08 October: Stellar life after the Main Sequence
... Hydrogen mass fraction in core at start: 71%, now: 34% ...
... Hydrogen mass fraction in core at start: 71%, now: 34% ...
Chapter 17 Tour: Formation of the Solar System
... REGIONS ON THE SUN’S SURFACE, RELATED TO CHANGES IN THE MAGNETIC PROPERTIES OF THE SUN ...
... REGIONS ON THE SUN’S SURFACE, RELATED TO CHANGES IN THE MAGNETIC PROPERTIES OF THE SUN ...
Lecture 3 - QUB Astrophysics Research Centre
... point in the Sun. In summary, with no knowledge of how energy is generated in stars we have been able to derive a value for the Sun’s internal temperature and deduce that it is composed of a near ideal gas plasma with negligible radiation pressure ...
... point in the Sun. In summary, with no knowledge of how energy is generated in stars we have been able to derive a value for the Sun’s internal temperature and deduce that it is composed of a near ideal gas plasma with negligible radiation pressure ...
Part 1
... (C) iron has the lowest mass per nuclear particle of all nuclei. (D) massive stars go supernova before they create an iron core. (E) iron turns into rust when mixed with oxygen. ...
... (C) iron has the lowest mass per nuclear particle of all nuclei. (D) massive stars go supernova before they create an iron core. (E) iron turns into rust when mixed with oxygen. ...
PowerPoint version is here
... Solar Neutrino Experiments--Summary Standard solar model vs. Expt. Bahcall and Pinsonneault, 2000 ...
... Solar Neutrino Experiments--Summary Standard solar model vs. Expt. Bahcall and Pinsonneault, 2000 ...
Properties of Stars: The H
... We can also determine the abundances of many elements in stars by using the `atomic fingerprints’ seen in spectral absorption lines. This is a tricky business! We already know that the strength and even presence of absorption lines is strongly temperature dependent. To use absorption line strengths ...
... We can also determine the abundances of many elements in stars by using the `atomic fingerprints’ seen in spectral absorption lines. This is a tricky business! We already know that the strength and even presence of absorption lines is strongly temperature dependent. To use absorption line strengths ...
The SUN
... The Northern Lights are caused by the sun’s flares. The sun is middle ager it is around four and a half million years ago. ...
... The Northern Lights are caused by the sun’s flares. The sun is middle ager it is around four and a half million years ago. ...
neutrino
... • Current!energy!output!of!Sun!requires!600! million!tons!of!hydrogen!fused!into!helium! every!second! • That’s!a!lot,!but!only!a!very!;ny!frac;on!of!the! total!mass!available! • Sun!can!sustain!this!rate!of!fusion!for!another! 5!billion!years! ...
... • Current!energy!output!of!Sun!requires!600! million!tons!of!hydrogen!fused!into!helium! every!second! • That’s!a!lot,!but!only!a!very!;ny!frac;on!of!the! total!mass!available! • Sun!can!sustain!this!rate!of!fusion!for!another! 5!billion!years! ...
Chapter 12. Basic Equations of Stellar Structure
... could not have been life on this planet for longer than that, since life requires sunlight to exist. The geologists and biologists of that era were sure, however, that the slow processes of geologic and biologic evolution required billions of years to occur, not millions, so there was a problem! A s ...
... could not have been life on this planet for longer than that, since life requires sunlight to exist. The geologists and biologists of that era were sure, however, that the slow processes of geologic and biologic evolution required billions of years to occur, not millions, so there was a problem! A s ...
The Solar System Mr J and Miss Mac The Solar System is made up
... Everything in the Solar System orbits or revolves around the Sun. The Sun contains around 98% of all the material in the Solar System. The larger an object is, the more gravity it has. Because the Sun is so large, its powerful gravity attracts all the other objects in the Solar System towards it. At ...
... Everything in the Solar System orbits or revolves around the Sun. The Sun contains around 98% of all the material in the Solar System. The larger an object is, the more gravity it has. Because the Sun is so large, its powerful gravity attracts all the other objects in the Solar System towards it. At ...
Vignette 2 Gravitational Perturbations and the Prediction of New
... numerator of the expression for the strength of the gravitational force, and 2) the objects are near each other, which minimizes the denominator of the force equation. The two-body approximation that the orbits of the planets are determined only by the gravitational interaction between the sun and t ...
... numerator of the expression for the strength of the gravitational force, and 2) the objects are near each other, which minimizes the denominator of the force equation. The two-body approximation that the orbits of the planets are determined only by the gravitational interaction between the sun and t ...
As a nebula
... temperature of white dwarf stars higher or lower than red super giants? • Higher • White dwarfs have a temp of about 20,000 K while super giants have a temperature of about 3500K. A. Most of the stars on the HR Diagram are classified as which type of star? ...
... temperature of white dwarf stars higher or lower than red super giants? • Higher • White dwarfs have a temp of about 20,000 K while super giants have a temperature of about 3500K. A. Most of the stars on the HR Diagram are classified as which type of star? ...
Powerpoint of lecture 14
... Section 6: Introduction to Stellar Evolution Lecture 14 – Main-sequence stellar structure: … mass dependence of energy generation, opacity, convection zones, density profile … mass limits … effects of composition changes Post-main-sequence evolution: … calculations and observational tests ...
... Section 6: Introduction to Stellar Evolution Lecture 14 – Main-sequence stellar structure: … mass dependence of energy generation, opacity, convection zones, density profile … mass limits … effects of composition changes Post-main-sequence evolution: … calculations and observational tests ...
Black Holes, Part 3, Dark Energy
... One of the measured evidence is, that the Sun's mass density is a thousand times too low for the Sun to be a hydrogen gas sphere. Just look at the comparison. In comparing Saturn with Jupiter, Jupiter that has nearly twice the volume, has also nearly twice the mass density. In comparison with Jupit ...
... One of the measured evidence is, that the Sun's mass density is a thousand times too low for the Sun to be a hydrogen gas sphere. Just look at the comparison. In comparing Saturn with Jupiter, Jupiter that has nearly twice the volume, has also nearly twice the mass density. In comparison with Jupit ...
Astronomy 12 - hrsbstaff.ednet.ns.ca
... hydrogen, and that the Sun's current mass was its mass before main-sequence burning. You will use some known properties of the Sun, and the knowledge that the Sun fuses hydrogen into helium. (i) From the internet, find the mass (in kg) and luminosity (in Watts) of the Sun. (ii) The Sun's principal r ...
... hydrogen, and that the Sun's current mass was its mass before main-sequence burning. You will use some known properties of the Sun, and the knowledge that the Sun fuses hydrogen into helium. (i) From the internet, find the mass (in kg) and luminosity (in Watts) of the Sun. (ii) The Sun's principal r ...
Unit 3 - Lesson 8.1 2011 Night Sky
... Getting Started in Space Space is fun to explore. What do you already know? Answer the following questions. 1. What is a star? 2. Can you see a planet without a telescope? 3. You are looking into the night sky and think you see a planet. How do you know it is a planet and not a star? Provide two re ...
... Getting Started in Space Space is fun to explore. What do you already know? Answer the following questions. 1. What is a star? 2. Can you see a planet without a telescope? 3. You are looking into the night sky and think you see a planet. How do you know it is a planet and not a star? Provide two re ...
File
... 1. Be in orbit around a star (such as the Sun) 2. Have enough mass to be pulled into a stable sphere shape by gravity 3. Dominate its orbit (i.e., its mass must be greater than anything else that crosses its orbit) ...
... 1. Be in orbit around a star (such as the Sun) 2. Have enough mass to be pulled into a stable sphere shape by gravity 3. Dominate its orbit (i.e., its mass must be greater than anything else that crosses its orbit) ...
Mathematics and Cosmos
... (26,000 yr cycle) – Eccentricity (varies from 0.00 to 0.06 with 100,000 and 400,000 yr cycles) – Axis tilt (varies from 24.5o to 21.5o with 41,000 yr cycle Milutin Milankovitch 1920 ...
... (26,000 yr cycle) – Eccentricity (varies from 0.00 to 0.06 with 100,000 and 400,000 yr cycles) – Axis tilt (varies from 24.5o to 21.5o with 41,000 yr cycle Milutin Milankovitch 1920 ...
chapter14Sol
... • Sunspots http://en.wikipedia.org/wiki/Sunspots • Solar Flares http://en.wikipedia.org/wiki/Solar_flares • Solar Prominences http://en.wikipedia.org/wiki/Solar_Prominence • All are related to magnetic fields http://en.wikipedia.org/wiki/Magnetic_field ...
... • Sunspots http://en.wikipedia.org/wiki/Sunspots • Solar Flares http://en.wikipedia.org/wiki/Solar_flares • Solar Prominences http://en.wikipedia.org/wiki/Solar_Prominence • All are related to magnetic fields http://en.wikipedia.org/wiki/Magnetic_field ...
here
... b) Chromoshpere and Solar Flares: The part just above the photosphere is called the chromosphere. It is this sphere that gives the sun the redish colour. The chromopshere is the sun’s atmosphere. Sometimes this atmosphere erupts into violent stomrs sending part of the chromsphere into space. These ...
... b) Chromoshpere and Solar Flares: The part just above the photosphere is called the chromosphere. It is this sphere that gives the sun the redish colour. The chromopshere is the sun’s atmosphere. Sometimes this atmosphere erupts into violent stomrs sending part of the chromsphere into space. These ...
