Photometry
... Now you are ready to find the apparent B and V magnitudes. Move to one of the stars indicated on the data sheet on the following page. You may use the monitor / change view button to navigate the area in finder mode. Switch back to photometer / instrument mode before taking your readings. Make sure ...
... Now you are ready to find the apparent B and V magnitudes. Move to one of the stars indicated on the data sheet on the following page. You may use the monitor / change view button to navigate the area in finder mode. Switch back to photometer / instrument mode before taking your readings. Make sure ...
Lesson 2 Power Notes Outline
... When astronomers use the word luminosity, they mean the actual brightness of a star. They measure it on a scale called absolute magnitude. ...
... When astronomers use the word luminosity, they mean the actual brightness of a star. They measure it on a scale called absolute magnitude. ...
Time traveller – Activity
... communicating over the large distances involved in astronomy. It takes time for light to reach us from a distant star so when we look at the night sky, we are looking into the past. For example, we see the star Sirius as it was 9 years ago. Since radio signals also travel at the speed of light, this ...
... communicating over the large distances involved in astronomy. It takes time for light to reach us from a distant star so when we look at the night sky, we are looking into the past. For example, we see the star Sirius as it was 9 years ago. Since radio signals also travel at the speed of light, this ...
Astro 1 & 100 Levine Homework Stars Name:____________________________
... 1. Rank these stars in order of luminosity, from brightest to dimmest : Brightest ______ ______ ______ ______ ______ ______ Dimmest Or, all have the same luminosity ______________ 2. Rank these stars in order of apparent brightness, from brightest to dimmest: Brightest ______ ______ ______ ______ __ ...
... 1. Rank these stars in order of luminosity, from brightest to dimmest : Brightest ______ ______ ______ ______ ______ ______ Dimmest Or, all have the same luminosity ______________ 2. Rank these stars in order of apparent brightness, from brightest to dimmest: Brightest ______ ______ ______ ______ __ ...
Deep Space Objects
... Large groups of older stars often collect together, via gravity and over time, into multi-hundred-thousand-star clumps called globular clusters. Like min- galaxies within galaxies, such clusters tend to orbit around the centre of our galaxy. There are about 150 globular clusters in the Milky Way. O ...
... Large groups of older stars often collect together, via gravity and over time, into multi-hundred-thousand-star clumps called globular clusters. Like min- galaxies within galaxies, such clusters tend to orbit around the centre of our galaxy. There are about 150 globular clusters in the Milky Way. O ...
This chapter has a brief overview of astronomical topics that we will
... The creation involved enormous energies heating the early cosmos with γ -rays. As space expanded this radiation was stretched (cooled) until now it would be mere microwave static. Penzias and Wilson observed this microwave background radiation in the 1960's. The snow or static you see on unused (non ...
... The creation involved enormous energies heating the early cosmos with γ -rays. As space expanded this radiation was stretched (cooled) until now it would be mere microwave static. Penzias and Wilson observed this microwave background radiation in the 1960's. The snow or static you see on unused (non ...
Galaxy Characteristics
... Vsys = velocity of galaxy through space V(R) = velocity at radius R (rotation curve) i = tilt from perpindicular (i=0 face on) f = angle from motion towards/away This can be solve for the rotation curve ...
... Vsys = velocity of galaxy through space V(R) = velocity at radius R (rotation curve) i = tilt from perpindicular (i=0 face on) f = angle from motion towards/away This can be solve for the rotation curve ...
PROBLEM SET #9 SOLUTIONS AST142 1. Quasar luminosity
... is accreting at the Eddington rate, and show that these two findings are consistent with one another. ...
... is accreting at the Eddington rate, and show that these two findings are consistent with one another. ...
Worksheet: Stars and the HR Diagram
... Background: The Hertzsprung-Russell diagram is actually a graph that illustrates the relationship that exists between the average surface temperature of stars and their absolute magnitude, which is how bright they would appear to be if they were al the same distance away. Rather than speak of the br ...
... Background: The Hertzsprung-Russell diagram is actually a graph that illustrates the relationship that exists between the average surface temperature of stars and their absolute magnitude, which is how bright they would appear to be if they were al the same distance away. Rather than speak of the br ...
No Slide Title
... slower than others), we’ve been able to calibrate •Need to get extra mass onto WD => • Binary system ...
... slower than others), we’ve been able to calibrate •Need to get extra mass onto WD => • Binary system ...
stars - Chatt
... • An enormous explosion when a large star dies. • When all the hydrogen is used up the core collapses • The absence of pressure causes a neutron star or a black hole. • The explosion can be bright enough to see during the day! ...
... • An enormous explosion when a large star dies. • When all the hydrogen is used up the core collapses • The absence of pressure causes a neutron star or a black hole. • The explosion can be bright enough to see during the day! ...
EXERCISES: Set 2 of 4 Q1: The absolute magnitude of the Sun in
... Q1: The absolute magnitude of the Sun in the optical V band is MV = 4.8. The brightness of the night sky at a dark astronomical site is 22 magnitudes per square arcsec in the V band. (a) At what distances would: (i) a star like the Sun, (ii) a globular cluster, (iii) a galaxy like the Milky Way be a ...
... Q1: The absolute magnitude of the Sun in the optical V band is MV = 4.8. The brightness of the night sky at a dark astronomical site is 22 magnitudes per square arcsec in the V band. (a) At what distances would: (i) a star like the Sun, (ii) a globular cluster, (iii) a galaxy like the Milky Way be a ...
Microsoft Word 97
... 1. When did the Milky Way begin? _____________________________________________________ 2. Where does its name come from? ___________________________________________________ 3. What do we see when we look in the sky? _____________________________________________ 4. What does our galaxy look like from ...
... 1. When did the Milky Way begin? _____________________________________________________ 2. Where does its name come from? ___________________________________________________ 3. What do we see when we look in the sky? _____________________________________________ 4. What does our galaxy look like from ...
Astronomy Unit 4 Galaxies
... 36. The approximate age of the universe determined by using Hubble’s Constant. __________________________________ 37. The distribution of galaxies in the universe is not ___________________, but clusters of galaxies lie within structures called ___________________ which surround empty regions called ...
... 36. The approximate age of the universe determined by using Hubble’s Constant. __________________________________ 37. The distribution of galaxies in the universe is not ___________________, but clusters of galaxies lie within structures called ___________________ which surround empty regions called ...
PPT - Cornell University
... • As self-gravity decouples the protogalaxy from the Hubble flow, [l/(d l/d t)] becomes v.large and the growth of l ceases ...
... • As self-gravity decouples the protogalaxy from the Hubble flow, [l/(d l/d t)] becomes v.large and the growth of l ceases ...
Test #4
... a) too many stars, b) glowing interstellar gas, c) interstellar dust, d) planetary nebulae 13. The mass of the galaxy has been found by a) counting the stars it contains, b) determining its gravitational force on nearby galaxies c) estimating the number of interstellar clouds, d) applying Kepler’s 3 ...
... a) too many stars, b) glowing interstellar gas, c) interstellar dust, d) planetary nebulae 13. The mass of the galaxy has been found by a) counting the stars it contains, b) determining its gravitational force on nearby galaxies c) estimating the number of interstellar clouds, d) applying Kepler’s 3 ...
The Sun and the Solar System
... • D~d: different objects of the same size(?!), the further away, the larger(?!) Q: the Sun’s distance from Earth is about 400 times the Moon’s distance. How large is the Sun compared with the Moon? ...
... • D~d: different objects of the same size(?!), the further away, the larger(?!) Q: the Sun’s distance from Earth is about 400 times the Moon’s distance. How large is the Sun compared with the Moon? ...
Test - Hampton Science 8A 8B 8C 8D 8E Stars are classified on the
... Stars are classified on the Hertzsprung - Russell diagram according to their absolute magnitude and their surface temperatures at a given time in a star’s life cycle. What classification would a star have if it was very hot and very bright? ...
... Stars are classified on the Hertzsprung - Russell diagram according to their absolute magnitude and their surface temperatures at a given time in a star’s life cycle. What classification would a star have if it was very hot and very bright? ...
Sample Exam for Final (with correct answers)
... (c) an orbit with a big difference between closest approach and most distant (d) the Sun doesn’t orbit the galactic center, but instead the Orion Nebula (e) the Sun, like all stars, does not move in the Milky Way 6. What is roughly the typical distance between galaxies in our neighborhood? (a) 15 - ...
... (c) an orbit with a big difference between closest approach and most distant (d) the Sun doesn’t orbit the galactic center, but instead the Orion Nebula (e) the Sun, like all stars, does not move in the Milky Way 6. What is roughly the typical distance between galaxies in our neighborhood? (a) 15 - ...
printer-friendly sample test questions
... Based on apparent magnitude, the Sun is the brightest star (-26.40) and Deneb is the dimmest star (1.25). Absolute magnitude shows Rigel to be the brightest star (-8.61) and the Sun to be the dimmest star (4.80). Brightness of stars is traditionally expressed as magnitude. The more negative the valu ...
... Based on apparent magnitude, the Sun is the brightest star (-26.40) and Deneb is the dimmest star (1.25). Absolute magnitude shows Rigel to be the brightest star (-8.61) and the Sun to be the dimmest star (4.80). Brightness of stars is traditionally expressed as magnitude. The more negative the valu ...
Chapter 29 Notes
... Measuring Stars • Parallax is used to find the distance to stars • Constellations: Groups of stars in the same part of the sky • Clusters: groups of stars bound together by gravity • Binaries: two stars that orbit a common center of mass ...
... Measuring Stars • Parallax is used to find the distance to stars • Constellations: Groups of stars in the same part of the sky • Clusters: groups of stars bound together by gravity • Binaries: two stars that orbit a common center of mass ...
About the Universe The Universe is everything that exists, including
... Stars are made in swirling clouds called nebulas. Nebulas are made of gas and dust which bind together, pulled by gravity, to form gigantic, spinning balls. As the mass falls together it gets hot. A star is formed when it is hot enough for the hydrogen nuclei to fuse together to make helium. This nu ...
... Stars are made in swirling clouds called nebulas. Nebulas are made of gas and dust which bind together, pulled by gravity, to form gigantic, spinning balls. As the mass falls together it gets hot. A star is formed when it is hot enough for the hydrogen nuclei to fuse together to make helium. This nu ...
NIE10x301Sponsor Thank You (Page 1)
... The constellation Leo, rising in the east after dark in the Spring, is another rich hunting ground for galaxies; the Leo Group resides in space behind it, about 40 million ly distant. Two groups of galaxies are visible under the belly and haunches of the Lion; a star chart will help you. M65 and M66 ...
... The constellation Leo, rising in the east after dark in the Spring, is another rich hunting ground for galaxies; the Leo Group resides in space behind it, about 40 million ly distant. Two groups of galaxies are visible under the belly and haunches of the Lion; a star chart will help you. M65 and M66 ...
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.