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Chapter 15 Test Study Sheet
... Know the theory of how stars and our solar system were formed. b. Students know that the Sun is one of many stars in the Milky Way galaxy and that stars may differ in size, temperature, and color. Know that the Milky Way is one of many galaxies and that it is the one that the Sun and the Earth a ...
... Know the theory of how stars and our solar system were formed. b. Students know that the Sun is one of many stars in the Milky Way galaxy and that stars may differ in size, temperature, and color. Know that the Milky Way is one of many galaxies and that it is the one that the Sun and the Earth a ...
Lecture 13
... The nearby star 'Sirius A' has a surface temperature T~10,000 K and a flux of arriving radiation at Earth (integrated over all wavelengths) of : ...
... The nearby star 'Sirius A' has a surface temperature T~10,000 K and a flux of arriving radiation at Earth (integrated over all wavelengths) of : ...
Read
... the hottest to coolest, also from blue to red color, the types are: O, B, A, F, G, K, M. A second number is added for finer classification, like G0, G1, G2, …, G9. A blue star is hotter than a yellow star, which is hotter than a red star. The apparent magnitude of a star can be directly measured, be ...
... the hottest to coolest, also from blue to red color, the types are: O, B, A, F, G, K, M. A second number is added for finer classification, like G0, G1, G2, …, G9. A blue star is hotter than a yellow star, which is hotter than a red star. The apparent magnitude of a star can be directly measured, be ...
Simulating Gravitational Attraction Activity
... d) Does this agree with the fact that Jupiter takes almost 12 times longer than the Earth to go once around the sun? e) In galaxies, the stars further from the galactic center spin with about the same tangential velocity as those closer in, make this apparatus demonstrate this. How can you do this? ...
... d) Does this agree with the fact that Jupiter takes almost 12 times longer than the Earth to go once around the sun? e) In galaxies, the stars further from the galactic center spin with about the same tangential velocity as those closer in, make this apparatus demonstrate this. How can you do this? ...
THE METER STICK MODEL OF THE SOLAR SYSTEM
... The average distance between the Earth and Sun is called an Astronomical Unit or AU. In the meter stick model, one AU is one inch. There are about 63,240 AU in one light- year. There are 63,360 inches in one mile. Because these are almost the same, we can extend our meter stick model solar system t ...
... The average distance between the Earth and Sun is called an Astronomical Unit or AU. In the meter stick model, one AU is one inch. There are about 63,240 AU in one light- year. There are 63,360 inches in one mile. Because these are almost the same, we can extend our meter stick model solar system t ...
Document
... • Parallax is denoted by ‘p’. • Distance (d) is measured in parsec. • d = 1 parsec = the distance at which a star has a parallax (p) of 1 arc second. 1 parsec = 3.26 light years. Also d = 1/p Closest star, Proxima centauri, p = 0.772 arc seconds. Hence distance ‘d’ in parsec is d = 1/p = 1/0.77 ...
... • Parallax is denoted by ‘p’. • Distance (d) is measured in parsec. • d = 1 parsec = the distance at which a star has a parallax (p) of 1 arc second. 1 parsec = 3.26 light years. Also d = 1/p Closest star, Proxima centauri, p = 0.772 arc seconds. Hence distance ‘d’ in parsec is d = 1/p = 1/0.77 ...
NIE10x301Sponsor Thank You (Page 1)
... to use “cee” to express three different units of astronomical parsec” away. “Parsec” comes from “parallax of distance measurement: an Astronomical Unit, a Light Year, one arcsecond”. This unit of measurement is and a Parsec. equal to 3.26 light-years or 30.8 trillion km. So, Considering that the spe ...
... to use “cee” to express three different units of astronomical parsec” away. “Parsec” comes from “parallax of distance measurement: an Astronomical Unit, a Light Year, one arcsecond”. This unit of measurement is and a Parsec. equal to 3.26 light-years or 30.8 trillion km. So, Considering that the spe ...
How the quasars (lower right) are different than brown dwarfs
... around about 5 to 12 micron, these are caused by so-called polycyclic aromatic hydrocarbons (PAHs), which are a class of organic molecules. They give important clues towards the structures of dust in galaxies, star formation, and the merger histories of galaxies. ...
... around about 5 to 12 micron, these are caused by so-called polycyclic aromatic hydrocarbons (PAHs), which are a class of organic molecules. They give important clues towards the structures of dust in galaxies, star formation, and the merger histories of galaxies. ...
Measuring Distances
... Ultimately, knowing distances across the Universe also allow us to determine the Universe’s age. While distance is so critical in astronomy, it is also one of the most difficult things to measure. Fortunately, Greek astronomers imagined a method 2000 years ago that is still in use today. ...
... Ultimately, knowing distances across the Universe also allow us to determine the Universe’s age. While distance is so critical in astronomy, it is also one of the most difficult things to measure. Fortunately, Greek astronomers imagined a method 2000 years ago that is still in use today. ...
Lecture 12
... We can directly observe the orbital motions of these stars. We can only see visual binaries if they are very near Earth. ...
... We can directly observe the orbital motions of these stars. We can only see visual binaries if they are very near Earth. ...
Stars, Galaxies, and the Universe
... • A white dwarf is is a star that has used up all of its hydrogen and is the leftover center of an older star. • Class F stars are yellow-white • The majority of stars in our galaxy are main sequence stars. ...
... • A white dwarf is is a star that has used up all of its hydrogen and is the leftover center of an older star. • Class F stars are yellow-white • The majority of stars in our galaxy are main sequence stars. ...
Structure of the Universe
... by combining smaller elements to form a larger one, specifically two hydrogen atoms form a helium atom, ...
... by combining smaller elements to form a larger one, specifically two hydrogen atoms form a helium atom, ...
Astronomy 115 Homework Set #1 – Due: Thursday, Feb
... 1. What is the average density of the Sun? How does this compare with the average density of Jupiter? 2. How many hydrogen atoms are converted to helium each second in order to power the Sun’s luminosity? To arrive at the solution, answer the following: (a) What is the mass of 4 hydrogen atoms? (b) ...
... 1. What is the average density of the Sun? How does this compare with the average density of Jupiter? 2. How many hydrogen atoms are converted to helium each second in order to power the Sun’s luminosity? To arrive at the solution, answer the following: (a) What is the mass of 4 hydrogen atoms? (b) ...
Astronomy Galaxies & The Universe
... 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 ...
Stars Part 2 - westscidept
... light-years away from Earth. • The absolute magnitude of the sun is +4.8. But because the sun is so close to Earth, its apparent magnitude is -26.8, which makes it the brightest object in the sky. ...
... light-years away from Earth. • The absolute magnitude of the sun is +4.8. But because the sun is so close to Earth, its apparent magnitude is -26.8, which makes it the brightest object in the sky. ...
Stellar Brightness Apparent magnitude
... What if we could line up all the stars the same distance away to do a fair test for their brightness? This is what astronomers do with the Absolute Magnitude scale They ‘pretend’ to line up the stars exactly 10 parsecs (32.6 l.y.)away and figure out how bright each start would look ...
... What if we could line up all the stars the same distance away to do a fair test for their brightness? This is what astronomers do with the Absolute Magnitude scale They ‘pretend’ to line up the stars exactly 10 parsecs (32.6 l.y.)away and figure out how bright each start would look ...
Document
... a. The latter has a diameter of almost two billion miles. b. If you counted one star a second it would take you more than thirty thousand years to count 100 billion. c. But, during your lifetime, as always, new stars are being crated. d. The solar system is located in the Milky Way Galaxy. e. Stars ...
... a. The latter has a diameter of almost two billion miles. b. If you counted one star a second it would take you more than thirty thousand years to count 100 billion. c. But, during your lifetime, as always, new stars are being crated. d. The solar system is located in the Milky Way Galaxy. e. Stars ...
Stars are classified by how hot they are (temperature)
... Norris Russell made similar graphs Although they used different data, they came up with the same graphs Hertzsprung-Russell (H-R) diagram ...
... Norris Russell made similar graphs Although they used different data, they came up with the same graphs Hertzsprung-Russell (H-R) diagram ...
Scale of the Cosmos ppt.
... The Universe- the largest SYSTEM What is the Universe? How large is the universe? How many galaxies are in the universe? ...
... The Universe- the largest SYSTEM What is the Universe? How large is the universe? How many galaxies are in the universe? ...
Coursework 7 File
... The giant planet has a radius, Rp , that is twice Jupiter’s radius and a surface temperature T = 1500 K. Estimate the ratios of the luminosities emitted by the central star and the planet: (i) between wavelengths 500-510 nm; (ii) between wavelengths 2000-2010 nm. Based on your answers, what approach ...
... The giant planet has a radius, Rp , that is twice Jupiter’s radius and a surface temperature T = 1500 K. Estimate the ratios of the luminosities emitted by the central star and the planet: (i) between wavelengths 500-510 nm; (ii) between wavelengths 2000-2010 nm. Based on your answers, what approach ...
UNIVERSITY OF SOUTHAMPTON PHYS2013W1 SEMESTER 1
... b) For a giant elliptical galaxy, the wavelength of its Hα line in the observedframe is measured at 659.6 nm with a line width of 0.5 nm. The rest-frame wavelength of the line is at Hα,0 = 656.3 nm. Assuming that the galaxy has no peculiar velocity, show that the galaxy is located at a distance of 2 ...
... b) For a giant elliptical galaxy, the wavelength of its Hα line in the observedframe is measured at 659.6 nm with a line width of 0.5 nm. The rest-frame wavelength of the line is at Hα,0 = 656.3 nm. Assuming that the galaxy has no peculiar velocity, show that the galaxy is located at a distance of 2 ...
Faux Final
... 9) Sketch a top view and a side view of the Milky Way galaxy. What are the rough distance scales? Label nucleus, bulge, and halo in the spheroid and disk. Illustrate spiral arms. Note the approximate position of the solar system. 10) Make a table of disk vs. spheroid for the Milky Way or other galax ...
... 9) Sketch a top view and a side view of the Milky Way galaxy. What are the rough distance scales? Label nucleus, bulge, and halo in the spheroid and disk. Illustrate spiral arms. Note the approximate position of the solar system. 10) Make a table of disk vs. spheroid for the Milky Way or other galax ...
Word
... percent in a specific time period, and “n” is the total number of those periods that have elapsed. For example, "Moore's law" is the empirical observation that, over the history of modern computer technology, the number of transistors in an integrated circuit doubles approximately every two years. U ...
... percent in a specific time period, and “n” is the total number of those periods that have elapsed. For example, "Moore's law" is the empirical observation that, over the history of modern computer technology, the number of transistors in an integrated circuit doubles approximately every two years. U ...
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.