Chapter 10 Hertzsprung-Russel Diagrams and Distance to Stars
... two bands, B − V (B minus V ), was called the B-V color index. Hot stars have a negative index and cooler stars a positive index since in the magnitude system, fainter measurements have greater magnitudes. The B-V color index depends only on a star’s Temperature. Modern astronomers use two other sys ...
... two bands, B − V (B minus V ), was called the B-V color index. Hot stars have a negative index and cooler stars a positive index since in the magnitude system, fainter measurements have greater magnitudes. The B-V color index depends only on a star’s Temperature. Modern astronomers use two other sys ...
Page 1 Astronomy 110 Homework #08 Assigned: 03/13/2007 Due
... A) to dim and redden distant stars by preferentially scattering their blue light. B) to scatter the red light from stars preferentially, making them appear more blue than expected. C) almost nonexistent, because light does not interact with dust. D) to make stars appear less bright than expected by ...
... A) to dim and redden distant stars by preferentially scattering their blue light. B) to scatter the red light from stars preferentially, making them appear more blue than expected. C) almost nonexistent, because light does not interact with dust. D) to make stars appear less bright than expected by ...
solar system formation and gal
... • This theory suggests that planets are byproducts of star formation, so planets should be common since we have a sky filled with stars • Astronomers have discovered over 300 planets that are orbiting other stars and these are called extrasolar planets • Astronomers have used star light level change ...
... • This theory suggests that planets are byproducts of star formation, so planets should be common since we have a sky filled with stars • Astronomers have discovered over 300 planets that are orbiting other stars and these are called extrasolar planets • Astronomers have used star light level change ...
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... cruising with a speed of 477 km/s outward from the center of our Galaxy. If the spectral type of the star is B5V, and the apparent magnitude is mV = 13.0 mag, estimate that this star is fr ...
... cruising with a speed of 477 km/s outward from the center of our Galaxy. If the spectral type of the star is B5V, and the apparent magnitude is mV = 13.0 mag, estimate that this star is fr ...
Measuring the Stars
... •Kepler’s third law gives the sum of the masses of the two stars. •Relative speeds of the two stars can be measured using the Doppler effect •Speed will be inversely proportional to the mass. This allows us to calculate the mass of ...
... •Kepler’s third law gives the sum of the masses of the two stars. •Relative speeds of the two stars can be measured using the Doppler effect •Speed will be inversely proportional to the mass. This allows us to calculate the mass of ...
Note Taking Guide #2: Characteristics of Stars Welcome back! As
... A star’s apparent magnitude is how much light a star appears to give off when viewed from Earth. The closer a star is to Erath, the more light it appears to give off. Think of our sun versus Alpha Centauri; the sun appears to give off much more light, even though the two stars are actually very simi ...
... A star’s apparent magnitude is how much light a star appears to give off when viewed from Earth. The closer a star is to Erath, the more light it appears to give off. Think of our sun versus Alpha Centauri; the sun appears to give off much more light, even though the two stars are actually very simi ...
Massive Stars - University of Washington
... Could a Star Have a Maximum Mass? Compared to our Sun, how much mass could a star possibly have? Maximum mass of a star is an estimated ...
... Could a Star Have a Maximum Mass? Compared to our Sun, how much mass could a star possibly have? Maximum mass of a star is an estimated ...
Lecture 7 Stars and Galaxies and Nebula, (Oh My!) Feb 18 2003
... They orbit in the disk of our galaxy and don't last very long, members escape the group over time. All about the same age and composition so it is likely that they formed around the same time. ...
... They orbit in the disk of our galaxy and don't last very long, members escape the group over time. All about the same age and composition so it is likely that they formed around the same time. ...
stars - Chatt
... • The absence of pressure causes a neutron star or a black hole. • The explosion can be bright enough to see during the day! ...
... • The absence of pressure causes a neutron star or a black hole. • The explosion can be bright enough to see during the day! ...
Grade 6 Standard 4 - Murray School District
... C. They are different distances from the Earth. D. They are all in different galaxies. 9. If 2 stars give off equal amounts of light, why would one look brighter? A. It is revolving with Earth around the Sun. B. It is closer to the Earth. C. It is a black hole. D. It is burning at a higher temperatu ...
... C. They are different distances from the Earth. D. They are all in different galaxies. 9. If 2 stars give off equal amounts of light, why would one look brighter? A. It is revolving with Earth around the Sun. B. It is closer to the Earth. C. It is a black hole. D. It is burning at a higher temperatu ...
Chapter 2: The Sky
... • Could we even define a set of poles and equator? • What is the difference between a constellation and an asterism? Examples? • What does the word apparent mean in the context of “apparent visual magnitude”? ...
... • Could we even define a set of poles and equator? • What is the difference between a constellation and an asterism? Examples? • What does the word apparent mean in the context of “apparent visual magnitude”? ...
CONSTELLATIONS OF THE SOUTHERN SKY VOLANS
... The constellation was first depicted in 1598 on a globe by the Dutchman Petrus Plancius under the name Vliegendenvis. Bayer in 1603 called it Piscis Volans, the Latin title by which it became generally known until the mid 19th century. In 1844 the English astronomer John Herschel proposed shortening ...
... The constellation was first depicted in 1598 on a globe by the Dutchman Petrus Plancius under the name Vliegendenvis. Bayer in 1603 called it Piscis Volans, the Latin title by which it became generally known until the mid 19th century. In 1844 the English astronomer John Herschel proposed shortening ...
Stars: the Hertzsprung
... line from the upper left to the lower right. – Hotter is brighter – Cooler is dimmer • Red giant stars – Upper right hand corner (big, bright, and cool) • White dwarf stars – Lower left hand corner (small, dim, and hot) ...
... line from the upper left to the lower right. – Hotter is brighter – Cooler is dimmer • Red giant stars – Upper right hand corner (big, bright, and cool) • White dwarf stars – Lower left hand corner (small, dim, and hot) ...
Summary: Stellar Distances
... Temperatures can also be inferred from the appearance of a star’s spectrum - the pattern of spectral lines. This spectral typing is not affected by interstellar dust. Surface temperatures of stars almost all lie between 40,000°K for the “bluest” stars to about 3,000°K for the “reddest” stars. Relati ...
... Temperatures can also be inferred from the appearance of a star’s spectrum - the pattern of spectral lines. This spectral typing is not affected by interstellar dust. Surface temperatures of stars almost all lie between 40,000°K for the “bluest” stars to about 3,000°K for the “reddest” stars. Relati ...
Answers to Coursebook questions – Chapter E2
... groupings of stars. Main sequence stars occupy a strip going diagonally down from top left to bottom right, red giants are in the top left part of the diagram and white dwarfs are at the bottom left. ...
... groupings of stars. Main sequence stars occupy a strip going diagonally down from top left to bottom right, red giants are in the top left part of the diagram and white dwarfs are at the bottom left. ...
PHYSICS 113 Practice Questions #2
... d. the remnant of a star that exploded several thousand years ago e. an illusion caused by activity in the Earth's upper atmosphere 14. When a star settles down to a stable existence as a main-sequence star, what characteristics determines where on the main sequence in an H-R d iagram the star will ...
... d. the remnant of a star that exploded several thousand years ago e. an illusion caused by activity in the Earth's upper atmosphere 14. When a star settles down to a stable existence as a main-sequence star, what characteristics determines where on the main sequence in an H-R d iagram the star will ...
Problem 4: magnitude of the star?
... index B-V=0 are all characteristics of stars with spectral type A. A0 B. B0 C. F0 D. G0 E. K0 __C___13. A star forms on the main sequence with twice the mass of our sun. It’s lifetime on the main sequence, relative to that for a solar mass star, is A. The same B. Half as long C. 1/4 as long D. 1/9 a ...
... index B-V=0 are all characteristics of stars with spectral type A. A0 B. B0 C. F0 D. G0 E. K0 __C___13. A star forms on the main sequence with twice the mass of our sun. It’s lifetime on the main sequence, relative to that for a solar mass star, is A. The same B. Half as long C. 1/4 as long D. 1/9 a ...
Describe essential ideas about the composition and structure of the
... selected past and present scientists in the field of astronomy. Identify and articulate space program efforts to investigate possibilities of living in space and on other planets. Explain essential ideas about the composition and structure of the universe. Compare the basic structures of the uni ...
... selected past and present scientists in the field of astronomy. Identify and articulate space program efforts to investigate possibilities of living in space and on other planets. Explain essential ideas about the composition and structure of the universe. Compare the basic structures of the uni ...
Stars
... •With Newton’s modifications to Kepler’s laws, the period and size of the orbits yield the sum of the masses, while the relative distance of each star from the center of mass yields the ratio of the masses. •The ratio and sum provide each mass individually. ...
... •With Newton’s modifications to Kepler’s laws, the period and size of the orbits yield the sum of the masses, while the relative distance of each star from the center of mass yields the ratio of the masses. •The ratio and sum provide each mass individually. ...
Interstellar clouds
... • A possible fate of a white dwarf that is part of a binary star system. • A white dwarf’s immense gravity can pull matter from a companion star forming an accretion disk around the white dwarf. • More material more gravity, more gravity the white dwarf shrinks, temperatures increase and any hydroge ...
... • A possible fate of a white dwarf that is part of a binary star system. • A white dwarf’s immense gravity can pull matter from a companion star forming an accretion disk around the white dwarf. • More material more gravity, more gravity the white dwarf shrinks, temperatures increase and any hydroge ...
Physical Attributes of Stars
... c. Explain why the pattern of stars in a constellation stays the same, but a planet can be seen in different locations at different times. d. Identify how technology is used to observe distant objects in the sky. S4E2. Students will model the position and motion of the earth in the solar system and ...
... c. Explain why the pattern of stars in a constellation stays the same, but a planet can be seen in different locations at different times. d. Identify how technology is used to observe distant objects in the sky. S4E2. Students will model the position and motion of the earth in the solar system and ...
Phys133-Sample MT2
... 6) No stars have been found with masses greater than 200-300 times our Sun because A) they would fragment into binary stars because of their rapid rotation. B) they would generate so much power that they would blow themselves apart. C) they are not bright enough to be seen nearby. D) molecular cloud ...
... 6) No stars have been found with masses greater than 200-300 times our Sun because A) they would fragment into binary stars because of their rapid rotation. B) they would generate so much power that they would blow themselves apart. C) they are not bright enough to be seen nearby. D) molecular cloud ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.