Brighter than the average star?
... Many popular astronomy books start by explaining how small and unimportant our Solar System is. The famous ‘Hitchhiker’s Guide to the Galaxy’ begins by describing our own star with the words “Far out in the uncharted backwaters of the unfashionable end of the Western Spiral arm of the galaxy lies a ...
... Many popular astronomy books start by explaining how small and unimportant our Solar System is. The famous ‘Hitchhiker’s Guide to the Galaxy’ begins by describing our own star with the words “Far out in the uncharted backwaters of the unfashionable end of the Western Spiral arm of the galaxy lies a ...
Stars and Galaxies
... 16. The nearer an object is to the observer, the greater its _______________________. 17. __________________ can be used to measure distance from Earth of relatively close stars. 18. Distances in space are measured in _____________________. 19. A light-year is the distance __________________ travels ...
... 16. The nearer an object is to the observer, the greater its _______________________. 17. __________________ can be used to measure distance from Earth of relatively close stars. 18. Distances in space are measured in _____________________. 19. A light-year is the distance __________________ travels ...
The Realm of Physics
... • Ie. We live approximately 102 years, each year contains approximately 107 seconds, and our heart beats about 1 time per second. So, your heart beats about 109 times in your lifetime. ...
... • Ie. We live approximately 102 years, each year contains approximately 107 seconds, and our heart beats about 1 time per second. So, your heart beats about 109 times in your lifetime. ...
Scales of the Universe
... • A cloud of hydrogen gas began to gravitationally collapse. • As more gas fell in, it’s potential energy was converted into thermal energy. • Eventually the in-falling gas was hot enough to ignite nuclear fusion in the core. • Gas that continued to fall in helped to establish gravitational equilibr ...
... • A cloud of hydrogen gas began to gravitationally collapse. • As more gas fell in, it’s potential energy was converted into thermal energy. • Eventually the in-falling gas was hot enough to ignite nuclear fusion in the core. • Gas that continued to fall in helped to establish gravitational equilibr ...
PS #1 Solutions - Stars and Stellar Explosions 1. Opacity sources
... The density of the interior of the sun is significantly larger than that of water, for example, the density is ∼ 150 g/cm3 near the center of the sun. Why, then, do we treat stellar interiors as an ideal gas? The important physics here is as follows: in a gas, interparticle forces are typically unim ...
... The density of the interior of the sun is significantly larger than that of water, for example, the density is ∼ 150 g/cm3 near the center of the sun. Why, then, do we treat stellar interiors as an ideal gas? The important physics here is as follows: in a gas, interparticle forces are typically unim ...
Constellation
... of our Milky Way galaxy. Called a light echo, the expanding illumination of a dusty cloud around the star has been revealing remarkable structures ever since the star suddenly brightened for several weeks in early 2002. Though Hubble has followed the light echo in several snapshots, this new image s ...
... of our Milky Way galaxy. Called a light echo, the expanding illumination of a dusty cloud around the star has been revealing remarkable structures ever since the star suddenly brightened for several weeks in early 2002. Though Hubble has followed the light echo in several snapshots, this new image s ...
Astronomy
... 22. Which spectral class of stars (which letter) have the lowest temperature? _____________ ...
... 22. Which spectral class of stars (which letter) have the lowest temperature? _____________ ...
Phys133-Sample MT2
... A) They were produced in the Big Bang. B) They were produced inside stars. C) They evolved from hydrogen and helium shortly after the Big Bang. D) They were produced inside dense interstellar gas. E) all of the above ...
... A) They were produced in the Big Bang. B) They were produced inside stars. C) They evolved from hydrogen and helium shortly after the Big Bang. D) They were produced inside dense interstellar gas. E) all of the above ...
2016-Semester Exam-FALL-Review
... 25. Circle the reactants in the above equation. Put a rectangle around the products. 26. How many elements are shown in the above equation? 27. What is the difference between a compound and a molecule?—Give an example of each. 28. How many atoms of Na are on the reactants side? 29. How can you tell ...
... 25. Circle the reactants in the above equation. Put a rectangle around the products. 26. How many elements are shown in the above equation? 27. What is the difference between a compound and a molecule?—Give an example of each. 28. How many atoms of Na are on the reactants side? 29. How can you tell ...
Stars…Giants, Supergiants, Dwarfs….
... and pressure broadening of the spectral lines tells you that one is much larger than the other, what can you say about the relative brightnesses? ...
... and pressure broadening of the spectral lines tells you that one is much larger than the other, what can you say about the relative brightnesses? ...
The Life Cycle of a star
... • Once massive stars reach the red giant phase, the core temperature increases. • Gravity continues to pull carbon atoms together as the temperature increases forming oxygen, nitrogen, and eventually iron. • At this point, fusion stops and the iron atoms start to absorb energy. • This energy is even ...
... • Once massive stars reach the red giant phase, the core temperature increases. • Gravity continues to pull carbon atoms together as the temperature increases forming oxygen, nitrogen, and eventually iron. • At this point, fusion stops and the iron atoms start to absorb energy. • This energy is even ...
Life of stars, formation of elements
... • Many more similar starformation regions buried deep inside cloud. ...
... • Many more similar starformation regions buried deep inside cloud. ...
1 Intro to Astronomy
... gigantic spiral galaxy we call the Milky Way the Milky Way has a supermassive black hole in its center and is surrounded by 150 globular clusters and a halo of dark matter and dwarf galaxies, some of which it's eating, all of which can be seen by other galaxies in our Local Group like Andromeda and ...
... gigantic spiral galaxy we call the Milky Way the Milky Way has a supermassive black hole in its center and is surrounded by 150 globular clusters and a halo of dark matter and dwarf galaxies, some of which it's eating, all of which can be seen by other galaxies in our Local Group like Andromeda and ...
Lecture 27 (pdf from the powerpoint)
... •Estimated by Drake as 0.5. It is now known from modern planet searches that at least 10% of sunlike stars have planets, and the true proportion may be much higher, since only planets gas-giant size and larger can be detected with current technology.[3] •ne = Estimated by Drake as 2. The same paper ...
... •Estimated by Drake as 0.5. It is now known from modern planet searches that at least 10% of sunlike stars have planets, and the true proportion may be much higher, since only planets gas-giant size and larger can be detected with current technology.[3] •ne = Estimated by Drake as 2. The same paper ...
THE HR DIAGRAM
... leaving a very dense core of carbon. The outer layers drift off to become what is called a planetary nebula, which is a ring of burning hydrogen that looks like a smoke ring. The dense core is called a white dwarf. It is white because it is very hot, but a dwarf because it has a very small radius. I ...
... leaving a very dense core of carbon. The outer layers drift off to become what is called a planetary nebula, which is a ring of burning hydrogen that looks like a smoke ring. The dense core is called a white dwarf. It is white because it is very hot, but a dwarf because it has a very small radius. I ...
Supernova worksheet with solutions ()
... times more energy in the form of neutrinos and high-speed gas!) Suppose this release occurs over a ...
... times more energy in the form of neutrinos and high-speed gas!) Suppose this release occurs over a ...
Stellar Evolution: After the Main Sequence
... exhausted in the core of a main-sequence star • This leaves a core of nearly pure helium surrounded by a shell through which hydrogen fusion works its way outward in the star • The core shrinks and becomes hotter, while the star’s outer layers expand and cool • The result is a red giant star ...
... exhausted in the core of a main-sequence star • This leaves a core of nearly pure helium surrounded by a shell through which hydrogen fusion works its way outward in the star • The core shrinks and becomes hotter, while the star’s outer layers expand and cool • The result is a red giant star ...
Supernovae Type II
... the remainder resulting from subsequent steps. 5. The collapse ends when the core reaches nuclear density. Actually, the density exceeds nuclear briefly by what is estimated to be a factor of 2 to 3. ...
... the remainder resulting from subsequent steps. 5. The collapse ends when the core reaches nuclear density. Actually, the density exceeds nuclear briefly by what is estimated to be a factor of 2 to 3. ...