of the star. - Colyton High School
... 3. Fusion stops, temperature drops and gas pressure decreases, no longer in equilibrium. 4. Core contracts (gravity WINS by pulling atoms in). 5. Increased temperature (more atoms, more collisions) and gas pressure in the core reinitiates nuclear fusion, equilibrium is achieved, and the cycle begins ...
... 3. Fusion stops, temperature drops and gas pressure decreases, no longer in equilibrium. 4. Core contracts (gravity WINS by pulling atoms in). 5. Increased temperature (more atoms, more collisions) and gas pressure in the core reinitiates nuclear fusion, equilibrium is achieved, and the cycle begins ...
O star
... spectral type and the luminosity class of a star from its spectrum. This is extraordinarily valuable, as it means that, just from the spectrum of a star, one can plot it in on the H-R diagram. BUT: if you can plot a star on the H-R diagram, you know its absolute magnitude! And if you know its absolu ...
... spectral type and the luminosity class of a star from its spectrum. This is extraordinarily valuable, as it means that, just from the spectrum of a star, one can plot it in on the H-R diagram. BUT: if you can plot a star on the H-R diagram, you know its absolute magnitude! And if you know its absolu ...
The Origin of the Solar System
... observed today as dust disks of T Tauri stars. Sun and our Solar system formed ~ 4.6 billion years ago. ...
... observed today as dust disks of T Tauri stars. Sun and our Solar system formed ~ 4.6 billion years ago. ...
powerpoints - Georgia Southern University Astrophysics
... Type II remnants because the progenitors are different. Type Ia remnants from white dwarfs - usually show relatively strong Si, S, Ar, Ca, and Fe, and weak O, Ne, and Mg lines; Type II remnants - from massive stars generally have the reverse pattern. In addition to the composition of the ejecta, spe ...
... Type II remnants because the progenitors are different. Type Ia remnants from white dwarfs - usually show relatively strong Si, S, Ar, Ca, and Fe, and weak O, Ne, and Mg lines; Type II remnants - from massive stars generally have the reverse pattern. In addition to the composition of the ejecta, spe ...
Homework 5 (stellar properties)
... 6. (3 pts.) What two observations/measurements would you make to classify a star according to its luminosity (i.e., luminosity class, e.g., Ia, Ib, II, III, IV, or V)? (Hint: Look at the HR diagram.) Which equation relates these two quantities to the size (radius) of a star (after all, the luminosit ...
... 6. (3 pts.) What two observations/measurements would you make to classify a star according to its luminosity (i.e., luminosity class, e.g., Ia, Ib, II, III, IV, or V)? (Hint: Look at the HR diagram.) Which equation relates these two quantities to the size (radius) of a star (after all, the luminosit ...
Image Credit: NASA,ESA, HEIC, Hubble
... – Giant Molecular Clouds. Cool clouds of H2 (molecular hydrogen) and some CO. – When do they collapse? • Pressure wave from Supernova or or collision between clouds or other compressing event.. • Gas must be slow moving (little KE) to collapse ...
... – Giant Molecular Clouds. Cool clouds of H2 (molecular hydrogen) and some CO. – When do they collapse? • Pressure wave from Supernova or or collision between clouds or other compressing event.. • Gas must be slow moving (little KE) to collapse ...
1. setting the scene 2. the cosmic dark ages and the first stars
... and helium, will later undergo further cycles of star formation. The presence of carbon, oxygen and other heavy elements in the gas allows the formation of more normal stars, including some low mass ones whose lifetimes are longer than the age of the Universe. Some of these stars are still around us ...
... and helium, will later undergo further cycles of star formation. The presence of carbon, oxygen and other heavy elements in the gas allows the formation of more normal stars, including some low mass ones whose lifetimes are longer than the age of the Universe. Some of these stars are still around us ...
Lecture (Powerpoint)
... As Earth becomes massive enough to trap gases, atmosphere forms as colliding objects (lateaccreting material) are vaporized Volatile elements (lightest and easiest to vaporize) can most easily diffuse away ...
... As Earth becomes massive enough to trap gases, atmosphere forms as colliding objects (lateaccreting material) are vaporized Volatile elements (lightest and easiest to vaporize) can most easily diffuse away ...
Stars in Their Youth
... stars the CNO cycle is the dominant energy generation mechanism, and this process is very sensitive to temperature. Therefore, the energy production more centrally concentrated, leading to steep temperature gradients. The above mentioned characteristics of stars in the main sequence are summarized i ...
... stars the CNO cycle is the dominant energy generation mechanism, and this process is very sensitive to temperature. Therefore, the energy production more centrally concentrated, leading to steep temperature gradients. The above mentioned characteristics of stars in the main sequence are summarized i ...
The Milky Way Galaxy is Heading for a Major Cosmic Collision
... First described by astronomers >1000 years ago ...
... First described by astronomers >1000 years ago ...
File
... CLASS COPY!!! CLASS COPY!!! CLASS COPY!!! CLASS COPY!!! HR STAR DIAGRAM OBJECTIVE: Compare a stars color, temperature, brightness, and size to its spectral class. PURPOSE: Plot stars according to brightness and temperature to create an HR diagram. PROCEDURES: 1. Study the star data table on the back ...
... CLASS COPY!!! CLASS COPY!!! CLASS COPY!!! CLASS COPY!!! HR STAR DIAGRAM OBJECTIVE: Compare a stars color, temperature, brightness, and size to its spectral class. PURPOSE: Plot stars according to brightness and temperature to create an HR diagram. PROCEDURES: 1. Study the star data table on the back ...
The Dynamics of the Galaxies in the Local Group
... One of few galaxies that can be seen with naked eye First described by astronomers >1000 years ago ...
... One of few galaxies that can be seen with naked eye First described by astronomers >1000 years ago ...
hubble amazing universe worksheet
... and ____________________, and gasses are assigned colors. Blue is ___________, and green is ___________________. 8. This region is _____________ light years across! 9. Hubble even showed a star about to die! As a star runs out of ______________, it expands, and it is released into space. 10. Someday ...
... and ____________________, and gasses are assigned colors. Blue is ___________, and green is ___________________. 8. This region is _____________ light years across! 9. Hubble even showed a star about to die! As a star runs out of ______________, it expands, and it is released into space. 10. Someday ...
star - TeacherWeb
... Light from stars that are moving toward the Earth is shifted slightly toward the blue end of the spectrum. When a source of light (like a star) is stationary, the wavelengths of light remain the same distance apart. When a source of light is moving toward you, the wavelengths of light get closer tog ...
... Light from stars that are moving toward the Earth is shifted slightly toward the blue end of the spectrum. When a source of light (like a star) is stationary, the wavelengths of light remain the same distance apart. When a source of light is moving toward you, the wavelengths of light get closer tog ...
THE HR DIAGRAM
... spectral class O9 indicating an age of ~14 million years. The Pleiades cluster’s turnoff point is at about B6, for a cluster age of ~100 million years. The turnoff for the Hyades cluster occurs at about A3 with an age of ~650 million years. Finally, NGC 188’s turnoff at about F5 indicates a ~7 bi ...
... spectral class O9 indicating an age of ~14 million years. The Pleiades cluster’s turnoff point is at about B6, for a cluster age of ~100 million years. The turnoff for the Hyades cluster occurs at about A3 with an age of ~650 million years. Finally, NGC 188’s turnoff at about F5 indicates a ~7 bi ...
NIE10x301Sponsor Thank You (Page 1)
... divided into elliptical and spiral galaxies. Our own Milky Way is a pretty typical spiral containing ~200 billion stars in spiral arms making up a flat disk 100,000 light years (ly) across and 2500 ly thick, and a central bulge of older stars perhaps 16,000 ly thick. The Sun is 28,000 ly from the ce ...
... divided into elliptical and spiral galaxies. Our own Milky Way is a pretty typical spiral containing ~200 billion stars in spiral arms making up a flat disk 100,000 light years (ly) across and 2500 ly thick, and a central bulge of older stars perhaps 16,000 ly thick. The Sun is 28,000 ly from the ce ...
Stellar kinematics
Stellar kinematics is the study of the movement of stars without needing to understand how they acquired their motion. This differs from stellar dynamics, which takes into account gravitational effects. The motion of a star relative to the Sun can provide useful information about the origin and age of a star, as well as the structure and evolution of the surrounding part of the Milky Way.In astronomy, it is widely accepted that most stars are born within molecular clouds known as stellar nurseries. The stars formed within such a cloud compose open clusters containing dozens to thousands of members. These clusters dissociate over time. Stars that separate themselves from the cluster's core are designated as members of the cluster's stellar association. If the remnant later drifts through the Milky Way as a coherent assemblage, then it is termed a moving group.