 12. Compute the distances in ...
... 8. Compare your results for NGC with data given at end of writeup. If way off check for errors. 9. Go through the step 6 procedure again using M45 (younger cluster) 10. Go thought step 7 procedure again using M45. 11. Go through procedure again using M67 (older cluster). 12. Compute the distances in ...
Astronomy in the secondary school classroom
... Astronomy (astro = star, nomen = name in Greek) is the observational study of matter beyond Earth – planets in the Solar System, stars in the Milky Way Galaxy, galaxies in the Universe, and diffuse matter between these concentrations. The perspective is rooted from our viewpoint on or near Earth usi ...
... Astronomy (astro = star, nomen = name in Greek) is the observational study of matter beyond Earth – planets in the Solar System, stars in the Milky Way Galaxy, galaxies in the Universe, and diffuse matter between these concentrations. The perspective is rooted from our viewpoint on or near Earth usi ...
Astronomy - Virginia Science Olympiad
... form galaxy group) MACSJ0717 (Galaxy cluster) Bullet Cluster (two colliding galaxies, evidence for dark matter) Perseus A (Seyfert galaxy) ...
... form galaxy group) MACSJ0717 (Galaxy cluster) Bullet Cluster (two colliding galaxies, evidence for dark matter) Perseus A (Seyfert galaxy) ...
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.