Star Light, Star Bright
... without the use of a telescope, but you can only see a fraction of them from any particular viewing point at any particular time. With the help of a powerful telescope, it's possible to see more than 3 billion of the hundreds of billions of stars in our Milky Way Galaxy. ...
... without the use of a telescope, but you can only see a fraction of them from any particular viewing point at any particular time. With the help of a powerful telescope, it's possible to see more than 3 billion of the hundreds of billions of stars in our Milky Way Galaxy. ...
STARS
... Lets use the sun, our nearest star as an example. It is a self luminous, gaseous sphere. It has no solid surface. Its size is about 100 times the Earth and its mass is about 300,000 times that of the Earth. Its core temperature is 27 million degrees Fahrenheit and its visible surface is 10,000 degr ...
... Lets use the sun, our nearest star as an example. It is a self luminous, gaseous sphere. It has no solid surface. Its size is about 100 times the Earth and its mass is about 300,000 times that of the Earth. Its core temperature is 27 million degrees Fahrenheit and its visible surface is 10,000 degr ...
H Exhaustion - University of Arizona
... produce enough L in shell to support envelope move to RGB on H burning timescales • Sun will spend ~4 Gyr moving from core H exhaustion to RGB - 40% of total H consumption and lifetime ...
... produce enough L in shell to support envelope move to RGB on H burning timescales • Sun will spend ~4 Gyr moving from core H exhaustion to RGB - 40% of total H consumption and lifetime ...
Monday, December 8 - Otterbein University
... on the night of December 1 in the northern hemisphere. How would this view change if you were to look towards south at midnight a month earlier? a. You would have the same view as on December 1 because it still is autumn. b. Aries would have been in the South because the stars rise earlier in the Ea ...
... on the night of December 1 in the northern hemisphere. How would this view change if you were to look towards south at midnight a month earlier? a. You would have the same view as on December 1 because it still is autumn. b. Aries would have been in the South because the stars rise earlier in the Ea ...
Sample pages 2 PDF
... dies slowly and in a relatively uneventful way as a white dwarf. As we are interested in how the chemical elements of life form, and become available for planets, this sequence of events is not very relevant, because the heavier elements in Table 2.1 were not formed and what elements were formed rem ...
... dies slowly and in a relatively uneventful way as a white dwarf. As we are interested in how the chemical elements of life form, and become available for planets, this sequence of events is not very relevant, because the heavier elements in Table 2.1 were not formed and what elements were formed rem ...
STATE UNIVERSITY OF NEW YORK COLLEGE OF TECHNOLOGY CANTON, NEW YORK
... B. Motion of the fixed stars, constellations, and the Celestial Sphere C. Phases of the Moon D. Motion of the Sun and the planets defines the ecliptic and the Zodiac Historical perspective on the co-evolution of Astronomy and Physics A. Contributions by the ancient Greeks B. Heliocentric and G ...
... B. Motion of the fixed stars, constellations, and the Celestial Sphere C. Phases of the Moon D. Motion of the Sun and the planets defines the ecliptic and the Zodiac Historical perspective on the co-evolution of Astronomy and Physics A. Contributions by the ancient Greeks B. Heliocentric and G ...
GIZMO H-RDiagramSE
... characteristics such as color, size, temperature, and luminosity—or how bright a star is. However, astronomers did not yet understand exactly how these characteristics were related. Using the H-R Diagram Gizmo™, you will discover some of these relationships on your own. Start by moving your cursor o ...
... characteristics such as color, size, temperature, and luminosity—or how bright a star is. However, astronomers did not yet understand exactly how these characteristics were related. Using the H-R Diagram Gizmo™, you will discover some of these relationships on your own. Start by moving your cursor o ...
Section 4.4: Where did the elements come from?
... Right after the big bang, temperatures were so high that only energy could exist. As the universe expanded, it cooled and protons and neutrons, and electrons condensed out of the energy. Further cooling caused these particles to coalesce into hydrogen and helium atoms. Over time, huge clouds of hydr ...
... Right after the big bang, temperatures were so high that only energy could exist. As the universe expanded, it cooled and protons and neutrons, and electrons condensed out of the energy. Further cooling caused these particles to coalesce into hydrogen and helium atoms. Over time, huge clouds of hydr ...
Sample Midterm - IUPUI Physics
... 1) A) For a brief period after the Hydrogen in a core of a star is all fused to Helium where does the energy that a star needs to survive come from (before it starts to fuse Helium) and how does that affect the size and temperature of the surface of the star? B) What is the process by which Helium ( ...
... 1) A) For a brief period after the Hydrogen in a core of a star is all fused to Helium where does the energy that a star needs to survive come from (before it starts to fuse Helium) and how does that affect the size and temperature of the surface of the star? B) What is the process by which Helium ( ...
HR diagram ppt
... Luminosity- a star’s ACTUAL brightness. It depends on the size and temperature. *DISTANCE FROM EARTH IS NOT A FACTOR! Absolute magnitude- measure of how bright stars would be if they were the same distance from Earth Example) What if I held a light bulb in front of your face and then walked across ...
... Luminosity- a star’s ACTUAL brightness. It depends on the size and temperature. *DISTANCE FROM EARTH IS NOT A FACTOR! Absolute magnitude- measure of how bright stars would be if they were the same distance from Earth Example) What if I held a light bulb in front of your face and then walked across ...
Properties of Stars in general
... • It thus burns its Hydrogen fuel 45,000 time faster. • But its mass (= fuel supply) is only ~ 17 times that of our Sun. • So its life cannot be so long: ~ 17/45,000 that of our Sun ************* ...
... • It thus burns its Hydrogen fuel 45,000 time faster. • But its mass (= fuel supply) is only ~ 17 times that of our Sun. • So its life cannot be so long: ~ 17/45,000 that of our Sun ************* ...
Formation of the Universe
... contracts a huge explosion occurs. Depending on the size of the star, this explosion is called a nova or supernova. These explosions are so large that they outshine their entire galaxy. Most of these large stars become neutron stars, which are made of incredibly dense material and continue to give o ...
... contracts a huge explosion occurs. Depending on the size of the star, this explosion is called a nova or supernova. These explosions are so large that they outshine their entire galaxy. Most of these large stars become neutron stars, which are made of incredibly dense material and continue to give o ...
DOC - Cool Cosmos
... The way stars live and die makes a lot of sense if you consider what a star really is. Simply put, a star is a large amount of gas and dust that is collapsing under the force of gravity. At first, this crush of gravity makes the inside of the star hot enough to ignite a nuclear explosion. This explo ...
... The way stars live and die makes a lot of sense if you consider what a star really is. Simply put, a star is a large amount of gas and dust that is collapsing under the force of gravity. At first, this crush of gravity makes the inside of the star hot enough to ignite a nuclear explosion. This explo ...
(AU): Average distance from Earth to Sun
... turn to gas when heated by the sun • Heating by sun forms a tail, which is blown away from sun by solar ...
... turn to gas when heated by the sun • Heating by sun forms a tail, which is blown away from sun by solar ...
L and T Dwarfs - Indiana University
... radiation trapped by extra dust-grain opacity • Heating dissociates H2O, giving weaker water bands • Dust settles gravitationally, depleting metals and leaving ...
... radiation trapped by extra dust-grain opacity • Heating dissociates H2O, giving weaker water bands • Dust settles gravitationally, depleting metals and leaving ...
14-black-holes
... • At the center of the black hole, the gravitational force is infinite. • Light inside a certain radius cannot escape the gravitational force. – Schwartzchild radius – Imaginary surface at this radius is the event horizon – Light inside this event horizon would orbit the black hole. – 3 solar mass b ...
... • At the center of the black hole, the gravitational force is infinite. • Light inside a certain radius cannot escape the gravitational force. – Schwartzchild radius – Imaginary surface at this radius is the event horizon – Light inside this event horizon would orbit the black hole. – 3 solar mass b ...
Stellar evolution
Stellar evolution is the process by which a star changes during its lifetime. Depending on the mass of the star, this lifetime ranges from a few million years for the most massive to trillions of years for the least massive, which is considerably longer than the age of the universe. The table shows the lifetimes of stars as a function of their masses. All stars are born from collapsing clouds of gas and dust, often called nebulae or molecular clouds. Over the course of millions of years, these protostars settle down into a state of equilibrium, becoming what is known as a main-sequence star.Nuclear fusion powers a star for most of its life. Initially the energy is generated by the fusion of hydrogen atoms at the core of the main-sequence star. Later, as the preponderance of atoms at the core becomes helium, stars like the Sun begin to fuse hydrogen along a spherical shell surrounding the core. This process causes the star to gradually grow in size, passing through the subgiant stage until it reaches the red giant phase. Stars with at least half the mass of the Sun can also begin to generate energy through the fusion of helium at their core, whereas more-massive stars can fuse heavier elements along a series of concentric shells. Once a star like the Sun has exhausted its nuclear fuel, its core collapses into a dense white dwarf and the outer layers are expelled as a planetary nebula. Stars with around ten or more times the mass of the Sun can explode in a supernova as their inert iron cores collapse into an extremely dense neutron star or black hole. Although the universe is not old enough for any of the smallest red dwarfs to have reached the end of their lives, stellar models suggest they will slowly become brighter and hotter before running out of hydrogen fuel and becoming low-mass white dwarfs.Stellar evolution is not studied by observing the life of a single star, as most stellar changes occur too slowly to be detected, even over many centuries. Instead, astrophysicists come to understand how stars evolve by observing numerous stars at various points in their lifetime, and by simulating stellar structure using computer models.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.