Star Types
... Most stars appear on the Main Sequence, where stars appear to obey a Mass-Luminosity relation: L M3.5 For example, if the mass of a star is doubled, its luminosity increases by a factor 23.5 ~ 11. Thus, stars like Sirius that are about twice as massive as the Sun are about 11 times as luminous. Th ...
... Most stars appear on the Main Sequence, where stars appear to obey a Mass-Luminosity relation: L M3.5 For example, if the mass of a star is doubled, its luminosity increases by a factor 23.5 ~ 11. Thus, stars like Sirius that are about twice as massive as the Sun are about 11 times as luminous. Th ...
L19-Review2
... Study the last quiz (questions will be similar) Note that your paper is far more important Don’t panic ...
... Study the last quiz (questions will be similar) Note that your paper is far more important Don’t panic ...
File
... popular name but smaller than a constellation 12. Explain precession and what it means in the future - slow movement of the axis of a spinning body around another axis due to a torque (such as gravitational influence) acting to change the direction of the first axis – it means that we will have a ne ...
... popular name but smaller than a constellation 12. Explain precession and what it means in the future - slow movement of the axis of a spinning body around another axis due to a torque (such as gravitational influence) acting to change the direction of the first axis – it means that we will have a ne ...
Fifth - Department of Physics and Astronomy
... wind material up and creates a shells. • When the photosphere of the heating star passes the ~25,000-K mark the swept up shell is ionized and can be seen in forbidden ...
... wind material up and creates a shells. • When the photosphere of the heating star passes the ~25,000-K mark the swept up shell is ionized and can be seen in forbidden ...
White Dwarf
... • The end of the sun will be a small, hot star that will last until the remaining material burns up. ...
... • The end of the sun will be a small, hot star that will last until the remaining material burns up. ...
Lecture103002
... Imagine a clock falling into black hole Appears to run slower – longer between ticks Appears to slow down its fall ...
... Imagine a clock falling into black hole Appears to run slower – longer between ticks Appears to slow down its fall ...
The Milky Way
... than what we actually went over in class. • You ARE responsible for understanding the topics covered in class (including details in the book that I may not have mentioned). • You are NOT responsible for other stuff in these chapters not covered at all in lecture. ...
... than what we actually went over in class. • You ARE responsible for understanding the topics covered in class (including details in the book that I may not have mentioned). • You are NOT responsible for other stuff in these chapters not covered at all in lecture. ...
Sea Star Water Vascular System activity
... explain why the water vascular system is unique in echinoderms. 3. What are 3 functions other than movement, of the water vascular system? 4. Write the order of flow of water through the system from the Madreporite (start) to the Tube Feet. 5. Explain why a sea star cannot move when it is out of the ...
... explain why the water vascular system is unique in echinoderms. 3. What are 3 functions other than movement, of the water vascular system? 4. Write the order of flow of water through the system from the Madreporite (start) to the Tube Feet. 5. Explain why a sea star cannot move when it is out of the ...
Chapter 2 Knowing the Heavens
... What is so special about the North Star? 4. Are the same stars visible from any location on Earth? 5. What causes the seasons? Why are they opposite in the northern and southern hemispheres? 6. Has the same star always been the North Star? 7. Can we use the rising and setting of the Sun as the basis ...
... What is so special about the North Star? 4. Are the same stars visible from any location on Earth? 5. What causes the seasons? Why are they opposite in the northern and southern hemispheres? 6. Has the same star always been the North Star? 7. Can we use the rising and setting of the Sun as the basis ...
Properties of Stars
... Death of Medium-Mass Stars • Stars with masses similar to the sun evolve in essentially the same way as low-mass stars. • During their collapse from red giants to white dwarfs, mediummass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called plane ...
... Death of Medium-Mass Stars • Stars with masses similar to the sun evolve in essentially the same way as low-mass stars. • During their collapse from red giants to white dwarfs, mediummass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called plane ...
Problem set 1 1. The binding energy per nucleon for 56Fe is 8.8MeV
... 1. The binding energy per nucleon for 56 Fe is 8.8 MeV per nucleon. Estimate the total energy released per kilogram of matter by the sequence of reactions which fuse hydrogen to iron. 2. The main sequence of the Pleiades cluster of stars consists of stars with mass less than 6M ; the more massive s ...
... 1. The binding energy per nucleon for 56 Fe is 8.8 MeV per nucleon. Estimate the total energy released per kilogram of matter by the sequence of reactions which fuse hydrogen to iron. 2. The main sequence of the Pleiades cluster of stars consists of stars with mass less than 6M ; the more massive s ...
Week 9 Concept Summary - UC Berkeley Astronomy w
... emitting blackbody radiation, but generating no new energy. Since they are held up by degeneracy pressure, there is a maximum mass beyond which gravity would overcome this pressure. Called the Chandrasekhar Limit, no white dwarf can be larger than 1.4 times the mass of the sun. (e) High-Mass Star De ...
... emitting blackbody radiation, but generating no new energy. Since they are held up by degeneracy pressure, there is a maximum mass beyond which gravity would overcome this pressure. Called the Chandrasekhar Limit, no white dwarf can be larger than 1.4 times the mass of the sun. (e) High-Mass Star De ...
Star Maps and Constellations (pdf 3.7 Megs)
... C. Magnitudes Stars are not all the same brightness. The Greek astronomer Hipparchus (160-127 B.C.) invented the scheme of classifying stars by their brightness where the brightest were first magnitude, the next brightest second magnitude, and the faintest visible stars were sixth magnitude. ...
... C. Magnitudes Stars are not all the same brightness. The Greek astronomer Hipparchus (160-127 B.C.) invented the scheme of classifying stars by their brightness where the brightest were first magnitude, the next brightest second magnitude, and the faintest visible stars were sixth magnitude. ...
North Star
... Cosmic wreckage from the detonation of a massive star is the subject of this official first image from NASA's Chandra X-ray Observatory. ...
... Cosmic wreckage from the detonation of a massive star is the subject of this official first image from NASA's Chandra X-ray Observatory. ...
Diapositiva 1
... Explanation: The Cat’s Eye Nebula (NGC 6543) is one of the best known planetary nebulae in the sky. Its haunting symmetries are seen in the very central region of this stunning false-color picture, processed to reveal the enormous but extremely faint halo of gaseous material, over three lightyears a ...
... Explanation: The Cat’s Eye Nebula (NGC 6543) is one of the best known planetary nebulae in the sky. Its haunting symmetries are seen in the very central region of this stunning false-color picture, processed to reveal the enormous but extremely faint halo of gaseous material, over three lightyears a ...
The Life Cycle of Stars Stars are a fascinating part of our universe
... expanding stars enter “old age” and leave the main sequence. Smaller stars become red giants, while larger stars become super giants. Once the atoms in a red giant are depleted (used up), the star collapses under the force of gravity and becomes an extremely hot white dwarf. Super giants begin to ra ...
... expanding stars enter “old age” and leave the main sequence. Smaller stars become red giants, while larger stars become super giants. Once the atoms in a red giant are depleted (used up), the star collapses under the force of gravity and becomes an extremely hot white dwarf. Super giants begin to ra ...
giant molecular clouds
... Open Clusters of Stars (2) Large, dense cluster of (yellow and red) stars in the foreground; ~ 50 million years old ...
... Open Clusters of Stars (2) Large, dense cluster of (yellow and red) stars in the foreground; ~ 50 million years old ...
16. Properties of Stars
... But the Universe is 1.37 x 1010 yr old! Every M dwarf that was ever created is still on the main sequence!! ...
... But the Universe is 1.37 x 1010 yr old! Every M dwarf that was ever created is still on the main sequence!! ...
Lyra
Lyra (/ˈlaɪərə/; Latin for lyre, from Greek λύρα) is a small constellation. It is one of 48 listed by the 2nd century astronomer Ptolemy, and is one of the 88 constellations recognized by the International Astronomical Union. Lyra was often represented on star maps as a vulture or an eagle carrying a lyre, and hence sometimes referred to as Aquila Cadens or Vultur Cadens. Beginning at the north, Lyra is bordered by Draco, Hercules, Vulpecula, and Cygnus. Lyra is visible from the northern hemisphere from spring through autumn, and nearly overhead, in temperate latitudes, during the summer months. From the southern hemisphere, it is visible low in the northern sky during the winter months.The lucida or brightest star—and one of the brightest stars in the sky—is the white main sequence star Vega, a corner of the Summer Triangle. Beta Lyrae is the prototype of a class of stars known as Beta Lyrae variables, binary stars so close to each other that they become egg-shaped and material flows from one to the other. Epsilon Lyrae, known informally as the Double Double, is a complex multiple star system. Lyra also hosts the Ring Nebula, the second-discovered and best-known planetary nebula.