Exercise 11
... another automobile) is approximately twice as far away because automobiles are roughly the same size. We use the fact that we know the approximate linear sizes of common objects such as cars, build ings, and bicycles to estimate their distances from their apparent angular sizes. The mental conversi ...
... another automobile) is approximately twice as far away because automobiles are roughly the same size. We use the fact that we know the approximate linear sizes of common objects such as cars, build ings, and bicycles to estimate their distances from their apparent angular sizes. The mental conversi ...
Quiz #4 – The Electromagnetic Spectrum and Stars
... Two stars that are in close orbit around each other are called ___________ binary stars. ...
... Two stars that are in close orbit around each other are called ___________ binary stars. ...
E1 Introduction to the Universe NEW
... Know the names of the planets! They orbit in ellipses with the sun at one foci Inner planets small and rocky Outer planets large and mainly gas Outer planets are much further from the sun Asteroid belt between Mars and Jupiter ...
... Know the names of the planets! They orbit in ellipses with the sun at one foci Inner planets small and rocky Outer planets large and mainly gas Outer planets are much further from the sun Asteroid belt between Mars and Jupiter ...
Mark scheme for Support Worksheet – Topic E, Worksheet 1
... A and B have the same luminosity and A has a higher temperature; from L AT 4 B must then have the larger surface area and hence larger radius. ...
... A and B have the same luminosity and A has a higher temperature; from L AT 4 B must then have the larger surface area and hence larger radius. ...
Classifying Stars (pages 753–754) Key Concept: Characteristics
... from Earth does not look very bright. But the sun looks very bright because it is so close to Earth. ...
... from Earth does not look very bright. But the sun looks very bright because it is so close to Earth. ...
Notes - CH 12
... contract until it is about the size of Earth Some become so hot they emit a blue light The Sun will become a dwarf star in billions of years Supernova: the explosion of a supergiant star A supergiant star can explode before it dies The debris is still visible as an interstellar cloud ...
... contract until it is about the size of Earth Some become so hot they emit a blue light The Sun will become a dwarf star in billions of years Supernova: the explosion of a supergiant star A supergiant star can explode before it dies The debris is still visible as an interstellar cloud ...
The Stars
... The Stars Stars vary greatly in size, brightness, temperature, and colour. Here are some of the things we have learned about the properties of stars. Measuring distance Just as with the kilometre, the AU is not very useful when we start to study stuff outside of our Solar System. A much larger unit ...
... The Stars Stars vary greatly in size, brightness, temperature, and colour. Here are some of the things we have learned about the properties of stars. Measuring distance Just as with the kilometre, the AU is not very useful when we start to study stuff outside of our Solar System. A much larger unit ...
Star Planet - Stony Brook Astronomy
... A moderately large object that orbits a star. Planets may be rocky, icy, or gaseous in ...
... A moderately large object that orbits a star. Planets may be rocky, icy, or gaseous in ...
ASTR 105 Intro Astronomy: The Solar System
... Sample Clicker Question Astronomers see a bright supernova explode in the Andromeda galaxy (the nearest big galaxy in the local group; located 2.6 million ly away). The remnants from such explosions disperse in about 10,000 years. A. The supernova remnant still exists now, and we will watch it dis ...
... Sample Clicker Question Astronomers see a bright supernova explode in the Andromeda galaxy (the nearest big galaxy in the local group; located 2.6 million ly away). The remnants from such explosions disperse in about 10,000 years. A. The supernova remnant still exists now, and we will watch it dis ...
Astronomy 5682 Problem Set 6: Supernova Cosmology Due
... nearby galaxy, we can assume that the supernovae in our diagram have the same Mmax . In this Problem, we will use Cepheid variables to determine the distance to a galaxy where a well observed supernova exploded in 1990. (Actually, it exploded millions of years before, but the light reached us in 199 ...
... nearby galaxy, we can assume that the supernovae in our diagram have the same Mmax . In this Problem, we will use Cepheid variables to determine the distance to a galaxy where a well observed supernova exploded in 1990. (Actually, it exploded millions of years before, but the light reached us in 199 ...
Distances in Cosmology One of the most basic measurements that
... direction appears to change, by an amount that is inversely proportional to its distance from the viewing points. This is one of the ways we obtain depth perception; looking out with first one eye, then the other, shows that close things appear to move more than distant things. If you know the dista ...
... direction appears to change, by an amount that is inversely proportional to its distance from the viewing points. This is one of the ways we obtain depth perception; looking out with first one eye, then the other, shows that close things appear to move more than distant things. If you know the dista ...
The Milky Way Galaxy
... In the early part of the 20th century J. C. Kapteyn (1851-1922) produced a very similar model of the Galaxy to that of Herschel. He too did not take into account the effect of interstellar dust. ...
... In the early part of the 20th century J. C. Kapteyn (1851-1922) produced a very similar model of the Galaxy to that of Herschel. He too did not take into account the effect of interstellar dust. ...
Define density as the mass of an object divided by its volume
... 3. Why do scientists prefer the metric system of measurement? 4. What is the rule for taking measurements with the appropriate number of significant figures? Unit 2: Cosmic Evolution 5. Atomic mass units (AMUs) are used to measure what types of particles? 6. How many neutrons are in sodium-24? 7. Wh ...
... 3. Why do scientists prefer the metric system of measurement? 4. What is the rule for taking measurements with the appropriate number of significant figures? Unit 2: Cosmic Evolution 5. Atomic mass units (AMUs) are used to measure what types of particles? 6. How many neutrons are in sodium-24? 7. Wh ...
The “Tuning Fork” Diagram Galaxy Properties 1 “Early”
... Ratio Gaussian fit: • Convolution turns into multiplication in F.T. space. • F.T. of a Gaussian is a Gaussian. ...
... Ratio Gaussian fit: • Convolution turns into multiplication in F.T. space. • F.T. of a Gaussian is a Gaussian. ...
Sample Midterm - IUPUI Physics
... • B) The period of variability allows you to determine its absolute brightness • C) The time it takes to vary its brightness is determined by how long the light took to get to us • D) all of the above 8) If attempting to determine the distance to a nearby galaxy which is the better type of variable ...
... • B) The period of variability allows you to determine its absolute brightness • C) The time it takes to vary its brightness is determined by how long the light took to get to us • D) all of the above 8) If attempting to determine the distance to a nearby galaxy which is the better type of variable ...
Triangulation
... Suppose that baseline AB is 450 meters the angle between the baseline and the line from B to the tree is 52°. We can transfer the problem to paper by letting one box on our graph represent 25 meters on the ground. ...
... Suppose that baseline AB is 450 meters the angle between the baseline and the line from B to the tree is 52°. We can transfer the problem to paper by letting one box on our graph represent 25 meters on the ground. ...
Part II, page 129 (instructions on page 127)
... • Combining distance measurements with velocity measurements tells us Hubble’s constant, and the inverse of Hubble’s constant tells us how long it would have taken the universe to reach its present size if the expansion rate had never changed. Based on Hubble’s constant and estimates of how it ...
... • Combining distance measurements with velocity measurements tells us Hubble’s constant, and the inverse of Hubble’s constant tells us how long it would have taken the universe to reach its present size if the expansion rate had never changed. Based on Hubble’s constant and estimates of how it ...
Chapter 19. Mapping the Universe from Herschel to Sloan
... While Cepheids are useful for getting distances to nearby galaxies it is also a painfully slow process because you need to get many images of a galaxy spread out over more than a year and discover all the Cepheids, measure their brightnesses as a function of time, etc. Fortunately, a second discover ...
... While Cepheids are useful for getting distances to nearby galaxies it is also a painfully slow process because you need to get many images of a galaxy spread out over more than a year and discover all the Cepheids, measure their brightnesses as a function of time, etc. Fortunately, a second discover ...
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.