![Module 4.1 - The Scale of the Universe [slide 1] We now turn to](http://s1.studyres.com/store/data/002846843_1-9e0ec9d1a2abbbab3c0d406694bfc4e2-300x300.png)
Module 4.1 - The Scale of the Universe [slide 1] We now turn to
... [slide 5] Ever since then, the value of the Hubble constant was revised, usually downward. The first major revision was due to Walter Baade who recognized that there are really two very different kinds of pulsating stars, one of which is confused for the other, and he came up with the concept of ste ...
... [slide 5] Ever since then, the value of the Hubble constant was revised, usually downward. The first major revision was due to Walter Baade who recognized that there are really two very different kinds of pulsating stars, one of which is confused for the other, and he came up with the concept of ste ...
Chapter 17--Star Stuff
... atoms to pair up to form hydrogen molecules (H2). The relatively rare atoms of elements heavier than helium can also form molecules, such as carbon monoxide or water, or tiny, solid grains of dust. More important, the cold temperatures and high densities allow gravity to overcome thermal pressure mo ...
... atoms to pair up to form hydrogen molecules (H2). The relatively rare atoms of elements heavier than helium can also form molecules, such as carbon monoxide or water, or tiny, solid grains of dust. More important, the cold temperatures and high densities allow gravity to overcome thermal pressure mo ...
Compare/Order Decimals
... B. 0.6 + 0.008 + 0.0007 Standard form: 0.6087 Word form: six thousand eighty-seven tenthousandths Course 1 ...
... B. 0.6 + 0.008 + 0.0007 Standard form: 0.6087 Word form: six thousand eighty-seven tenthousandths Course 1 ...
PH607lec12
... rate as middle-mass galaxies. When astronomers look at the brightest galaxies now compared to the brightest galaxies at an earlier epoch, they don't seem to have gained much mass. It suggests that there might be an upper ceiling to how large a galaxy can grow. Perhaps when a galaxy gets to be very l ...
... rate as middle-mass galaxies. When astronomers look at the brightest galaxies now compared to the brightest galaxies at an earlier epoch, they don't seem to have gained much mass. It suggests that there might be an upper ceiling to how large a galaxy can grow. Perhaps when a galaxy gets to be very l ...
24.1 Hubble`s Galaxy Classification
... The Tully–Fisher relation correlates a galaxy’s rotation speed (which can be measured using the Doppler effect) to its luminosity. In hindsight this makes sense, since faster rotation means more galaxy mass, means (on average) a more luminous galaxy. In the example below the Galaxy is spatially reso ...
... The Tully–Fisher relation correlates a galaxy’s rotation speed (which can be measured using the Doppler effect) to its luminosity. In hindsight this makes sense, since faster rotation means more galaxy mass, means (on average) a more luminous galaxy. In the example below the Galaxy is spatially reso ...
SherwoodWA_1973redux - Edinburgh Research Archive
... which have been adapted for this thesis by Herr W. David Cooper and ...
... which have been adapted for this thesis by Herr W. David Cooper and ...
Celebrating Astronomy: The Life of a Star
... http://www.compadre.org/Astronomy Hubble Space Telescope http://hubblesite.org International Year of Astronomy 2009 http://astronomy2009.us http://astronomy2009.org ...
... http://www.compadre.org/Astronomy Hubble Space Telescope http://hubblesite.org International Year of Astronomy 2009 http://astronomy2009.us http://astronomy2009.org ...
WHAT MAKES A STAR SO SPECIAL Abstract
... luminosity, or 1000 red stars from class M with low luminosity. This statistics shows that the formation of stars with low masses is a very common process. If we plot the spectral classes (or the temperature, which is the same) along the x-axis and the luminosity (or stars’ absolute magnitude) along ...
... luminosity, or 1000 red stars from class M with low luminosity. This statistics shows that the formation of stars with low masses is a very common process. If we plot the spectral classes (or the temperature, which is the same) along the x-axis and the luminosity (or stars’ absolute magnitude) along ...
Activity III: Calibrating Images
... that has traveled vast distances. Amazingly, the light remains virtually unaffected by the first 99.999999999999% or so of its journey. However, in the trip through the Earth’s atmosphere, and even through the optics of the telescope, the light may finally be affected causing the brightness of the s ...
... that has traveled vast distances. Amazingly, the light remains virtually unaffected by the first 99.999999999999% or so of its journey. However, in the trip through the Earth’s atmosphere, and even through the optics of the telescope, the light may finally be affected causing the brightness of the s ...
Homework #3, AST 1002
... (a) Their absolute magnitude depends on their period. (b) They are found in the galactic plane. (c) They pulse with periods of about one day or less. The correct answer(s) is(are) ____________. 16. Which of the following is (are) correct? (a) White dwarfs contain a super conducting material. (b) Ura ...
... (a) Their absolute magnitude depends on their period. (b) They are found in the galactic plane. (c) They pulse with periods of about one day or less. The correct answer(s) is(are) ____________. 16. Which of the following is (are) correct? (a) White dwarfs contain a super conducting material. (b) Ura ...
July - Antelope Valley Astronomy Club
... The Solstice has passed. Welcome to summer folks. We’re on the backside of the year and the days will now start getting shorter. As I’m writing this column, it’s International SUNday and many groups throughout the world are holding outreach activities to share the sun with the public. Rose and I had ...
... The Solstice has passed. Welcome to summer folks. We’re on the backside of the year and the days will now start getting shorter. As I’m writing this column, it’s International SUNday and many groups throughout the world are holding outreach activities to share the sun with the public. Rose and I had ...
Do We Know of Any Maunder Minimum Stars?
... noted that such subgiants appear to have high Ca II H & K line core emission independent of their rotation, unlike subgiants with B −V > 0.55. ...
... noted that such subgiants appear to have high Ca II H & K line core emission independent of their rotation, unlike subgiants with B −V > 0.55. ...
Mergers of massive main sequence binaries
... with the assumption of no mass loss and homogeneous mixing during the merging process. We find that there are two types of mergers which result from different phases of mass transfer. Both of these types have relatively low hydrogen content which leads to high luminosities. We then used the data of ...
... with the assumption of no mass loss and homogeneous mixing during the merging process. We find that there are two types of mergers which result from different phases of mass transfer. Both of these types have relatively low hydrogen content which leads to high luminosities. We then used the data of ...
PPT presentation
... luminosity functions, indistinguishable from those observed in the spiral galaxies M31 and M81. The invariance with galaxy type and metallicity demonstrated the PNLF to be an excellent standard candle. Model simulations indicated a central star mass distribution highly peaked at ~0.6 Msun, similar t ...
... luminosity functions, indistinguishable from those observed in the spiral galaxies M31 and M81. The invariance with galaxy type and metallicity demonstrated the PNLF to be an excellent standard candle. Model simulations indicated a central star mass distribution highly peaked at ~0.6 Msun, similar t ...
Cassiopeia (constellation)
Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty. Cassiopeia was one of the 48 constellations listed by the 2nd-century Greek astronomer Ptolemy, and it remains one of the 88 modern constellations today. It is easily recognizable due to its distinctive 'M' shape when in upper culmination but in higher northern locations when near lower culminations in spring and summer it has a 'W' shape, formed by five bright stars. It is bordered by Andromeda to the south, Perseus to the southeast, and Cepheus to the north. It is opposite the Big Dipper.In northern locations above 34ºN latitude it is visible year-round and in the (sub)tropics it can be seen at its clearest from September to early November in its characteristic 'M' shape. Even in low southern latitudes below 25ºS is can be seen low in the North.