The Hubble Redshift Distance Relation
... is actually 100 times brighter in flux. In other words, a difference in magnitudes of 5 corresponds to a ratio in brightness of 100. It turns out that the human eye measures changes in brightness on a logarithmic scale; what appears to us as an incremental step up in brightness is actually a multipl ...
... is actually 100 times brighter in flux. In other words, a difference in magnitudes of 5 corresponds to a ratio in brightness of 100. It turns out that the human eye measures changes in brightness on a logarithmic scale; what appears to us as an incremental step up in brightness is actually a multipl ...
Solutions - UC Berkeley Astronomy w
... The Shapley-Curtis debate centered around the question of whether spiral nebulae are clouds within the Milky Way or distinct systems, separate and distant from the Milky Way galaxy. Once it was realized that these nebulae are distant galaxies like our own Milky Way, it greatly increased the understo ...
... The Shapley-Curtis debate centered around the question of whether spiral nebulae are clouds within the Milky Way or distinct systems, separate and distant from the Milky Way galaxy. Once it was realized that these nebulae are distant galaxies like our own Milky Way, it greatly increased the understo ...
Chapter 25 Beyond Our Solar System
... • At some point after fusion begins, a star becomes a balanced, mainsequence star. For an average star, this stage lasts 90 percent of the star’s life. • Once all of the hydrogen in a star’s core is consumed, the star expands and cools, becoming a red giant. All stars, regardless of their size, even ...
... • At some point after fusion begins, a star becomes a balanced, mainsequence star. For an average star, this stage lasts 90 percent of the star’s life. • Once all of the hydrogen in a star’s core is consumed, the star expands and cools, becoming a red giant. All stars, regardless of their size, even ...
Constellation, Star, and Deep Sky Object
... Magnitude scales: The smaller the magnitude number, the brighter the star Every 5 magnitudes = 100 times the brightness of object Every magnitude = 2.512 times the brightness of object Apparent magnitude = the brightness of object as seen from the viewer’s viewpoint (Earth) Absolute magnitude = “tru ...
... Magnitude scales: The smaller the magnitude number, the brighter the star Every 5 magnitudes = 100 times the brightness of object Every magnitude = 2.512 times the brightness of object Apparent magnitude = the brightness of object as seen from the viewer’s viewpoint (Earth) Absolute magnitude = “tru ...
Universe 8e Lecture Chapter 24 Galaxies
... Elliptical galaxies are nearly devoid of interstellar gas and dust, and so star formation is severely inhibited. Lenticular galaxies are intermediate between spiral and elliptical galaxies. Irregular galaxies have ill-defined, asymmetrical shapes. They are often found associated with other galaxies. ...
... Elliptical galaxies are nearly devoid of interstellar gas and dust, and so star formation is severely inhibited. Lenticular galaxies are intermediate between spiral and elliptical galaxies. Irregular galaxies have ill-defined, asymmetrical shapes. They are often found associated with other galaxies. ...
MST Review DQ Week 5 - Biloxi Public Schools
... B. The probe will undergo constant acceleration until a force acts on it. C. The probe will continue on its current path until an unbalanced force acts on it. D. The force that makes the probe move through space is equal to its mass divided by its velocity. Justification--___________________________ ...
... B. The probe will undergo constant acceleration until a force acts on it. C. The probe will continue on its current path until an unbalanced force acts on it. D. The force that makes the probe move through space is equal to its mass divided by its velocity. Justification--___________________________ ...
light year
... In the Universe, the kilometer is just too small to be useful. For example, the distance to the next nearest big galaxy, the Andromeda Galaxy, is 21 quintillion km. That's21,000,000,000, 000,000,000 km. This is a number so large that it becomes hard to write and hard to interpret. So astronomers us ...
... In the Universe, the kilometer is just too small to be useful. For example, the distance to the next nearest big galaxy, the Andromeda Galaxy, is 21 quintillion km. That's21,000,000,000, 000,000,000 km. This is a number so large that it becomes hard to write and hard to interpret. So astronomers us ...
Sample - Physics @ IUPUI
... • D) stops spinning 11) What are pulsars? • A) rapidly spinning neutron stars • B) rapidly spinning black holes • C) stars that change temperature rapidly • D) stars that change size rapidly 12) Where does the energy that pulsars emit come from? • A) heat • B) fusion • C) gravity • D) spin 13) If we ...
... • D) stops spinning 11) What are pulsars? • A) rapidly spinning neutron stars • B) rapidly spinning black holes • C) stars that change temperature rapidly • D) stars that change size rapidly 12) Where does the energy that pulsars emit come from? • A) heat • B) fusion • C) gravity • D) spin 13) If we ...
Indoor lab #1: The Hertzsprung-Russel Diagram and Selection Effects
... a) the average distance of all the stars in your table: b) the number of and average distance of the red giant stars (stars of type 1) c) the number of and average distance of the bluer main sequence stars (stars of type 2) d) the number of and average distance of the redder main sequence stars (sta ...
... a) the average distance of all the stars in your table: b) the number of and average distance of the red giant stars (stars of type 1) c) the number of and average distance of the bluer main sequence stars (stars of type 2) d) the number of and average distance of the redder main sequence stars (sta ...
Galaxy - Bama.ua.edu
... Cepheids • The graph shows magnitudes of 20 day Classical Cepheids if they were at 10 pc (~33 lyr), -5. • Hubble found M31’s 20 day Classical Cepheid apparent magnitudes are +20. • 1010 times less intense. • 3x106 lyr Math details 33 ly x √(1010 ) reversing the inverse square law. ...
... Cepheids • The graph shows magnitudes of 20 day Classical Cepheids if they were at 10 pc (~33 lyr), -5. • Hubble found M31’s 20 day Classical Cepheid apparent magnitudes are +20. • 1010 times less intense. • 3x106 lyr Math details 33 ly x √(1010 ) reversing the inverse square law. ...
1. What is parallax? What unit is it measured in? 1a. Parallax is the
... 4. Stars A, B, C, D have parallaxes of 2, 1, 0.5, 0.1 arcseconds. What are their distances? Get the units of this distance right. 4a. The distances are respectively, 0.5, 1, 2 and 10 parsecs respectively. 5. So if I halve the parallax angle of a star, what happens to its distance? 5a. It doubles. 6. ...
... 4. Stars A, B, C, D have parallaxes of 2, 1, 0.5, 0.1 arcseconds. What are their distances? Get the units of this distance right. 4a. The distances are respectively, 0.5, 1, 2 and 10 parsecs respectively. 5. So if I halve the parallax angle of a star, what happens to its distance? 5a. It doubles. 6. ...
How long does it take light to travel from the Moon to the Earth, a L
... Suppose the par?cles in the Earth’s atmosphere scaQered red light effec?vely, but not blue light. Which of the following would be true, which false? ____ The daylight sky looking away from the Sun wou ...
... Suppose the par?cles in the Earth’s atmosphere scaQered red light effec?vely, but not blue light. Which of the following would be true, which false? ____ The daylight sky looking away from the Sun wou ...
Deducing Temperatures and Luminosities of Stars
... distances • Example: Sun vs. α Cen – spectra are very similar ⇒ temperatures, radii almost identical (T follows from Planck function, radius R can be deduced by other means) – ⇒ luminosities about equal – difference in apparent magnitudes translates to relative distances – Can check using the parall ...
... distances • Example: Sun vs. α Cen – spectra are very similar ⇒ temperatures, radii almost identical (T follows from Planck function, radius R can be deduced by other means) – ⇒ luminosities about equal – difference in apparent magnitudes translates to relative distances – Can check using the parall ...
The Fate of Massive Stars
... Responsible for Type II,Ib and Ic Onion-like structure of interior of star develops Silicon Burning occurs once temperatures exceed 3 x 109 K ...
... Responsible for Type II,Ib and Ic Onion-like structure of interior of star develops Silicon Burning occurs once temperatures exceed 3 x 109 K ...
Earth in the Solar System (Earth Science) 12% 7 Items Test Prep
... AU=1.496X1011meters. Distances between planets of the solar system are usually expressed in AU. For distances between stars and galaxies, even that large unit of length is not sufficient. Interstellar and intergalactic distances are expressed in terms of how far light travels in one year. 1 light ye ...
... AU=1.496X1011meters. Distances between planets of the solar system are usually expressed in AU. For distances between stars and galaxies, even that large unit of length is not sufficient. Interstellar and intergalactic distances are expressed in terms of how far light travels in one year. 1 light ye ...
Slide 1
... Stellar Magnitude (brightness) Magnitude is the degree of brightness of a star. In 1856, British astronomer Norman Pogson proposed a quantitative scale of stellar magnitudes, which was adopted by the astronomical community. Each increment in magnitude corresponds to an increase in the amount of ene ...
... Stellar Magnitude (brightness) Magnitude is the degree of brightness of a star. In 1856, British astronomer Norman Pogson proposed a quantitative scale of stellar magnitudes, which was adopted by the astronomical community. Each increment in magnitude corresponds to an increase in the amount of ene ...
Chapter 25 - OG
... Are visible ALL YEAR LONG Other constellations come and go in the sky due to Earth’s revolution around Sun. ...
... Are visible ALL YEAR LONG Other constellations come and go in the sky due to Earth’s revolution around Sun. ...
10.1 The Solar Neighborhood Barnard`s Star
... 10.7 Stellar Masses -Most stars are in binary pairs -determine mass by measuring orbital motion -visual binaries observed directly -spectroscopic binaries measured by doppler effect -eclipsing binaries can be measured using intensity variations ...
... 10.7 Stellar Masses -Most stars are in binary pairs -determine mass by measuring orbital motion -visual binaries observed directly -spectroscopic binaries measured by doppler effect -eclipsing binaries can be measured using intensity variations ...
Astronomy Campus Assessment
... Scientists measure the movement of distant galaxies to learn more about the origin of the universe. You researched scientific data that showed that light from a distant galaxy is red-shifted. How would you evaluate the data? A. It indicates that the expansion of the universe has stopped, and so it d ...
... Scientists measure the movement of distant galaxies to learn more about the origin of the universe. You researched scientific data that showed that light from a distant galaxy is red-shifted. How would you evaluate the data? A. It indicates that the expansion of the universe has stopped, and so it d ...
Sample Exam Questions
... a) red supergiant b) black hole c) pulsar d) all pull equally 30. Which of the following exists almost exclusively in the halo of the Milky Way? a) globular star clusters b) open star clusters c) stellar associations d) cold gas and dust clouds 31. A galaxy that has just a little dust, but lots of r ...
... a) red supergiant b) black hole c) pulsar d) all pull equally 30. Which of the following exists almost exclusively in the halo of the Milky Way? a) globular star clusters b) open star clusters c) stellar associations d) cold gas and dust clouds 31. A galaxy that has just a little dust, but lots of r ...
Characteristics of Stars - Laconia School District
... Hertzsprung in Denmark and Henry Norris Russell in the United States, they made these graphs to find out if the temperature and the absolute brightness of the stars related. This was called the Hertzsprung- Russell Diagram. ...
... Hertzsprung in Denmark and Henry Norris Russell in the United States, they made these graphs to find out if the temperature and the absolute brightness of the stars related. This was called the Hertzsprung- Russell Diagram. ...
Hubblecast 70: Peering around cosmic corners Visual notes 00:00
... As a result, this massive object, or rather the curved space around it produced by its gravity, acts like a lens; a gravitational lens that deflects light into our telescopes that would have otherwise never made it there. ...
... As a result, this massive object, or rather the curved space around it produced by its gravity, acts like a lens; a gravitational lens that deflects light into our telescopes that would have otherwise never made it there. ...
chapter 28 pages 747-752
... • 1. nebula- cloud of gas and dust • 2. Rotation causes formation of protostar • 3. Once it is hot enough for H to fuse into He, main sequence stage occurs • This is the longest stage of a stars life. • 4. In medium sized stars, once all H has been fused into He, He then starts to fuse into C during ...
... • 1. nebula- cloud of gas and dust • 2. Rotation causes formation of protostar • 3. Once it is hot enough for H to fuse into He, main sequence stage occurs • This is the longest stage of a stars life. • 4. In medium sized stars, once all H has been fused into He, He then starts to fuse into C during ...
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.