Essay - CLC Charter School
... much energy as the sun will in a life- time, and the explosion is equivalent to the power in a 1028 megaton bomb (i.e., a few octillion nuclear warheads). How Do Supernovae Occur Supernovae occur when the star’s core fusion process runs out of fuel. The outward pressure drops, causing the gravitatio ...
... much energy as the sun will in a life- time, and the explosion is equivalent to the power in a 1028 megaton bomb (i.e., a few octillion nuclear warheads). How Do Supernovae Occur Supernovae occur when the star’s core fusion process runs out of fuel. The outward pressure drops, causing the gravitatio ...
Conceptobasico.pdf
... At this time, the object is at its maximum altitude in the sky. The altazimuth coordinates of an object are local coordinates. Stars very far south near the South Celestial Pole do not rise at all, and they remain unseen for observers in the north. As the Earth orbits the Sun, we see the Sun moving ...
... At this time, the object is at its maximum altitude in the sky. The altazimuth coordinates of an object are local coordinates. Stars very far south near the South Celestial Pole do not rise at all, and they remain unseen for observers in the north. As the Earth orbits the Sun, we see the Sun moving ...
JSchreiberTalk3 - FSU High Energy Physics
... More dwarf galaxies should be observed These may exist as difficult-to-detect “dark galaxies” ...
... More dwarf galaxies should be observed These may exist as difficult-to-detect “dark galaxies” ...
chapter 26 instructor notes
... the observed very small proportion of low-metallicity G dwarfs in the Galactic disk and model predictions for a sizable fraction (~½), given that the original population of low-metallicity stars from the Galaxy’s formation has not had time to evolve away from the main sequence. Perhaps the amount of ...
... the observed very small proportion of low-metallicity G dwarfs in the Galactic disk and model predictions for a sizable fraction (~½), given that the original population of low-metallicity stars from the Galaxy’s formation has not had time to evolve away from the main sequence. Perhaps the amount of ...
MT 2 Answers Version A
... 28. The star named Capella has an apparent magnitude of 0 while the star named Polaris has an apparent magnitude of 2, which means that Capella appears ...
... 28. The star named Capella has an apparent magnitude of 0 while the star named Polaris has an apparent magnitude of 2, which means that Capella appears ...
Time From the Perspective of a Particle Physicist
... • If we use well-understood close stars to determine the overall brightness scale of a specific class of star, then measuring the spectrum can be used to give the distance for stars > 500 LY away 1. Determine Surface Temperature + spectral class of star 2. Determine where on HR diagram should go 3. ...
... • If we use well-understood close stars to determine the overall brightness scale of a specific class of star, then measuring the spectrum can be used to give the distance for stars > 500 LY away 1. Determine Surface Temperature + spectral class of star 2. Determine where on HR diagram should go 3. ...
MT 2 Answers Version C
... Choose the answer that best completes the question. Read each problem carefully and read through all the answers. Take your time. If a question is unclear, ask for clarification during the exam. Mark your answers on the scantron sheet and on your copy of the exam. Keep your copy of the exam and chec ...
... Choose the answer that best completes the question. Read each problem carefully and read through all the answers. Take your time. If a question is unclear, ask for clarification during the exam. Mark your answers on the scantron sheet and on your copy of the exam. Keep your copy of the exam and chec ...
MT 2 Answers Version D
... Luminosity is how bright the star appears to us; intrinsic brightness is how much light it emits. ...
... Luminosity is how bright the star appears to us; intrinsic brightness is how much light it emits. ...
Midterm Study Game
... a. The time it takes light to travel in 1 year. b. The time it takes to travel 1 astronomical unit. c. The distance light travels in 1 year. d. The distance of 1 AU. Light Years are used to measure distance between galaxies. AUs are better used for distances between planets in a solar (planetary sys ...
... a. The time it takes light to travel in 1 year. b. The time it takes to travel 1 astronomical unit. c. The distance light travels in 1 year. d. The distance of 1 AU. Light Years are used to measure distance between galaxies. AUs are better used for distances between planets in a solar (planetary sys ...
Galaxies
... about 25 percent of all galaxies. The luminous young stars of spirals make it much easier to notice them than other galaxy ...
... about 25 percent of all galaxies. The luminous young stars of spirals make it much easier to notice them than other galaxy ...
Slide 1
... • In addition to “normal” stars, there are also red giants, red supergiants, blue giants, blue supergiants, red dwarfs, and white dwarfs • Luminosity class can distinguish giant star from main-sequence one in the same spectral class • If spectrum is measured, can find luminosity; combining this with ...
... • In addition to “normal” stars, there are also red giants, red supergiants, blue giants, blue supergiants, red dwarfs, and white dwarfs • Luminosity class can distinguish giant star from main-sequence one in the same spectral class • If spectrum is measured, can find luminosity; combining this with ...
17_LectureOutline
... • In addition to “normal” stars, there are also red giants, red supergiants, blue giants, blue supergiants, red dwarfs, and white dwarfs • Luminosity class can distinguish giant star from main-sequence one in the same spectral class • If spectrum is measured, can find luminosity; combining this with ...
... • In addition to “normal” stars, there are also red giants, red supergiants, blue giants, blue supergiants, red dwarfs, and white dwarfs • Luminosity class can distinguish giant star from main-sequence one in the same spectral class • If spectrum is measured, can find luminosity; combining this with ...
The Magnitude Scale
... The apparent and absolute magnitudes covered so far are bolometric magnitudes (bolometric comes from the word bolometer which is an instrument that measures the increase in temperature in the flux it receives at all wavelengths). In practice, detectors measure an object’s flux within a certain wav ...
... The apparent and absolute magnitudes covered so far are bolometric magnitudes (bolometric comes from the word bolometer which is an instrument that measures the increase in temperature in the flux it receives at all wavelengths). In practice, detectors measure an object’s flux within a certain wav ...
The Galaxy Luminosity Function
... In a cluster, Vs is the same for all L, so ns & φs have the same shape. However, if the sample is apparent magnitude limited, then Vs ↓ as L ↓. (Schechter 1976) ...
... In a cluster, Vs is the same for all L, so ns & φs have the same shape. However, if the sample is apparent magnitude limited, then Vs ↓ as L ↓. (Schechter 1976) ...
September Globular Clusters - Salisbury Plain Observing Group
... good “non comet”. It is fairly easy to find, lying south west of an open chevron shaped asterism. It is around 55 light years across and is 27,000 light years away. Moderate powers used with a 6” start to resolve the cluster into its individual stars. Leaving Lyra, Delphinus is the next destination, ...
... good “non comet”. It is fairly easy to find, lying south west of an open chevron shaped asterism. It is around 55 light years across and is 27,000 light years away. Moderate powers used with a 6” start to resolve the cluster into its individual stars. Leaving Lyra, Delphinus is the next destination, ...
A glance at the beginning of the Universe
... •To determine the Hubble constant •To find the age of the Universe ...
... •To determine the Hubble constant •To find the age of the Universe ...
Clusters of galaxies
... Spectroscopy is FORS2 (R ~ 1200) Science goals are build up of stellar populations with redshift (plus weak lensing). ...
... Spectroscopy is FORS2 (R ~ 1200) Science goals are build up of stellar populations with redshift (plus weak lensing). ...
Chapter 18 - Stars - University of New Mexico
... • Both found MW is a flattened structure. But both put the Sun near the center. Studies limited by small telescopes, lack of understanding of extinction by dust, and (in Herschels’ case) no stellar distances had been determined. Kapteyn inferred MW only 17 kpc across. • This was before spiral struct ...
... • Both found MW is a flattened structure. But both put the Sun near the center. Studies limited by small telescopes, lack of understanding of extinction by dust, and (in Herschels’ case) no stellar distances had been determined. Kapteyn inferred MW only 17 kpc across. • This was before spiral struct ...
Stefan-Boltzmann`s law Wien`s law
... main sequence stars: fusing hydrogen into helium, the difference between them is in mass: left upper corner more massive than right lower corner. white dwarf compared to a main sequence star: • has smaller radius • more dense • higher surface temperature • energy not produced by nuclear fusion ...
... main sequence stars: fusing hydrogen into helium, the difference between them is in mass: left upper corner more massive than right lower corner. white dwarf compared to a main sequence star: • has smaller radius • more dense • higher surface temperature • energy not produced by nuclear fusion ...
ISM&Galaxy
... If one looks only at the cloud, the background (empty space) is even colder, so you always get an emission line spectrum. If you look at a cloud through a hotter cloud of gas, you will get an emission line spectrum which includes a continuum. ...
... If one looks only at the cloud, the background (empty space) is even colder, so you always get an emission line spectrum. If you look at a cloud through a hotter cloud of gas, you will get an emission line spectrum which includes a continuum. ...
Lecture 24, PPT version
... • High mass stars end their lives as either neutron stars or black holes after undergoing a supernova • Supernova of high mass star triggered by build up of iron in the ...
... • High mass stars end their lives as either neutron stars or black holes after undergoing a supernova • Supernova of high mass star triggered by build up of iron in the ...
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.