Measuring Distance in our Universe. Due Tue 1 Dec 2009 Imagine
... minutes to get to the Sun from Earth. To get to the next nearest star, Proxima Centauri, it would take 4.2 years traveling at the speed of light. Distances on earth are often measured in kilometers but distances to the stars are so large that kilometers aren’t very practical units. Astronomers use t ...
... minutes to get to the Sun from Earth. To get to the next nearest star, Proxima Centauri, it would take 4.2 years traveling at the speed of light. Distances on earth are often measured in kilometers but distances to the stars are so large that kilometers aren’t very practical units. Astronomers use t ...
Study Guide Ch10,11 and 12
... 2. How is the mass of the Milky Way measured, and how does this lead to the concept of dark matter? 3. How are the spiral arms of the Milky Way detected, and what is their nature? 4. Discuss the reason for the differences between population I and population II stars. 5. Describe the characteristics ...
... 2. How is the mass of the Milky Way measured, and how does this lead to the concept of dark matter? 3. How are the spiral arms of the Milky Way detected, and what is their nature? 4. Discuss the reason for the differences between population I and population II stars. 5. Describe the characteristics ...
Stellar Classification
... Students will • Calculate the luminosity of stars given their magnitudes • Plot stars on an HR diagram • Compare plotted diagram to a real HR diagram Connection to Space Odyssey Students can learn about stars at our Life of a Star interactive in Space Odyssey. Here they will choose a star based on i ...
... Students will • Calculate the luminosity of stars given their magnitudes • Plot stars on an HR diagram • Compare plotted diagram to a real HR diagram Connection to Space Odyssey Students can learn about stars at our Life of a Star interactive in Space Odyssey. Here they will choose a star based on i ...
ASTR 220 Homework #7 Solutions
... From the diagrams, we can see that any pattern we begin with in the galaxy will be destroyed over time by the rotation of the galaxy. Since stars at different distances from the center of the galaxy have different orbital periods, no pattern can stay fixed. The stars in the outer part of the galaxy ...
... From the diagrams, we can see that any pattern we begin with in the galaxy will be destroyed over time by the rotation of the galaxy. Since stars at different distances from the center of the galaxy have different orbital periods, no pattern can stay fixed. The stars in the outer part of the galaxy ...
LESSON 4, STARS
... Bear, can help you find Polaris, the North Star. If you are unsure of directions, the North Star can help you. Because of our perspective, the stars in the sky ...
... Bear, can help you find Polaris, the North Star. If you are unsure of directions, the North Star can help you. Because of our perspective, the stars in the sky ...
Ch. 19 (Starbirth)
... This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching their courses and assessing student learning. Dissemination or sale of any part of this work (including on the World Wide Web) will destroy the integrity of the work and is not permit ...
... This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching their courses and assessing student learning. Dissemination or sale of any part of this work (including on the World Wide Web) will destroy the integrity of the work and is not permit ...
PHY 133 - GEOCITIES.ws
... the sun is a baseball, the ENTIRE solar system will span less than a mile. The next nearest area that is so crowded with stuff will be 1500 miles away! And there’s virtually nothing in between except for random molecules and atoms and occasional rocks or snowballs! The UNIVERSE IS HUGE!! AND EMPTY!! ...
... the sun is a baseball, the ENTIRE solar system will span less than a mile. The next nearest area that is so crowded with stuff will be 1500 miles away! And there’s virtually nothing in between except for random molecules and atoms and occasional rocks or snowballs! The UNIVERSE IS HUGE!! AND EMPTY!! ...
Volume 20 Number 10 September 2012
... ever seen, - it exceeded what many astronomers thought was a maximum about 150 times the mass of the Sun. The heavyweight champs resided 160,000 light-years from Earth in Radcliffe 136, a dense star cluster within the Large Magellanic Cloud, the brightest galaxy that revolves around our Milky Way. T ...
... ever seen, - it exceeded what many astronomers thought was a maximum about 150 times the mass of the Sun. The heavyweight champs resided 160,000 light-years from Earth in Radcliffe 136, a dense star cluster within the Large Magellanic Cloud, the brightest galaxy that revolves around our Milky Way. T ...
Lecture 9: Stellar Spectra
... blue light more efficiently than red light. Most stars appear to be REDDER than they really are. A star’s color no longer tells you its tempertuare. But the spectrum still does! ...
... blue light more efficiently than red light. Most stars appear to be REDDER than they really are. A star’s color no longer tells you its tempertuare. But the spectrum still does! ...
arXiv:0712.2297v1 [astro
... The HET observations and data analysis for this survey have been described by Niedzielski et al. (2007). Briefly, we observe with the HET in its queue-scheduling mode and use the HRS at the R=60,000 resolution with the gas cell (I2 ) inserted in the optical path. In our target selection, we avoid br ...
... The HET observations and data analysis for this survey have been described by Niedzielski et al. (2007). Briefly, we observe with the HET in its queue-scheduling mode and use the HRS at the R=60,000 resolution with the gas cell (I2 ) inserted in the optical path. In our target selection, we avoid br ...
colour
... Spectrum . . . yields information about surface chemical composition and gravity Evidence from: • Individual stars • Binary systems • Star clusters....these reveal how stars evolve with time • Nuclear physics...energy source, synthesis of heavy elements No direct information about physical condition ...
... Spectrum . . . yields information about surface chemical composition and gravity Evidence from: • Individual stars • Binary systems • Star clusters....these reveal how stars evolve with time • Nuclear physics...energy source, synthesis of heavy elements No direct information about physical condition ...
STELLAR STRUCTURE AND EVOLUTION
... Spectrum . . . yields information about surface chemical composition and gravity Evidence from: • Individual stars • Binary systems • Star clusters....these reveal how stars evolve with time • Nuclear physics...energy source, synthesis of heavy elements No direct information about physical condition ...
... Spectrum . . . yields information about surface chemical composition and gravity Evidence from: • Individual stars • Binary systems • Star clusters....these reveal how stars evolve with time • Nuclear physics...energy source, synthesis of heavy elements No direct information about physical condition ...
Our Universe
... •Is there a black hole in the center of our Milky Way- YES! •The fundamental descriptions of black holes are based on equations in the theory of general relativity developed by the German-born physicist Albert Einstein. The theory was published in 1916. •The surface of a black hole is known as the e ...
... •Is there a black hole in the center of our Milky Way- YES! •The fundamental descriptions of black holes are based on equations in the theory of general relativity developed by the German-born physicist Albert Einstein. The theory was published in 1916. •The surface of a black hole is known as the e ...
Stars Notes
... • Outer layers continue to expand and form a planetary nebula • Remaining core is now a white dwarf which is dense and slowly cools and no longer produces energy ...
... • Outer layers continue to expand and form a planetary nebula • Remaining core is now a white dwarf which is dense and slowly cools and no longer produces energy ...
Starbirth and Interstellar Matter
... A. atoms. B. molecules. C. ions. D. all of the above 16. A bright nebula that arises from the scattering of starlight by dust particles is called a: A. reflection nebula. B. brightness nebula. C. luminous nebula. D. emission nebula. 17. Generally, interstellar dust makes itself known by: A. outgassi ...
... A. atoms. B. molecules. C. ions. D. all of the above 16. A bright nebula that arises from the scattering of starlight by dust particles is called a: A. reflection nebula. B. brightness nebula. C. luminous nebula. D. emission nebula. 17. Generally, interstellar dust makes itself known by: A. outgassi ...
Today`s Powerpoint
... stars produce huge amounts of these. Such short-lived stars spend all their lives in the stellar nursery of their birth, so emission nebulae mark sites of ongoing star formation. Many stars of lower mass are forming too, but make few UV photons. ...
... stars produce huge amounts of these. Such short-lived stars spend all their lives in the stellar nursery of their birth, so emission nebulae mark sites of ongoing star formation. Many stars of lower mass are forming too, but make few UV photons. ...
Slides from Lecture06
... Measuring Stellar Masses • Astronomers determine the mass of a star by examining how strong the gravitational field is around that star. (Isaac Newton’s law of universal gravitation; §4-7) • By studying the motion of planets around our Sun, astronomers have determined that the Sun has a mass of 2 x ...
... Measuring Stellar Masses • Astronomers determine the mass of a star by examining how strong the gravitational field is around that star. (Isaac Newton’s law of universal gravitation; §4-7) • By studying the motion of planets around our Sun, astronomers have determined that the Sun has a mass of 2 x ...
PHYS 390 Lecture 3
... temperature) of nearby stars whose distance is known from parallax, then measuring the same observable on a distant star. For example (i) L is related to surface temperature for many stars Light emitted from a hot object has a distribution of wavelengths that is specific to the object’s temperature. ...
... temperature) of nearby stars whose distance is known from parallax, then measuring the same observable on a distant star. For example (i) L is related to surface temperature for many stars Light emitted from a hot object has a distribution of wavelengths that is specific to the object’s temperature. ...
Slide 1
... A light year is the distance light travels in one year. One light year = six trillion miles. ...
... A light year is the distance light travels in one year. One light year = six trillion miles. ...
Lesson 4, Stars
... constellations can be seen, like Orion, which is a winter constellation in the ...
... constellations can be seen, like Orion, which is a winter constellation in the ...
Standard EPS Shell Presentation
... values for absolute brightness using a source of light called a standard ...
... values for absolute brightness using a source of light called a standard ...
Teacher Guide - Astronomy Outreach at UT Austin
... This activity is an opportunity for students to learn about the fundamental characterisitcs of stars and their life cycles. Students perform a play as members of an interview with several different stars. As the play progresses, students develop an understanding of the most fundamental concepts in s ...
... This activity is an opportunity for students to learn about the fundamental characterisitcs of stars and their life cycles. Students perform a play as members of an interview with several different stars. As the play progresses, students develop an understanding of the most fundamental concepts in s ...
Stars
... sky, called Sirius. It is also the “Dog Star” because it forms the eye of the Great Dog, Canis Majoris. Sirius is bright for two reasons: first, because it is has a spectral class of A1, it is intrinsically bright. Its surface temperature is about 10,000 K. If Sirius were to somehow trade places wit ...
... sky, called Sirius. It is also the “Dog Star” because it forms the eye of the Great Dog, Canis Majoris. Sirius is bright for two reasons: first, because it is has a spectral class of A1, it is intrinsically bright. Its surface temperature is about 10,000 K. If Sirius were to somehow trade places wit ...
Stellar kinematics
Stellar kinematics is the study of the movement of stars without needing to understand how they acquired their motion. This differs from stellar dynamics, which takes into account gravitational effects. The motion of a star relative to the Sun can provide useful information about the origin and age of a star, as well as the structure and evolution of the surrounding part of the Milky Way.In astronomy, it is widely accepted that most stars are born within molecular clouds known as stellar nurseries. The stars formed within such a cloud compose open clusters containing dozens to thousands of members. These clusters dissociate over time. Stars that separate themselves from the cluster's core are designated as members of the cluster's stellar association. If the remnant later drifts through the Milky Way as a coherent assemblage, then it is termed a moving group.