Astronomy 1020 Exam 1 Review Questions
... 10 times bigger than the Sun, what is its luminosity with respect to the Sun? 11. What is more energetic, a blue or a red photon? How about an X-ray versus an infrared photon? Why do you say this? 12. Describe the 3 layers of the solar atmosphere. 13. What are the 3 mechanisms in which heat energy c ...
... 10 times bigger than the Sun, what is its luminosity with respect to the Sun? 11. What is more energetic, a blue or a red photon? How about an X-ray versus an infrared photon? Why do you say this? 12. Describe the 3 layers of the solar atmosphere. 13. What are the 3 mechanisms in which heat energy c ...
PHY-105: Equations of Stellar Structure
... goes into ǫ – we first have to know what nuclear interactions occur, and at what relative rates, and then what energy production rate results from these interactions. We’ve seen this is highly dependent on temperature, so we also need to know T (r). From our knowledge of how energy is transported th ...
... goes into ǫ – we first have to know what nuclear interactions occur, and at what relative rates, and then what energy production rate results from these interactions. We’ve seen this is highly dependent on temperature, so we also need to know T (r). From our knowledge of how energy is transported th ...
Standard Solar/Stellar Model
... The interior of the Sun can be “observed” by its oscillations in brightness, size, and velocity on surface. 5-minute oscillation: a quasiTrapped acoustic waves sinusoidal radial variation in the velocity field with an amplitude of a few hundred m/s and period of 5 min, produced by trapped acoustic w ...
... The interior of the Sun can be “observed” by its oscillations in brightness, size, and velocity on surface. 5-minute oscillation: a quasiTrapped acoustic waves sinusoidal radial variation in the velocity field with an amplitude of a few hundred m/s and period of 5 min, produced by trapped acoustic w ...
Homework #1: Due in class Thursday February 2nd
... There would be no noticeable change, since photons take much longer than a day to leak out of the Sun. Eventually, the Sun would start to contract, but only very very slowly. Why does nuclear fusion require high temperatures? Atomic nuclei are positively charged, so they tend to repel each other. Th ...
... There would be no noticeable change, since photons take much longer than a day to leak out of the Sun. Eventually, the Sun would start to contract, but only very very slowly. Why does nuclear fusion require high temperatures? Atomic nuclei are positively charged, so they tend to repel each other. Th ...
Lecture 9
... • The Solar Wind is a stream of charged particles blown out from the Sun • Corona extends millions of kilometers away from the visible surface of the Sun • Chromosphere is where temp drops to about 10,000K • Photosphere is the visible surface of the Sun – At about 6,000K – Contains the Sunspots ...
... • The Solar Wind is a stream of charged particles blown out from the Sun • Corona extends millions of kilometers away from the visible surface of the Sun • Chromosphere is where temp drops to about 10,000K • Photosphere is the visible surface of the Sun – At about 6,000K – Contains the Sunspots ...
SCI 2201: Concepts in Science
... By the end of the 8th grade, students should know that Nine planets of very different size, composition, and surface features move around the sun in nearly circular orbits. Some planets have a great variety of moons and even flat rings of rock and ice particles orbiting around them. Some of these ...
... By the end of the 8th grade, students should know that Nine planets of very different size, composition, and surface features move around the sun in nearly circular orbits. Some planets have a great variety of moons and even flat rings of rock and ice particles orbiting around them. Some of these ...
Integrative Studies 410 Our Place in the Universe
... when and for how long in the Hertzsprung-Russell ...
... when and for how long in the Hertzsprung-Russell ...
The Sun and Other Stars
... 0.7% of mass is converted into energy when hydrogen becomes helium; fusion occurs only in the core, not outer areas. • Our sun contains 8.9 x 1056 hydrogen atoms, and fuses 3.7 x 1038 every second! • This results in 4 million metric tons of matter being converted into energy every second! • Larger s ...
... 0.7% of mass is converted into energy when hydrogen becomes helium; fusion occurs only in the core, not outer areas. • Our sun contains 8.9 x 1056 hydrogen atoms, and fuses 3.7 x 1038 every second! • This results in 4 million metric tons of matter being converted into energy every second! • Larger s ...
Stars and the Main Sequence
... The star will settle into a hydrostatic and thermal equilibrium, where cooling is balanced by nuclear energy generation and there is no time dependence of any state variables. ...
... The star will settle into a hydrostatic and thermal equilibrium, where cooling is balanced by nuclear energy generation and there is no time dependence of any state variables. ...
The Internal Structure of Stars Computational Mechanics Project Fall
... radius of a star are, nearly, unique functions of the mass of the star with small variations due to the chemical composition (i.e., the mass fraction of hydrogen, X, helium, Y, and heavier elements, Z.) In the early 1900's all of the basic relationships describing the structure of stars had been dev ...
... radius of a star are, nearly, unique functions of the mass of the star with small variations due to the chemical composition (i.e., the mass fraction of hydrogen, X, helium, Y, and heavier elements, Z.) In the early 1900's all of the basic relationships describing the structure of stars had been dev ...
the sun - WordPress.com
... The mass of the Sun is approximately 330,000 times greater than that of Earth. It is almost three quarters Hydrogen, whilst most of the remaining mass is Helium. ...
... The mass of the Sun is approximately 330,000 times greater than that of Earth. It is almost three quarters Hydrogen, whilst most of the remaining mass is Helium. ...
Document
... body to revolve around the sun) is proportional to its distance to the sun. The relationship is p2 = a3 If a planet has a period of 4 years, what is it’s distance to the sun in AUs? p2 = a3 ...
... body to revolve around the sun) is proportional to its distance to the sun. The relationship is p2 = a3 If a planet has a period of 4 years, what is it’s distance to the sun in AUs? p2 = a3 ...
Unit A, “Processes of Living Things”
... Unit D, “The Solar System and Beyond” Chapter 2, “The Sun and Other Stars” Lesson 1, “What Are the Features of the Sun?”, pgs. D30 – D35 Energy from the Sun The sun is Earth’s ______local star______________, which means … It is the star at the center of the solar system ...
... Unit D, “The Solar System and Beyond” Chapter 2, “The Sun and Other Stars” Lesson 1, “What Are the Features of the Sun?”, pgs. D30 – D35 Energy from the Sun The sun is Earth’s ______local star______________, which means … It is the star at the center of the solar system ...
Sun`s energy and interior
... The interior of the Sun can be “observed” by its oscillations in brightness, size, and velocity on surface. 5-minute oscillation: a quasiTrapped acoustic waves sinusoidal radial variation in the velocity field with an amplitude of a few hundred m/s and period of 5 min, produced by trapped acoustic w ...
... The interior of the Sun can be “observed” by its oscillations in brightness, size, and velocity on surface. 5-minute oscillation: a quasiTrapped acoustic waves sinusoidal radial variation in the velocity field with an amplitude of a few hundred m/s and period of 5 min, produced by trapped acoustic w ...
ASTR 1120H – Spring Semester 2010 Exam 2 – Answers The
... have been ionized by UV radiation from nearby hot stars. The hydrogen nuclei (i.e., protons) and electrons recombine in excited energy states and when the electron cascades back down toward the ground state, the transition from n = 3 to n = 2 releases Hα photons (i.e., red light). Hot stars are requ ...
... have been ionized by UV radiation from nearby hot stars. The hydrogen nuclei (i.e., protons) and electrons recombine in excited energy states and when the electron cascades back down toward the ground state, the transition from n = 3 to n = 2 releases Hα photons (i.e., red light). Hot stars are requ ...
The Solar System, Planets and Small Celestial Bodies
... Big Bang Theory • Scientific theory of the origin of the universe • 10-15 billion years ago all matter came together to one point • Due to density and high temperature a huge explosion (big bang) occurred • Since the beginning universe has been expanding • Galaxies moving away from each other ...
... Big Bang Theory • Scientific theory of the origin of the universe • 10-15 billion years ago all matter came together to one point • Due to density and high temperature a huge explosion (big bang) occurred • Since the beginning universe has been expanding • Galaxies moving away from each other ...
Document
... • The radiative zone is surrounded by a rather opaque convective zone of gas at relatively low temperature and pressure – In this zone, energy travels outward primarily through convection ...
... • The radiative zone is surrounded by a rather opaque convective zone of gas at relatively low temperature and pressure – In this zone, energy travels outward primarily through convection ...
Closed books and notes, 1 hour. Please PRINT
... Simple estimates show that the energy would run out after only a few thousand years The time scale for contraction is about 25 million years - much less than the age of the Earth Rocks on Earth have been dated as billions of years old Contraction of a star does not yield any energy The Sun’s size is ...
... Simple estimates show that the energy would run out after only a few thousand years The time scale for contraction is about 25 million years - much less than the age of the Earth Rocks on Earth have been dated as billions of years old Contraction of a star does not yield any energy The Sun’s size is ...
Today`s Powerpoint
... from the Sun and found it to be lower than expected (by 30-50%) Confirmed in subsequent experiments Theory of p-p fusion well understood Solar interior well understood ...
... from the Sun and found it to be lower than expected (by 30-50%) Confirmed in subsequent experiments Theory of p-p fusion well understood Solar interior well understood ...