Stellar temperatures and spectral types
... • Wien’s law works perfectly for objects with Planck spectra. Stars don’t quite have Planck-like spectra. 10,000k `blackbody’ spectrum 10,000k stellar spectrum ...
... • Wien’s law works perfectly for objects with Planck spectra. Stars don’t quite have Planck-like spectra. 10,000k `blackbody’ spectrum 10,000k stellar spectrum ...
PARALLAX EXERCISE1 The goal of this exercise is to introduce the
... experiment above. How does the parallax (the apparent shift of the position of your finger) change as your finger is moved closer to your ...
... experiment above. How does the parallax (the apparent shift of the position of your finger) change as your finger is moved closer to your ...
D2 Stellar characteristics and stellar evolution
... dimming) which is caused by periodic expansion and contraction of outer surface (brighter as it expands). This is to do with the balance between the nuclear and gravitational forces within the star. In most stars these forces are balanced over long periods but in Cepheid variables they seem to take ...
... dimming) which is caused by periodic expansion and contraction of outer surface (brighter as it expands). This is to do with the balance between the nuclear and gravitational forces within the star. In most stars these forces are balanced over long periods but in Cepheid variables they seem to take ...
ppt - Astronomy & Physics
... So net result is conversion of 4 protons into Helium nucleus. The mass of the Helium nucleus is less than the mass of the 4 protons, and this mass is converted into energy, which powers the Sun (and other stars) ...
... So net result is conversion of 4 protons into Helium nucleus. The mass of the Helium nucleus is less than the mass of the 4 protons, and this mass is converted into energy, which powers the Sun (and other stars) ...
7_Big_bang
... use up its hydrogen. Note, Sun has been shinning for 4.6 B. years so it has about 5 B. more years to go before becoming a red giant. More massive stars, last much less then 10 B. years. Less massive stars last longer. ...
... use up its hydrogen. Note, Sun has been shinning for 4.6 B. years so it has about 5 B. more years to go before becoming a red giant. More massive stars, last much less then 10 B. years. Less massive stars last longer. ...
Cassiopeia Kelly Pearce
... p.88). It is located near the edge of the constellation boundary, bordering on Cepheus (Starry Night Enthusiast, 2010). NGC 457 is an open cluster, meaning that the hundreds or even thousands of objects within it formed at the same time, from the same nebulae (Gater & Vamplew, 2010, p.88). There is ...
... p.88). It is located near the edge of the constellation boundary, bordering on Cepheus (Starry Night Enthusiast, 2010). NGC 457 is an open cluster, meaning that the hundreds or even thousands of objects within it formed at the same time, from the same nebulae (Gater & Vamplew, 2010, p.88). There is ...
Introduction to Celestial Spheres (Professor Powerpoint)
... Looking toward the south you’ll see stars rise in the south east, go to the highest point and set in the southwest, a shorter arc across the sky. ...
... Looking toward the south you’ll see stars rise in the south east, go to the highest point and set in the southwest, a shorter arc across the sky. ...
Joining the Party - Lincoln-Sudbury Regional High School
... How to observe star formation? In the Activity Starbirth we saw that star formation involves the collapse of a cool molecular cloud. In the final stages of this collapse, the cloud’s core becomes sufficiently hot and the gas is under enough pressure for fusion reactions to begin: this is a young st ...
... How to observe star formation? In the Activity Starbirth we saw that star formation involves the collapse of a cool molecular cloud. In the final stages of this collapse, the cloud’s core becomes sufficiently hot and the gas is under enough pressure for fusion reactions to begin: this is a young st ...
Stellar Masses
... velocities are lower than the actual velocities. If it is in the plane of observation then twice per orbit the stars will pass in front of each other and the total luminosity will dim.[Eclipsing Binary] Sufficient visual or eclipsing binaries are known to check the mass-luminosity relationship deriv ...
... velocities are lower than the actual velocities. If it is in the plane of observation then twice per orbit the stars will pass in front of each other and the total luminosity will dim.[Eclipsing Binary] Sufficient visual or eclipsing binaries are known to check the mass-luminosity relationship deriv ...
Stars III The Hertzsprung
... • As the cloud continues to contract, it passes a threshold where it keeps collapsing until the densities and temperatures are high enough for nuclear fusion to begin • This computer simulation shows how a cloud fragments into small, dense clumps over time. These clumps fragment into dense cores f ...
... • As the cloud continues to contract, it passes a threshold where it keeps collapsing until the densities and temperatures are high enough for nuclear fusion to begin • This computer simulation shows how a cloud fragments into small, dense clumps over time. These clumps fragment into dense cores f ...
29_worlds_unnumbered..
... are unstable over billions of years. Multiple star systems are probably not good places to look for planets and life. Look near single stars. ...
... are unstable over billions of years. Multiple star systems are probably not good places to look for planets and life. Look near single stars. ...
APOD 2016 Calendar
... The Matter of the Bullet Cluster Composite Credit: X-ray: NASA/CXC/CfA/ M.Markevitch et al.; Lensing Map: NASA/STScI; ESO WFI; Magellan/U.Arizona/ D.Clowe et al. Optical: NASA/STScI; Magellan/U.Arizona/D.Clowe et al. Explanation: The matter in galaxy cluster 1E 0657-56, fondly known as the “bullet ...
... The Matter of the Bullet Cluster Composite Credit: X-ray: NASA/CXC/CfA/ M.Markevitch et al.; Lensing Map: NASA/STScI; ESO WFI; Magellan/U.Arizona/ D.Clowe et al. Optical: NASA/STScI; Magellan/U.Arizona/D.Clowe et al. Explanation: The matter in galaxy cluster 1E 0657-56, fondly known as the “bullet ...
WARM-UP # 32 Which planets are the terrestrial planets and which
... which planets are the gas planets? What are three of their primary differences? The terrestrial planets are made of rock, smaller, closer together, do not have rings, and are closer to the sun. ...
... which planets are the gas planets? What are three of their primary differences? The terrestrial planets are made of rock, smaller, closer together, do not have rings, and are closer to the sun. ...
Shining Light on the Stars: The Hertzsprung-Russell
... Our Sun is located here on the diagram, and as before, the 122 brightest stars visible in the night sky from Earth are located here. But what about all the stars in the nearby solar neighborhood, most of which are too faint to be seen without a telescope? We immediately see that these two groups of ...
... Our Sun is located here on the diagram, and as before, the 122 brightest stars visible in the night sky from Earth are located here. But what about all the stars in the nearby solar neighborhood, most of which are too faint to be seen without a telescope? We immediately see that these two groups of ...
Contents ISP 205 Section 2 Study Guide for Test 3 28 March 2007
... A white dwarf has about the same mass as the sun and the same size as the earth. True or false? A neutron star has about the same mass as the sun and the same size as the earth. True or false? If the temperature of the sun cooled suddenly, would the size change? If the temperature of the white dwarf ...
... A white dwarf has about the same mass as the sun and the same size as the earth. True or false? A neutron star has about the same mass as the sun and the same size as the earth. True or false? If the temperature of the sun cooled suddenly, would the size change? If the temperature of the white dwarf ...
society journal - Auckland Astronomical Society
... few comments on the overall judging: The quality of images entered into this years competition was of a high standard making it challenging to judge. In the Artistic/Misc and Newcomers categories, I was mainly looking for well composed natural looking images that stood out from the rest and unique i ...
... few comments on the overall judging: The quality of images entered into this years competition was of a high standard making it challenging to judge. In the Artistic/Misc and Newcomers categories, I was mainly looking for well composed natural looking images that stood out from the rest and unique i ...
Introduction To Astronomy
... Earth Rotation = Sky Rotation Polaris - The North Star Circumpolar Star - “Around the Pole” star - Does not set below horizon in the sky at a particular latitude Noncircumpolar Star - Rises and sets at some time during the day or night ...
... Earth Rotation = Sky Rotation Polaris - The North Star Circumpolar Star - “Around the Pole” star - Does not set below horizon in the sky at a particular latitude Noncircumpolar Star - Rises and sets at some time during the day or night ...
Stars III - Indiana University Astronomy
... has occurred since the creation of the universe, only 2% of the ordinary matter in the universe is now in the form of heavy elements. Most is still hydrogen and helium ...
... has occurred since the creation of the universe, only 2% of the ordinary matter in the universe is now in the form of heavy elements. Most is still hydrogen and helium ...
Goal: To understand how we know distances to various
... • If you compare the apparent and absolute magnitudes of an object you get its distance. • How to do that? • 1) spectra – tells you what the mass of the star is by its temperature and its spectral type (although does not work so well for giants – works great for main sequences stars, but this separa ...
... • If you compare the apparent and absolute magnitudes of an object you get its distance. • How to do that? • 1) spectra – tells you what the mass of the star is by its temperature and its spectral type (although does not work so well for giants – works great for main sequences stars, but this separa ...
objects in telescope are farther than they appear
... be detected, such sky conditions and the sensitivity of the human eye.10 This detection limit means that the apparent star diameters Galileo sees will be smaller than twice the Airy Disk radius (Figure 2). What's more, dimmer stars will appear to have smaller diameters than brighter stars (Figure 3) ...
... be detected, such sky conditions and the sensitivity of the human eye.10 This detection limit means that the apparent star diameters Galileo sees will be smaller than twice the Airy Disk radius (Figure 2). What's more, dimmer stars will appear to have smaller diameters than brighter stars (Figure 3) ...
Earth Motions and the Heavens
... These galaxies are 200,000 light years away, yet easily visible to the naked eye in dark skies! ...
... These galaxies are 200,000 light years away, yet easily visible to the naked eye in dark skies! ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.