Life Stages of High
... • After core helium fusion stops, He fuses into carbon in a shell around the carbon core, and H fuses to He in a shell around the helium layer. • This double-shell-burning stage never reaches equilibrium—the fusion rate periodically spikes upward in a series of thermal pulses. • With each spike, con ...
... • After core helium fusion stops, He fuses into carbon in a shell around the carbon core, and H fuses to He in a shell around the helium layer. • This double-shell-burning stage never reaches equilibrium—the fusion rate periodically spikes upward in a series of thermal pulses. • With each spike, con ...
The Earth, the Sun, and the Constellations of the Zodiac
... constellations is known as the ecliptic, which is the plane defined by Earth’s orbit. The constellations that the ecliptic passes through are the constellations of the zodiac, or simply, “the zodiac.” For thousands of years, people all over the world have paid attention to the Sun’s path through th ...
... constellations is known as the ecliptic, which is the plane defined by Earth’s orbit. The constellations that the ecliptic passes through are the constellations of the zodiac, or simply, “the zodiac.” For thousands of years, people all over the world have paid attention to the Sun’s path through th ...
Journey through the cosmos
... the brilliant hearts of very young, active galaxies. They may be small and compact and are sometimes no bigger than our Solar System. But they give out as much energy as a hundred or even a thousand normal galaxies. These objects are called quasars. The source of energy for a quasar is a mystery to ...
... the brilliant hearts of very young, active galaxies. They may be small and compact and are sometimes no bigger than our Solar System. But they give out as much energy as a hundred or even a thousand normal galaxies. These objects are called quasars. The source of energy for a quasar is a mystery to ...
A-level Physics A Question paper Unit 5/W - Astrophysics
... (3) star Y, which is the same size as the Sun, but significantly cooler, (4) star Z, which is much smaller than the Sun, and has molecular bands as an important feature in its spectrum. (7 marks) ____ ...
... (3) star Y, which is the same size as the Sun, but significantly cooler, (4) star Z, which is much smaller than the Sun, and has molecular bands as an important feature in its spectrum. (7 marks) ____ ...
RASC Bulletin June 1996 - Royal Astronomical Society of Canada
... etry on my own but it was a lot of fun and I learned to handle Christoffel symbols and the curvature tensor. I was now ready to tackle Einstein’s general theory of relativity, physical cosmology and the theory of gravity. The deflection of light by the Sun, the perihe lion advance and the gravitati ...
... etry on my own but it was a lot of fun and I learned to handle Christoffel symbols and the curvature tensor. I was now ready to tackle Einstein’s general theory of relativity, physical cosmology and the theory of gravity. The deflection of light by the Sun, the perihe lion advance and the gravitati ...
AST1100 Lecture Notes
... remains. This star which now consist only of the remaining degenerate core is called a white dwarf. The surrounding cloud of gas which has been blown off is called a planetary nebula (these have nothing to do with planets) As the star was blowing away the outer layers, the hotter inner parts of the ...
... remains. This star which now consist only of the remaining degenerate core is called a white dwarf. The surrounding cloud of gas which has been blown off is called a planetary nebula (these have nothing to do with planets) As the star was blowing away the outer layers, the hotter inner parts of the ...
PSC100 Summary Chapters 10 to Chapter 20
... the stars appear to be quite alike. There are, of course, different patterns to be seen in various areas of the sky, but aside from our Sun and the planet of our solar system, all of the other points of light seem much the same. We have already learned in lesson 3 that the light from these distant p ...
... the stars appear to be quite alike. There are, of course, different patterns to be seen in various areas of the sky, but aside from our Sun and the planet of our solar system, all of the other points of light seem much the same. We have already learned in lesson 3 that the light from these distant p ...
Problem set 1 solution
... Now we dive into the complications caused by the timezones. For a map of timezones see http://aa.usno.navy.mil/graphics/TimeZoneMap2007.pdf The longitude of Palomar is 116◦ 520 west. Time zones are centered on longitudes that are a multiple of 15◦ , so the relevant timezone (in this case PST) is cen ...
... Now we dive into the complications caused by the timezones. For a map of timezones see http://aa.usno.navy.mil/graphics/TimeZoneMap2007.pdf The longitude of Palomar is 116◦ 520 west. Time zones are centered on longitudes that are a multiple of 15◦ , so the relevant timezone (in this case PST) is cen ...
Practice test - astronomy
... amount of light and dark hours A. January B. June C. September D. December ...
... amount of light and dark hours A. January B. June C. September D. December ...
AST1100 Lecture Notes
... filaments, embedded along the inner rim of the nebula, points back toward the central star, which is a small, super-hot white dwarf. In general, a planetary nebula is an emission nebula consisting of an expanding glowing shell of ionized gas ejected during the asymptotic giant branch phase of certai ...
... filaments, embedded along the inner rim of the nebula, points back toward the central star, which is a small, super-hot white dwarf. In general, a planetary nebula is an emission nebula consisting of an expanding glowing shell of ionized gas ejected during the asymptotic giant branch phase of certai ...
Adrian Zielonka`s Space and Astro notes for May `17
... As the sun sets at 9:08pm on the 26th a very thin crescent Moon will be 14 degrees to the upper left of where the Sun sets and just 4½ degrees above the horizon. On the 27th at 10:00pm, Mars will be 12 degrees to the right and slightly lower than the height of the Moon. The Moon being just 6 degr ...
... As the sun sets at 9:08pm on the 26th a very thin crescent Moon will be 14 degrees to the upper left of where the Sun sets and just 4½ degrees above the horizon. On the 27th at 10:00pm, Mars will be 12 degrees to the right and slightly lower than the height of the Moon. The Moon being just 6 degr ...
A Collection of Curricula for the STARLAB Polynesian Voyaging
... was called a kilo (seer, prophet, or judge; one who "looks earnestly"). Basically all this went back to a knowledge of the heavenly bodies and their apparent motions, upon which the Hawaiian calendar was based. The apparent movement of the stars across the sky, from east to west, both nightly and th ...
... was called a kilo (seer, prophet, or judge; one who "looks earnestly"). Basically all this went back to a knowledge of the heavenly bodies and their apparent motions, upon which the Hawaiian calendar was based. The apparent movement of the stars across the sky, from east to west, both nightly and th ...
L87 THE b PICTORIS MOVING GROUP B. ZUCkERMAN AND
... A caveat is that such detections must be of thermal emission from young, warm planets rather than of reflected starlight from old, cold planets, such as Jupiter. At wavelengths near a few microns, thermal emission from a giant planet that is not older than a few tens of millions of years can be hund ...
... A caveat is that such detections must be of thermal emission from young, warm planets rather than of reflected starlight from old, cold planets, such as Jupiter. At wavelengths near a few microns, thermal emission from a giant planet that is not older than a few tens of millions of years can be hund ...
Astronomical units
... The color of a star or other object is defined as the difference in the magnitude in each of two bandpasses: e.g. the (B-V) color is: B-V = mB-mV Stars radiate roughly as blackbodies, so the color reflects surface temperature. Vega has T = 9500 K, by definition color is zero. Which sense for hotter ...
... The color of a star or other object is defined as the difference in the magnitude in each of two bandpasses: e.g. the (B-V) color is: B-V = mB-mV Stars radiate roughly as blackbodies, so the color reflects surface temperature. Vega has T = 9500 K, by definition color is zero. Which sense for hotter ...
chapter 24 instructor notes
... for the solar motion from studying stellar proper motions. His result is very similar to that recognized today. Also in 1837, Frederick Struve found evidence for interstellar extinction in star count data, which was considered necessary at that time to resolve Herschel’s “infinite universe” with Olb ...
... for the solar motion from studying stellar proper motions. His result is very similar to that recognized today. Also in 1837, Frederick Struve found evidence for interstellar extinction in star count data, which was considered necessary at that time to resolve Herschel’s “infinite universe” with Olb ...
B2 Star Formation and Nuclear Fusion
... Transition to being optically-thick At increasing density, collapsing protostellar gas becomes optically thick and radiation is no longer able to escape. • During collapse, gravitational potential energy is liberated and radiated away. • Transition to being optically thick prevents further cooling a ...
... Transition to being optically-thick At increasing density, collapsing protostellar gas becomes optically thick and radiation is no longer able to escape. • During collapse, gravitational potential energy is liberated and radiated away. • Transition to being optically thick prevents further cooling a ...
Sternentstehung - Star Formation
... - They form exclusively in a clustered mode. - They have very short Kelvin-Helmholtz contraction times and hence no optically observable pre-main sequence evolution. - Large radiation pressure has to be overcome. - Two main proposals: (1) scale up low-mass star formation scenario (turbulent core mod ...
... - They form exclusively in a clustered mode. - They have very short Kelvin-Helmholtz contraction times and hence no optically observable pre-main sequence evolution. - Large radiation pressure has to be overcome. - Two main proposals: (1) scale up low-mass star formation scenario (turbulent core mod ...
Galaxy Formation and Evolution Open Problems
... Dark Halo: Rotation curves of galactic disks Stars and gas in the galactic disks follow circular orbits whose velocity depends on the inner mass only: v2(r) = G M(
... Dark Halo: Rotation curves of galactic disks Stars and gas in the galactic disks follow circular orbits whose velocity depends on the inner mass only: v2(r) = G M(
The Celestial Sphere
... Repeat steps 2 and 3 with the northern star chart and the other, unmarked hemisphere (the “outer" hemisphere in Figure 1). Confirm that the ecliptic lines touch the base at opposite ridges. (Use the hemisphere you have already marked to secure the chart in place.) 5. Look into the northern hemispher ...
... Repeat steps 2 and 3 with the northern star chart and the other, unmarked hemisphere (the “outer" hemisphere in Figure 1). Confirm that the ecliptic lines touch the base at opposite ridges. (Use the hemisphere you have already marked to secure the chart in place.) 5. Look into the northern hemispher ...
Lesson 2_Going Solar - UCAR Center for Science Education
... Planning for individual differences (mediated scaffolding): What are the accommodations/modifications you need to prepare? Students background knowledge will vary greatly. For group activities, levels will be mixed ability. Students will receive academic and behavioral support from para-educators. W ...
... Planning for individual differences (mediated scaffolding): What are the accommodations/modifications you need to prepare? Students background knowledge will vary greatly. For group activities, levels will be mixed ability. Students will receive academic and behavioral support from para-educators. W ...
AY5 Announcements
... (1) More massive stars require higher central temperatures (hydrostatic eqm.) (2) The P-P fusion rate and luminosity is proportional to T4 Therefore, more massive stars will have higher central temperature and higher Luminosity. This is what is seen along the H-R Diagram main sequence. ...
... (1) More massive stars require higher central temperatures (hydrostatic eqm.) (2) The P-P fusion rate and luminosity is proportional to T4 Therefore, more massive stars will have higher central temperature and higher Luminosity. This is what is seen along the H-R Diagram main sequence. ...
shirley - Yancy L. Shirley`s Webpage
... What is the relative importance of spontaneous and stimulated processes in the formation of stars of various mass? What governs the SFR in a molecular cloud? What determined the IMF evolution from molecular cloud clumps to stars? Do stars form in a process of fragmentation of an overall ...
... What is the relative importance of spontaneous and stimulated processes in the formation of stars of various mass? What governs the SFR in a molecular cloud? What determined the IMF evolution from molecular cloud clumps to stars? Do stars form in a process of fragmentation of an overall ...
The Color of Plants on Other Worlds
... Aside from colors reflected by plants, these other features could be signs of life: Oxygen (O2 ) plus water (H2O). Even on a lifeless world, light from the parent star naturally produces a small amount of oxygen in a planet’s atmosphere by splitting water vapor. But the gas is quickly rained out, as ...
... Aside from colors reflected by plants, these other features could be signs of life: Oxygen (O2 ) plus water (H2O). Even on a lifeless world, light from the parent star naturally produces a small amount of oxygen in a planet’s atmosphere by splitting water vapor. But the gas is quickly rained out, as ...
The Milky Way Galaxy
... more erratic velocities than we expect from the amount of matter we can “see” in the cluster ...
... more erratic velocities than we expect from the amount of matter we can “see” in the cluster ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.