Presentation for perspective graduate students 2006
... •A) There is sufficient hydrogen •B) The density is sufficiently low for the high temperature atoms to build up enough energy to collide and undergo fusion •C) The temperature is low enough and the density is high enough to allow Hydrogen atoms to collide with each other often enough for fusion to o ...
... •A) There is sufficient hydrogen •B) The density is sufficiently low for the high temperature atoms to build up enough energy to collide and undergo fusion •C) The temperature is low enough and the density is high enough to allow Hydrogen atoms to collide with each other often enough for fusion to o ...
The Corona
... The Sun’s radius is 695,508 km, 109 times as large as Earth’s radius. The Sun has a lower density (about 1,409 g/cm3). Which is a quarter of the average density of Earth. It has about 333,000 times the Earth’s mass. It generates 3,83x1026 joules of energy every second. All of this energy is generate ...
... The Sun’s radius is 695,508 km, 109 times as large as Earth’s radius. The Sun has a lower density (about 1,409 g/cm3). Which is a quarter of the average density of Earth. It has about 333,000 times the Earth’s mass. It generates 3,83x1026 joules of energy every second. All of this energy is generate ...
Our Star the Sun
... process by which two or more atoms are joined together or fused to form a larger more massive element. ► In the case of the Sun…. Hydrogen (H) atoms are fused together to form helium (He). ► During this process a lot of energy is produced and released. ...
... process by which two or more atoms are joined together or fused to form a larger more massive element. ► In the case of the Sun…. Hydrogen (H) atoms are fused together to form helium (He). ► During this process a lot of energy is produced and released. ...
Stars Take Center Stage in
... most useful tools for his invesJuri Toomre and Benjamin Brown, University of Colorado tigations. “Simulations are our eyes for thinking,” he says. “They provide insights and give us hints about the dynamics in the sun.” Working with doctoral researcher Ben Brown, Toomre's research on the Ranger supe ...
... most useful tools for his invesJuri Toomre and Benjamin Brown, University of Colorado tigations. “Simulations are our eyes for thinking,” he says. “They provide insights and give us hints about the dynamics in the sun.” Working with doctoral researcher Ben Brown, Toomre's research on the Ranger supe ...
Slides from the second lecture
... radius, which is related to the transport of energy from the core to the surface. – Radiation: the photons carry the energy as they move through the star, and are absorbed at a rate that depends on the opacity. Slow – Convection: buoyant, hot mass will rise. Very efficient where it works. – Conducti ...
... radius, which is related to the transport of energy from the core to the surface. – Radiation: the photons carry the energy as they move through the star, and are absorbed at a rate that depends on the opacity. Slow – Convection: buoyant, hot mass will rise. Very efficient where it works. – Conducti ...
15 September: Basic properties of the Sun
... • Described the Sun’s size (diameter), mass, chemical composition, and temperature • Today, additional features as preparation for solar observing lab ...
... • Described the Sun’s size (diameter), mass, chemical composition, and temperature • Today, additional features as preparation for solar observing lab ...
Coursework 7 File
... that this is the typical energy associated with collisions between hydrogen nuclei at the centre of the Sun, leading to fusion reactions, calculate the distance of closest approach between two hydrogen nuclei, using the conservation of energy principle. The temperature at the centre of the Sun is ap ...
... that this is the typical energy associated with collisions between hydrogen nuclei at the centre of the Sun, leading to fusion reactions, calculate the distance of closest approach between two hydrogen nuclei, using the conservation of energy principle. The temperature at the centre of the Sun is ap ...
Why do the stars shine?
... t=(1.3 x 1052 ergs)/4 x 1033 ergs/sec = 3.2 x 1018 sec x (1 yr./3.1 x 107 sec) • Or 1011 years (only ~10% of H needs to be burned) • 20 times the apparent age of Earth! • So, nuclear reactions could explain the above discrepancy. ...
... t=(1.3 x 1052 ergs)/4 x 1033 ergs/sec = 3.2 x 1018 sec x (1 yr./3.1 x 107 sec) • Or 1011 years (only ~10% of H needs to be burned) • 20 times the apparent age of Earth! • So, nuclear reactions could explain the above discrepancy. ...
Lecture notes 4: The Sun as a Star i
... gas emits more vigorously than low temperature gas. Should we expect that the color of the light is different at the limb and at sun center? The existense of absorption lines is a consequence of the same phenomenon: and is due two physical effects 1. A continuum of photons with various wavelengths flow ...
... gas emits more vigorously than low temperature gas. Should we expect that the color of the light is different at the limb and at sun center? The existense of absorption lines is a consequence of the same phenomenon: and is due two physical effects 1. A continuum of photons with various wavelengths flow ...
Chapter 10 powerpoint presentation
... Although the temperatures in the Sun’s core are high, they are not high enough to overcome the coulomb repulsion force resulting from two positively charged nuclei colliding under the laws of classical physics. The solution to this problem is quantum mechanical tunneling. ...
... Although the temperatures in the Sun’s core are high, they are not high enough to overcome the coulomb repulsion force resulting from two positively charged nuclei colliding under the laws of classical physics. The solution to this problem is quantum mechanical tunneling. ...
Section 18.3 - CPO Science
... Chapter Eighteen: Earth, the Moon, and the Sun • 18.1 The Earth and Its Moon • 18.2 Earth Cycles ...
... Chapter Eighteen: Earth, the Moon, and the Sun • 18.1 The Earth and Its Moon • 18.2 Earth Cycles ...
Astronomy
... Rocky objects that revolve around the sun but are too small to be considered a planet ...
... Rocky objects that revolve around the sun but are too small to be considered a planet ...
STARS
... Jupiters, lined up edge to edge • The Sun is about 330, 000 times as massive as Earth • The Sun contains more than 99% of all the mass in the solar system ...
... Jupiters, lined up edge to edge • The Sun is about 330, 000 times as massive as Earth • The Sun contains more than 99% of all the mass in the solar system ...
Stars - Sun
... density of a star so tightly in the core that the electrons are stripped away and the bare nuclei of atoms almost touch each other. • Nuclear fusion occurs. ...
... density of a star so tightly in the core that the electrons are stripped away and the bare nuclei of atoms almost touch each other. • Nuclear fusion occurs. ...
Document
... convection, in patterns similar to those found in a pot of boiling water - hot gas rises, dumps its energy into the photosphere, and, then cooler, sinks back down. ...
... convection, in patterns similar to those found in a pot of boiling water - hot gas rises, dumps its energy into the photosphere, and, then cooler, sinks back down. ...
The Evolution of Massive Stars
... Neutron Stars: a brief history • Basic physics understood in the 1930s • At that time, no known counterparts • In the 1950s and 1960s, more and more strange objects found, but where were the neutrons stars, or did they even exist? • The case of the Crab Nebula (supernova of 1054 AD) ...
... Neutron Stars: a brief history • Basic physics understood in the 1930s • At that time, no known counterparts • In the 1950s and 1960s, more and more strange objects found, but where were the neutrons stars, or did they even exist? • The case of the Crab Nebula (supernova of 1054 AD) ...
8.2 Solar Nebula Theory and the Sun
... • If planetismals survive collisions, they may build up to full planets like those in our solar system • If their mass is >10x that of Jupiter, fusion begins and a star is formed ...
... • If planetismals survive collisions, they may build up to full planets like those in our solar system • If their mass is >10x that of Jupiter, fusion begins and a star is formed ...
Lecture02
... lensing • The Sun acts like a lens deflecting the light from stars behind it. • Galaxies can also act as lenses by deflecting light from more distant galaxies. • This gives rise to the faint arcs and streaks in this image. ...
... lensing • The Sun acts like a lens deflecting the light from stars behind it. • Galaxies can also act as lenses by deflecting light from more distant galaxies. • This gives rise to the faint arcs and streaks in this image. ...
Physical Science 1 Quiz 10 1 ID # or name:
... The intention is for each student to work independently on this quiz… you are on the honor system! ...
... The intention is for each student to work independently on this quiz… you are on the honor system! ...