Stellar Evolution
... 7. What is the difference in time that it takes for a protostar to become a main sequence star ...
... 7. What is the difference in time that it takes for a protostar to become a main sequence star ...
Ch 28 Class Notes
... 2. An important class of pulsating stars are called _____________________________. These are yellow supergiants whose cycles of brightness range from about 1 day to 50 days (5 is average). The absolute magnitude of a Cepheid is related to the length of time between its periods of maximum brightness ...
... 2. An important class of pulsating stars are called _____________________________. These are yellow supergiants whose cycles of brightness range from about 1 day to 50 days (5 is average). The absolute magnitude of a Cepheid is related to the length of time between its periods of maximum brightness ...
Question Paper - SAVE MY EXAMS!
... 14 Current theories give a number of alternatives for the future evolution of our universe. According to current theory, an open universe A eventually reaches a maximum size. B expands forever. C has an unpredictable future. D is a steady state universe. (Total for Question 10 = 1 mark) 15 On a Hert ...
... 14 Current theories give a number of alternatives for the future evolution of our universe. According to current theory, an open universe A eventually reaches a maximum size. B expands forever. C has an unpredictable future. D is a steady state universe. (Total for Question 10 = 1 mark) 15 On a Hert ...
Astronomy 12 - hrsbstaff.ednet.ns.ca
... (d) Describe the following types of black holes: stellar-mass, supermassive and primordial. (d) How are stellar-mass black holes detected and their masses inferred? G. Mass-Luminosity Relation. A nearby star happens to be twice as massive as the Sun, and also twice as large. (a) What is its main seq ...
... (d) Describe the following types of black holes: stellar-mass, supermassive and primordial. (d) How are stellar-mass black holes detected and their masses inferred? G. Mass-Luminosity Relation. A nearby star happens to be twice as massive as the Sun, and also twice as large. (a) What is its main seq ...
12/08/14-- Student ID ______ TA Name
... Use Fig. 4 to answer the next 5 questions. 9. (1 pt) Contains the coolest region where absorption lines form. B 10. (1 pt) Energy gets through this region via the “random walk.” D 11. (1 pt) Magnetic fields from Sun’s interior poke out in these photospheric dark regions. A 12. (1 pt) The “boiling” m ...
... Use Fig. 4 to answer the next 5 questions. 9. (1 pt) Contains the coolest region where absorption lines form. B 10. (1 pt) Energy gets through this region via the “random walk.” D 11. (1 pt) Magnetic fields from Sun’s interior poke out in these photospheric dark regions. A 12. (1 pt) The “boiling” m ...
The Mighty Hunter in the Winter Sky By Shannon Jackson
... Five constellations are always in our northern sky. Other groupings appear seasonally, and then disappear as they fall below the horizon. There are five constellations, however, which seem to circle Polaris (po LAR us), also known as the North Star. The North Star always stays put while the other st ...
... Five constellations are always in our northern sky. Other groupings appear seasonally, and then disappear as they fall below the horizon. There are five constellations, however, which seem to circle Polaris (po LAR us), also known as the North Star. The North Star always stays put while the other st ...
AST 301 Introduction to Astronomy - University of Texas Astronomy
... because the protons must be moving fast to get close enough together so they can be attracted by the strong force before their electrical repulsion pushes them apart. If the center of a star is too hot, fusion will run faster than energy is being radiated from the surface. But the high temperature w ...
... because the protons must be moving fast to get close enough together so they can be attracted by the strong force before their electrical repulsion pushes them apart. If the center of a star is too hot, fusion will run faster than energy is being radiated from the surface. But the high temperature w ...
Lecture 33: The Lives of Stars Astronomy 141
... The more massive a star is, the shorter its lifetime. Low-Mass stars are long-lived, spend some time as Red Giants, then leave behind a White Dwarf. Very high-mass stars have very short lives, spend a short time as red supergiants, then explode as a supernova. ...
... The more massive a star is, the shorter its lifetime. Low-Mass stars are long-lived, spend some time as Red Giants, then leave behind a White Dwarf. Very high-mass stars have very short lives, spend a short time as red supergiants, then explode as a supernova. ...
Test - Scioly.org
... D. Secondary Minimum E. Orbital Secondary 56. If the entire X-Axis (as strictly measured on the graph) spans 1.641 units, calculate the approximate period and frequency of the described binary system. A. Period: .876; Frequency: 1.14 B. Period: .853; Frequency: 1.17 C. Period: .821; Frequency: 1.21 ...
... D. Secondary Minimum E. Orbital Secondary 56. If the entire X-Axis (as strictly measured on the graph) spans 1.641 units, calculate the approximate period and frequency of the described binary system. A. Period: .876; Frequency: 1.14 B. Period: .853; Frequency: 1.17 C. Period: .821; Frequency: 1.21 ...
Stellar Evolution – Life of a Star
... Stellar Evolution – Life of a Star • White Dwarfs are also burning, but these stars burn heavier elements (e.g. C). Each burning creates and burns a heavier element (e.g, Ne, O, Si, S and Fe). The burning raises the core temperature and each elemental burning period is shorter than the previous. Fu ...
... Stellar Evolution – Life of a Star • White Dwarfs are also burning, but these stars burn heavier elements (e.g. C). Each burning creates and burns a heavier element (e.g, Ne, O, Si, S and Fe). The burning raises the core temperature and each elemental burning period is shorter than the previous. Fu ...
Option E Sum Pages
... used. This is the distance travelled by light in one year (= 60 x 60 x 24 x 365 seconds = 31536000s) so 1 ly = 3.00 x 108 ms-1 x 31536000s = 9.46 x 1015 m The nearest stars are 4 ly (Alpha Centauri, a triple star) and 6 ly (Barnard's star) from us. For comparison, Earth is about 8 light minutes from ...
... used. This is the distance travelled by light in one year (= 60 x 60 x 24 x 365 seconds = 31536000s) so 1 ly = 3.00 x 108 ms-1 x 31536000s = 9.46 x 1015 m The nearest stars are 4 ly (Alpha Centauri, a triple star) and 6 ly (Barnard's star) from us. For comparison, Earth is about 8 light minutes from ...
17_LectureOutline
... diagram, a pattern begins to form: These are the 80 closest stars to us; note the dashed lines of constant radius. ...
... diagram, a pattern begins to form: These are the 80 closest stars to us; note the dashed lines of constant radius. ...
Mr. Traeger`s Light and Stars PowerPoint
... and magnetism working together. The Blue arrows show the electric field and the red arrows show the magnetic field. The fields are perpendicular to each other and to the direction of the wave. ...
... and magnetism working together. The Blue arrows show the electric field and the red arrows show the magnetic field. The fields are perpendicular to each other and to the direction of the wave. ...
Slide 1
... diagram, a pattern begins to form: These are the 80 closest stars to us; note the dashed lines of constant radius. ...
... diagram, a pattern begins to form: These are the 80 closest stars to us; note the dashed lines of constant radius. ...
Sirius Astronomer - Orange County Astronomers
... As I'm sure you know, this is the first President’s message in a long time. It is also my first, for which I apologize. My job has kept me so busy these last few months; I haven’t been able to write to you all. But, let’s get started… I’ve had the pleasure of being an OCA member for several years. I ...
... As I'm sure you know, this is the first President’s message in a long time. It is also my first, for which I apologize. My job has kept me so busy these last few months; I haven’t been able to write to you all. But, let’s get started… I’ve had the pleasure of being an OCA member for several years. I ...
Black Hole
... gas back into the interstellar medium. This is a total of more than 1 billion M or more than 1 % of the mass of the Galaxy. ...
... gas back into the interstellar medium. This is a total of more than 1 billion M or more than 1 % of the mass of the Galaxy. ...
A105 Stars and Galaxies
... Constraints on star systems: 1) Old enough to allow time for evolution (rules out high-mass stars - 1%) 2) Need to have stable orbits (might rule out binary/multiple star systems - 50%) 3) Size of “habitable zone”: region in which a planet of the right size could have liquid water on its surface. Ev ...
... Constraints on star systems: 1) Old enough to allow time for evolution (rules out high-mass stars - 1%) 2) Need to have stable orbits (might rule out binary/multiple star systems - 50%) 3) Size of “habitable zone”: region in which a planet of the right size could have liquid water on its surface. Ev ...
The Milky Way - University of North Texas
... molecular clouds. b. Lower main sequence stars have much longer lifetimes than upper main sequence stars. c. High-mass main sequence stars lose mass and become lower main sequence stars. d. Both a and b above. e. All of the above. ...
... molecular clouds. b. Lower main sequence stars have much longer lifetimes than upper main sequence stars. c. High-mass main sequence stars lose mass and become lower main sequence stars. d. Both a and b above. e. All of the above. ...
Phys 100 – Astronomy (Dr. Ilias Fernini) Review Questions for
... a. operates at a slightly lower temperature than the proton-proton chain. b. is most efficient in a star less massive than the sun. c. occurs when carbon and oxygen combine to form nitrogen, which produces energy. d. produces the energy responsible for bipolar flows. * e. combines four hydrogen nucl ...
... a. operates at a slightly lower temperature than the proton-proton chain. b. is most efficient in a star less massive than the sun. c. occurs when carbon and oxygen combine to form nitrogen, which produces energy. d. produces the energy responsible for bipolar flows. * e. combines four hydrogen nucl ...
Foundation 1 - Discovering Astronomy
... When core hydrogen fusion ceases, a main-sequence star becomes a giant • When hydrogen fusion ceases in the core, the star will collapse inward – this causes the layer just outside the core to become so hot and dense that hydrogen fusion will begin in this outer layer. • The energy produced by hydr ...
... When core hydrogen fusion ceases, a main-sequence star becomes a giant • When hydrogen fusion ceases in the core, the star will collapse inward – this causes the layer just outside the core to become so hot and dense that hydrogen fusion will begin in this outer layer. • The energy produced by hydr ...
black hole
... This wobble may be caused by the combined gravitational pull of two planets with 67 and 98 day orbital periods. ...
... This wobble may be caused by the combined gravitational pull of two planets with 67 and 98 day orbital periods. ...
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.