Announcements Evolution of High-Mass Stars: Red Supergiants
... • To map the Milky Way Galaxy, we need to measure distances to stars. • Parallax only works for nearby stars (within about 1000 light years) • For more distant stars, we use Standard Candles Car Headlights are standard candles: We use them to determine the car’s distance ...
... • To map the Milky Way Galaxy, we need to measure distances to stars. • Parallax only works for nearby stars (within about 1000 light years) • For more distant stars, we use Standard Candles Car Headlights are standard candles: We use them to determine the car’s distance ...
Astronomy 2
... Each star is represented by a dot. One uses data from lots of stars, so there are lots of dots. The position of each dot on the diagram corresponds to the star's luminosity and its temperature The vertical position represents the star's luminosity (absolute magnitude). The horizontal position re ...
... Each star is represented by a dot. One uses data from lots of stars, so there are lots of dots. The position of each dot on the diagram corresponds to the star's luminosity and its temperature The vertical position represents the star's luminosity (absolute magnitude). The horizontal position re ...
Stellar Properties
... what would be the distance to the star? A)1/5, b)1. c)5, d)25 pc 2. Star A and B have same luminosity. If star A is 4 times closer to Earth then star B, then _____ to earthly viewer.: a=A is 4 x brighter, b=B is 4x brighter, c=A is 16 times brighter d=B is 16 times brighter, e=A is 64x brighter 3. A ...
... what would be the distance to the star? A)1/5, b)1. c)5, d)25 pc 2. Star A and B have same luminosity. If star A is 4 times closer to Earth then star B, then _____ to earthly viewer.: a=A is 4 x brighter, b=B is 4x brighter, c=A is 16 times brighter d=B is 16 times brighter, e=A is 64x brighter 3. A ...
Welcome to Astro 10! - UC Berkeley Astronomy w
... Seeing into the past • The nearest star, Proxima Centauri, is 4.2 ly away! • Other stars are even larger distances, so we see them farther back in the past. • The nearest galaxy, Andromeda, is 2.4 million ly from us. • The nearest Galaxies, stars, and other objects like Quasars can be seen up to 13 ...
... Seeing into the past • The nearest star, Proxima Centauri, is 4.2 ly away! • Other stars are even larger distances, so we see them farther back in the past. • The nearest galaxy, Andromeda, is 2.4 million ly from us. • The nearest Galaxies, stars, and other objects like Quasars can be seen up to 13 ...
ORIGIN OF THE UNIVERSE
... - Collections of similar galaxies found within a cluster. Our galaxy is found in the “Local Group” which contains about 29 other galaxies Galaxy - A collection of similar stars found within a star group. Our galaxy is called the Milky Way and contains about 200 Billion Stars. - There may be about 10 ...
... - Collections of similar galaxies found within a cluster. Our galaxy is found in the “Local Group” which contains about 29 other galaxies Galaxy - A collection of similar stars found within a star group. Our galaxy is called the Milky Way and contains about 200 Billion Stars. - There may be about 10 ...
Measuring Stars
... •The Giants are rare but very bright •The Supergiants are very rare but extremely bright •The White Dwarfs are not uncommon but very dim ...
... •The Giants are rare but very bright •The Supergiants are very rare but extremely bright •The White Dwarfs are not uncommon but very dim ...
Introduction to Stars: Their Properties
... Define brightness (see text), apparent magnitude, absolute magnitude. ...
... Define brightness (see text), apparent magnitude, absolute magnitude. ...
galaxies and stars - Valhalla High School
... • It takes 2 million years for light from the Andromeda galaxy to reach earth. • Astronomers have classified most galaxies into three main categories: spiral, elliptical and irregular. ...
... • It takes 2 million years for light from the Andromeda galaxy to reach earth. • Astronomers have classified most galaxies into three main categories: spiral, elliptical and irregular. ...
Morning Announcements
... Activity: Early this century, two researchers, Enjar Hertzsprung and Henry Norris Russell independently developed what has come to be known as the Hertzsprung-Russell (HR) diagram. The HR diagram is a plot of absolute magnitude/luminosity on the vertical axis versus spectral class/temperature/color ...
... Activity: Early this century, two researchers, Enjar Hertzsprung and Henry Norris Russell independently developed what has come to be known as the Hertzsprung-Russell (HR) diagram. The HR diagram is a plot of absolute magnitude/luminosity on the vertical axis versus spectral class/temperature/color ...
Notes: Astronomy and Groups of Stars
... Oval shaped, Extremely bright, Older stars No regular shape, Very low mass Made of gas and dust, Least common Looks like a wheel with arm extensions Most common type Arms consist of younger stars, gas/dust. - our galaxy -100’s of billions of stars - it takes 100,000 light years to travel across our ...
... Oval shaped, Extremely bright, Older stars No regular shape, Very low mass Made of gas and dust, Least common Looks like a wheel with arm extensions Most common type Arms consist of younger stars, gas/dust. - our galaxy -100’s of billions of stars - it takes 100,000 light years to travel across our ...
Stars and Galaxies - Earth Science: Astronomy
... A. Galaxy—gravity holds together a large collection of stars, gas, and dust 1. Earth’s galaxy is Milky Way which is part of a galaxy cluster named the Local Group 2. Spiral galaxies—spiral arms wind out from inner section; some have barred spirals with stars and gas in a central bar ...
... A. Galaxy—gravity holds together a large collection of stars, gas, and dust 1. Earth’s galaxy is Milky Way which is part of a galaxy cluster named the Local Group 2. Spiral galaxies—spiral arms wind out from inner section; some have barred spirals with stars and gas in a central bar ...
Size and Scale
... Ordering by Size What is the correct order from smallest to largest, of the following objects? Andromeda Galaxy, Jupiter, Galaxy Cluster, Asteroid, Sun, Solar System (a) Jupiter, Asteroid, Sun, Solar System, Andromeda Galaxy, Galaxy ...
... Ordering by Size What is the correct order from smallest to largest, of the following objects? Andromeda Galaxy, Jupiter, Galaxy Cluster, Asteroid, Sun, Solar System (a) Jupiter, Asteroid, Sun, Solar System, Andromeda Galaxy, Galaxy ...
fall semester review
... 35. If a star is 17 light years away from us, how long does it take light from that star to reach Earth? 17 years 36. What is the importance of using different units of measurement for different lengths? Some distances are much shorter or longer than others so we use different measurements to make ...
... 35. If a star is 17 light years away from us, how long does it take light from that star to reach Earth? 17 years 36. What is the importance of using different units of measurement for different lengths? Some distances are much shorter or longer than others so we use different measurements to make ...
Astronomy 160: Frontiers and Controversies in Astrophysics
... This question is somewhat ambiguous and there are (at least) two possible answers that I saw that got full credit. The first answer (which accounted for the majority of the correct answers) had to do with the use of parallax as the base of the distance ladder. The idea is that the length of the AU i ...
... This question is somewhat ambiguous and there are (at least) two possible answers that I saw that got full credit. The first answer (which accounted for the majority of the correct answers) had to do with the use of parallax as the base of the distance ladder. The idea is that the length of the AU i ...
Study Guide for Stars and the Universe Test
... 1. What types of radiation make up the electromagnetic spectrum? 2. Define the three types of spectra. 3. How do scientists determine the elements present in a star. 4. How can scientists determine whether a star is moving toward or away from Earth? 5. How does a reflecting telescope differ from a r ...
... 1. What types of radiation make up the electromagnetic spectrum? 2. Define the three types of spectra. 3. How do scientists determine the elements present in a star. 4. How can scientists determine whether a star is moving toward or away from Earth? 5. How does a reflecting telescope differ from a r ...
ASTR2050 Spring 2005 •
... A certain telescope allows you to see a million times more light than your naked eye. What is the faintest magnitude star that you can see now? ...
... A certain telescope allows you to see a million times more light than your naked eye. What is the faintest magnitude star that you can see now? ...
Part 1, Some Basics
... Binary star systems: stellar masses • The masses can be computed from measurements of the orbital period and orbital size of the system • The mass ratio of M1 and M2 is inversely proportional to the distance of stars to the center of mass ...
... Binary star systems: stellar masses • The masses can be computed from measurements of the orbital period and orbital size of the system • The mass ratio of M1 and M2 is inversely proportional to the distance of stars to the center of mass ...
What Can We See in the Night Sky?
... Star Clusters • Groups of stars that are close together and travel together are known as star clusters • Star clusters are part of galaxies • Open clusters – contain about 50 to 1000 stars – dispersed along the Milky Way’s main band ...
... Star Clusters • Groups of stars that are close together and travel together are known as star clusters • Star clusters are part of galaxies • Open clusters – contain about 50 to 1000 stars – dispersed along the Milky Way’s main band ...
runaway - Astronomy & Astrophysics Group
... of them are rather large and quite bright, while the number of smaller ones is quite beyond calculation.” from The Starry Messenger (1610) ...
... of them are rather large and quite bright, while the number of smaller ones is quite beyond calculation.” from The Starry Messenger (1610) ...
Chapter 11 Review
... Why are the distances between bodies in the solar system not measured in light-years? Why is it best to use a long baseline when determining distances using triangulation? Explain why parallax is not a good technique for determining distances of stars that are extremely far away (that is, greater th ...
... Why are the distances between bodies in the solar system not measured in light-years? Why is it best to use a long baseline when determining distances using triangulation? Explain why parallax is not a good technique for determining distances of stars that are extremely far away (that is, greater th ...
THE MILKY WAY GALAXY
... disk, from our perspective more stars are visible looking through the disk then are seen looking away from the disk. The nature and size of the Galaxy, as well as our location within this stellar system were finally appreciated in the early 20th century when: The locations of the globular clusters ...
... disk, from our perspective more stars are visible looking through the disk then are seen looking away from the disk. The nature and size of the Galaxy, as well as our location within this stellar system were finally appreciated in the early 20th century when: The locations of the globular clusters ...
Abstract Submitted for the PHY599 Meeting of
... The Ages of Stars STEFAN WALTER, Stony Brook University — In my talk I will speak about one of the most fundamental properties of a star, namely its age. The motivation to determine a star’s age is that it allows the study of the time evolution of astronomical phenomena related to stars and their su ...
... The Ages of Stars STEFAN WALTER, Stony Brook University — In my talk I will speak about one of the most fundamental properties of a star, namely its age. The motivation to determine a star’s age is that it allows the study of the time evolution of astronomical phenomena related to stars and their su ...
Study Guide: Use your notes and handouts to
... 11. What are the three types of galaxies? 12. What is the name of our galaxy? What type of galaxy is it? ...
... 11. What are the three types of galaxies? 12. What is the name of our galaxy? What type of galaxy is it? ...
What is the net result of the proton-proton chain? a. 2 protons make
... b. 12,300 K c. 15 million K d. 3,500 K e. 5,800 K The absolute magnitude of a star is its brightness as seen from a distance of: a. One million kilometers b. One astronomical unit (AU) c. One light year d. Ten parsecs e. Ten light years What are the two most important intrinsic properties used to c ...
... b. 12,300 K c. 15 million K d. 3,500 K e. 5,800 K The absolute magnitude of a star is its brightness as seen from a distance of: a. One million kilometers b. One astronomical unit (AU) c. One light year d. Ten parsecs e. Ten light years What are the two most important intrinsic properties used to c ...
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.