Ch. 2
... • But very difficult to explain if you think that Earth is the center of the universe! • In fact, ancients considered but rejected the ...
... • But very difficult to explain if you think that Earth is the center of the universe! • In fact, ancients considered but rejected the ...
Lecture 8a Star Formation 10/15/2014
... where a = 3.5 for main sequence stars (don’t have to memorize) – Ratio of Mass and Radius is almost linear (only changes factor of 3 within 2.5 orders of magnitude of M. PHYS 162 Lecture 8a ...
... where a = 3.5 for main sequence stars (don’t have to memorize) – Ratio of Mass and Radius is almost linear (only changes factor of 3 within 2.5 orders of magnitude of M. PHYS 162 Lecture 8a ...
Star Formation
... if it were not able to radiate away its thermal energy? A. It would continue contracting, but its temperature would not change B. Its mass would increase C. Its internal pressure would increase ...
... if it were not able to radiate away its thermal energy? A. It would continue contracting, but its temperature would not change B. Its mass would increase C. Its internal pressure would increase ...
Elements from Stardust
... • The remaining trace elements such as oxygen, neon, carbon and iron etc. ...
... • The remaining trace elements such as oxygen, neon, carbon and iron etc. ...
Document
... Can you read a street sign a block away? Can you see the binary star in the Big Dipper with your naked eye? ...
... Can you read a street sign a block away? Can you see the binary star in the Big Dipper with your naked eye? ...
Lecture 13, PPT version
... Galaxy). All of the stars formed at roughly the same time. Globular clusters have lots of RED stars, but no BLUE stars (because they died long ago and were not “replenished”). ...
... Galaxy). All of the stars formed at roughly the same time. Globular clusters have lots of RED stars, but no BLUE stars (because they died long ago and were not “replenished”). ...
My power point presentation on spectroscopy of stars (ppt file)
... about temperature, pressure, chemical composition, rotation velocity, magnetic fields, binary companions ...
... about temperature, pressure, chemical composition, rotation velocity, magnetic fields, binary companions ...
Time From the Perspective of a Particle Physicist
... Radius • Find that some are related Large Mass Large Brightness • Determine model of stellar formation and life cycle ...
... Radius • Find that some are related Large Mass Large Brightness • Determine model of stellar formation and life cycle ...
Sakurai`s Object - Department of Physics, HKU
... others pointed out that the slow brightness evolution and the C-rich and H-poor spectrum suggest that this object may be undergoing its final helium flash stage. ...
... others pointed out that the slow brightness evolution and the C-rich and H-poor spectrum suggest that this object may be undergoing its final helium flash stage. ...
doc - Pocket Stars
... Orbital paths of inner planets and sun. Time Animation. Black, white, and red star chart colors for normal, bright, and night viewing conditions, respectively. Chart can be rotated to any of the 16 compass points and also flipped along the North - South axis. Chart can be "live, realtime", or static ...
... Orbital paths of inner planets and sun. Time Animation. Black, white, and red star chart colors for normal, bright, and night viewing conditions, respectively. Chart can be rotated to any of the 16 compass points and also flipped along the North - South axis. Chart can be "live, realtime", or static ...
The Hexalpha or Six-Pointed Star - Cumbria Freemasons | Royal Arch
... Solomon is supposed to have found the hexalpha a most potent talisman. There is a story that he confined a genie in a bottle by sealing it with the hexalpha, which is the reason for the device being known as the Seal of Solomon. It is not known why the Royal Arch adopted the interlaced triangles as ...
... Solomon is supposed to have found the hexalpha a most potent talisman. There is a story that he confined a genie in a bottle by sealing it with the hexalpha, which is the reason for the device being known as the Seal of Solomon. It is not known why the Royal Arch adopted the interlaced triangles as ...
Earth and Space Test
... more space. So, when a star is very far away, only a tiny amount of its light reaches Earth. The sun looks bigger and brighter than other stars because it is closer to Earth. In class, we used flashlights in various ways to observe that distance causes light to dim. The photons spread out more and m ...
... more space. So, when a star is very far away, only a tiny amount of its light reaches Earth. The sun looks bigger and brighter than other stars because it is closer to Earth. In class, we used flashlights in various ways to observe that distance causes light to dim. The photons spread out more and m ...
About SDSS - Astro Projects
... telescopes, and the longer the exposure times needed to see them. Fortunately, modern telescopes no longer need to rely on the human eye looking through an eyepiece. Instead they use electronic detectors ('CCDs') which are very similar to the chips found in ordinary digital cameras (except that inst ...
... telescopes, and the longer the exposure times needed to see them. Fortunately, modern telescopes no longer need to rely on the human eye looking through an eyepiece. Instead they use electronic detectors ('CCDs') which are very similar to the chips found in ordinary digital cameras (except that inst ...
Chapter 7
... As a result, the theories we developed to explain the formation of a solar system fit our system. Since the 1990’s we have discovered hundreds of extrasolar planets. How does our theory match these newly discovered worlds? ...
... As a result, the theories we developed to explain the formation of a solar system fit our system. Since the 1990’s we have discovered hundreds of extrasolar planets. How does our theory match these newly discovered worlds? ...
Answer ALL questions from SECTION A and TWO questions from
... 10. Write an account of the pre-main sequence phase of stellar evolution from the point when hydrostatic equilibrium is established to arrival on the main sequence. Your account should describe the structure and the resulting evolutionary tracks of protostars during contraction to the main sequence. ...
... 10. Write an account of the pre-main sequence phase of stellar evolution from the point when hydrostatic equilibrium is established to arrival on the main sequence. Your account should describe the structure and the resulting evolutionary tracks of protostars during contraction to the main sequence. ...
solutions
... D. Consider a transit survey which looks at a fixed 10 square degrees of the sky, with a sensitivity of 1ppm for stars of apparent magnitude 12 and brighter. How many planets could such a survey detect? The first step is determining how many mag 12 and brighter stars can be seen in 10 square degrees ...
... D. Consider a transit survey which looks at a fixed 10 square degrees of the sky, with a sensitivity of 1ppm for stars of apparent magnitude 12 and brighter. How many planets could such a survey detect? The first step is determining how many mag 12 and brighter stars can be seen in 10 square degrees ...
HABITABLE PLANETS For every star with planets, how many of
... planetesimals in simulations. In 1993, George Wetherill claimed that giant planets should be rare because of observations of disk dispersal time compared to [theoretical] giant planet accretion times (but remember, they could form more quickly by gravitational instability). No matter how they form, ...
... planetesimals in simulations. In 1993, George Wetherill claimed that giant planets should be rare because of observations of disk dispersal time compared to [theoretical] giant planet accretion times (but remember, they could form more quickly by gravitational instability). No matter how they form, ...
Stars and Galaxies - La Salle Elementary Public Schools No 122
... • When a star’s hydrogen supply is nearly gone, the star leaves the main sequence and begins the next stage of its life cycle. • All stars form in the same way, but stars die in different ways, depending on their masses. ...
... • When a star’s hydrogen supply is nearly gone, the star leaves the main sequence and begins the next stage of its life cycle. • All stars form in the same way, but stars die in different ways, depending on their masses. ...
Exam 3 Study Guide
... The Milky Way is a _________ type galaxy. The Solar System is located in the ___________ spur. The Sun is located ________ away from the center of the Milky Way. The mass of the Milky Way is ________________ solar masses. The closest galaxy to the Milky Way is the ________________. Leavitt’s Law rel ...
... The Milky Way is a _________ type galaxy. The Solar System is located in the ___________ spur. The Sun is located ________ away from the center of the Milky Way. The mass of the Milky Way is ________________ solar masses. The closest galaxy to the Milky Way is the ________________. Leavitt’s Law rel ...
The Abundances of the Fe Group Elements in Three Early B Stars in
... relative to H by -0.70 dex and N by ∼ -0.90 dex. The C/N ratio in the sun is 0.61 dex (Asplund et al. 2005) but in NGC 8181-D1 we find C/N∼0.20 dex. The elevated abundance of nitrogen relative to carbon suggests that CNO-processed material from the star’s core (first dredge-up) may have mixed with t ...
... relative to H by -0.70 dex and N by ∼ -0.90 dex. The C/N ratio in the sun is 0.61 dex (Asplund et al. 2005) but in NGC 8181-D1 we find C/N∼0.20 dex. The elevated abundance of nitrogen relative to carbon suggests that CNO-processed material from the star’s core (first dredge-up) may have mixed with t ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.