Clusters of Galaxies
... Supernovae Type Ia (SN Ia) are “special”. They are probably white dwarf stars with a giant companion that is providing material to the white dwarf. Once the WD accretes a mass of 1.4 M⊙, it explodes as it becomes a neutron star. Because SN Ia all have a common progenitor, they likely have similar p ...
... Supernovae Type Ia (SN Ia) are “special”. They are probably white dwarf stars with a giant companion that is providing material to the white dwarf. Once the WD accretes a mass of 1.4 M⊙, it explodes as it becomes a neutron star. Because SN Ia all have a common progenitor, they likely have similar p ...
Measuring the Age of the Universe
... Make a Paper Tape Solar System(cont)! • Assume 5 meters is distance from Jupiter to Sun (= 5 “AU’s” Earth is at 1 AU -- the Sun is at one end, Jupiter at other. 1 AU = 1 meter is the distance from the sun to the earth. • Without thinking, search your heart and emotions for the best size circle (dra ...
... Make a Paper Tape Solar System(cont)! • Assume 5 meters is distance from Jupiter to Sun (= 5 “AU’s” Earth is at 1 AU -- the Sun is at one end, Jupiter at other. 1 AU = 1 meter is the distance from the sun to the earth. • Without thinking, search your heart and emotions for the best size circle (dra ...
Distances in space
... same scale to map the nearest star to earth you would have to use a larger reference scale because the distances are so great. For instance it is approximately 4 light years to the nearest star to our solar system. Given that a light year is approximately 63,255 AU's the distance would be (63,255 x ...
... same scale to map the nearest star to earth you would have to use a larger reference scale because the distances are so great. For instance it is approximately 4 light years to the nearest star to our solar system. Given that a light year is approximately 63,255 AU's the distance would be (63,255 x ...
Document
... Hubble and expansion • Cepheid variables proved that some galaxies were far way (recognized by variability and VERY luminous). • By 1929, the expansion of the Universe was known, clearly separating galaxies from Galactic nebulae. • Note: it was known that Galactic nebulae had emisson spectra and ga ...
... Hubble and expansion • Cepheid variables proved that some galaxies were far way (recognized by variability and VERY luminous). • By 1929, the expansion of the Universe was known, clearly separating galaxies from Galactic nebulae. • Note: it was known that Galactic nebulae had emisson spectra and ga ...
ASTR 100: Homework 1 Solutions McGaugh, Fall 2008
... ‘best?’ If we can agree on that, and can define a quantitative way to measure it, then we can turn this assertion into something accessible to science. Agreeing on what we mean by ‘best’ is not simple, which is why scientists prefer more specific, limited language. “The Yankees have been the most su ...
... ‘best?’ If we can agree on that, and can define a quantitative way to measure it, then we can turn this assertion into something accessible to science. Agreeing on what we mean by ‘best’ is not simple, which is why scientists prefer more specific, limited language. “The Yankees have been the most su ...
AST 301 Introduction to Astronomy - University of Texas Astronomy
... Since distance α 1 / parallax, Spica must be at twice the distance of Canopus. (The numbers are 100 pc and 200 pc, but you don’t need to know that.) The more distant star (Spica) appears fainter. Since it is twice as distant as Canopus, it appears 4 times fainter, or ¼ as bright. We could use the ma ...
... Since distance α 1 / parallax, Spica must be at twice the distance of Canopus. (The numbers are 100 pc and 200 pc, but you don’t need to know that.) The more distant star (Spica) appears fainter. Since it is twice as distant as Canopus, it appears 4 times fainter, or ¼ as bright. We could use the ma ...
level 1
... used in astronomy. Create an infographic for museum visitors that shows these distances in terms that make sense to them. Design an Excel spreadsheet to prepare the data, using the distances provided in Stellar Performance. Create two new columns and apply the appropriate formulae to convert distanc ...
... used in astronomy. Create an infographic for museum visitors that shows these distances in terms that make sense to them. Design an Excel spreadsheet to prepare the data, using the distances provided in Stellar Performance. Create two new columns and apply the appropriate formulae to convert distanc ...
Doppler Effect • The Doppler Effect is the change in frequency
... Light from a distant galaxy is found to contain the spectral lines of hydrogen. One line has a wavelength measured as 466 nm. When the same line is observed from a hydrogen source on Earth it has a wavelength of 434 nm. a) Calculate the extent of redshift, z, for this galaxy. b) Calculate the speed ...
... Light from a distant galaxy is found to contain the spectral lines of hydrogen. One line has a wavelength measured as 466 nm. When the same line is observed from a hydrogen source on Earth it has a wavelength of 434 nm. a) Calculate the extent of redshift, z, for this galaxy. b) Calculate the speed ...
Lab 9
... How accurate were you? Is the criterion or criteria you used a good way to find galaxy distances? ...
... How accurate were you? Is the criterion or criteria you used a good way to find galaxy distances? ...
Chapter 15 Stars, Galaxies
... 2. binary stars 3. a, d 4. eclipsing binary 5. They observed the effects of the planet’s gravity on the star. 6. Any small planets would be hard to detect because their gravitational effect on their star would be quite small. 7. open cluster 8. globular cluster ...
... 2. binary stars 3. a, d 4. eclipsing binary 5. They observed the effects of the planet’s gravity on the star. 6. Any small planets would be hard to detect because their gravitational effect on their star would be quite small. 7. open cluster 8. globular cluster ...
Planetarium Activity 1 Learning to measure brightness and Limiting
... 1. You will be shown five popular constellations (Ursa Major, Cassiopeia, Leo, Ursa Minor and Orion) fix their position in the sky when the lights are off so that its approximated location can be found as the lights brighten. Use dots to Sketch the constellations on your worksheet and connect the st ...
... 1. You will be shown five popular constellations (Ursa Major, Cassiopeia, Leo, Ursa Minor and Orion) fix their position in the sky when the lights are off so that its approximated location can be found as the lights brighten. Use dots to Sketch the constellations on your worksheet and connect the st ...
RMH_Stellar_Evolution_Ast2001_09_29_09
... One of the Largest -- The Extreme Red Supergiant VY CMa 10 arcsec ...
... One of the Largest -- The Extreme Red Supergiant VY CMa 10 arcsec ...
word document - FacStaff Home Page for CBU
... Study TRUE/FALSE Questions for all of Part 5: (questions similar to these may be on the test) _____a) We appear to be orbiting the center of the Milky Way galaxy with a speed of about 500,000 mph (about means within a factor of 5). _____b) The Andromeda galaxy is a galaxy very much like our own and ...
... Study TRUE/FALSE Questions for all of Part 5: (questions similar to these may be on the test) _____a) We appear to be orbiting the center of the Milky Way galaxy with a speed of about 500,000 mph (about means within a factor of 5). _____b) The Andromeda galaxy is a galaxy very much like our own and ...
Homework 5 (stellar properties)
... 2. (2 pts.) What does luminosity measure that is different from what absolute visual magnitude measures? ...
... 2. (2 pts.) What does luminosity measure that is different from what absolute visual magnitude measures? ...
Astro 10 Practice Test 3
... Choose the ONE best answer and mark it on your Parscore form. 10. The Sun is currently undergoing mass loss. What do we call the physical manifestation of this process? a. Sunspots b. The solar wind c. The Sun’s photosphere d. The Sun’s chromosphere 11. What special type of stellar remnant did Zwick ...
... Choose the ONE best answer and mark it on your Parscore form. 10. The Sun is currently undergoing mass loss. What do we call the physical manifestation of this process? a. Sunspots b. The solar wind c. The Sun’s photosphere d. The Sun’s chromosphere 11. What special type of stellar remnant did Zwick ...
Activity 1: The Scientific Method
... 1) Start by becoming aware of your own biases. Do you believe any of the data is correlated? If so how? Relationship Example: radial motion of the stars and temperature Should state relationships that you believe might exist ...
... 1) Start by becoming aware of your own biases. Do you believe any of the data is correlated? If so how? Relationship Example: radial motion of the stars and temperature Should state relationships that you believe might exist ...
Day_2
... get to the nearest big galaxy. • 10 billion+ years to come from distant galaxies. • This can make studying objects difficult. ...
... get to the nearest big galaxy. • 10 billion+ years to come from distant galaxies. • This can make studying objects difficult. ...
W > 1 - The Open University
... Delta () Cephei. +3.5 to +4.4, period 5.37 days. The prototype for the Cepheid class of variable stars. Their period-luminosity relationship has lead them to being used as “standard candles” in measuring distances to nearby galaxies. Maximum brightness occurs on 4th, 9th, 14th, 20th, 25th and 30th. ...
... Delta () Cephei. +3.5 to +4.4, period 5.37 days. The prototype for the Cepheid class of variable stars. Their period-luminosity relationship has lead them to being used as “standard candles” in measuring distances to nearby galaxies. Maximum brightness occurs on 4th, 9th, 14th, 20th, 25th and 30th. ...
AST 301 Introduction to Astronomy - University of Texas Astronomy
... It might be infinitely large. The most distant object we can see is about 14,000,000,000 light-years away (or was when the light left it 14,000,000,000 years ago. That’s more than 1,000 times as far away as the Andromeda Galaxy. We can’t see anything more distant because the Universe has only existe ...
... It might be infinitely large. The most distant object we can see is about 14,000,000,000 light-years away (or was when the light left it 14,000,000,000 years ago. That’s more than 1,000 times as far away as the Andromeda Galaxy. We can’t see anything more distant because the Universe has only existe ...
Astronomy 10B List of Concepts– by Chapter
... • How do we Measure the rotation rate of stars? • How do we Measure the magnetic fields of stars? • How were spectral type letters originally assigned (strength of H lines) • How are letters now assigned (types of spectral lines) • Spectral types and temperature (which is hottest, coolest?) • Spectr ...
... • How do we Measure the rotation rate of stars? • How do we Measure the magnetic fields of stars? • How were spectral type letters originally assigned (strength of H lines) • How are letters now assigned (types of spectral lines) • Spectral types and temperature (which is hottest, coolest?) • Spectr ...
Galaxies and the Universe
... Galaxies • Are made up of BILLIONS of stars, planets, gas and dust • Held together by gravity • 3 basic kinds ...
... Galaxies • Are made up of BILLIONS of stars, planets, gas and dust • Held together by gravity • 3 basic kinds ...
P2_5 The Apparent Magnitude of α Orionis Supernova
... Betelgeuse (α Orionis) is a red supergiant in the constellation Orion and is expected to become a type II supernova [1,5]. When this star becomes a supernova, it will radiate far more light and will become brighter in the night sky. This paper contains an investigation into the prospect of being abl ...
... Betelgeuse (α Orionis) is a red supergiant in the constellation Orion and is expected to become a type II supernova [1,5]. When this star becomes a supernova, it will radiate far more light and will become brighter in the night sky. This paper contains an investigation into the prospect of being abl ...
Success Criteria Space
... I can differentiate between the life span of a massive, intermediate and low mass star I can describe the differences between the end of the life of a massive, intermediate and low mass star I understand how the Doppler Effect causes a red shift or blue shift ...
... I can differentiate between the life span of a massive, intermediate and low mass star I can describe the differences between the end of the life of a massive, intermediate and low mass star I understand how the Doppler Effect causes a red shift or blue shift ...
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.