Measuring Stars
... Since Type Ia Supernovae involve an explosion that occurs around a fixed mass (1.4Mʘ ), they are a very homogeneous events, and have about the same luminosity. So they are like standard candles, wherever they occur, they have the same intrinsic luminosity. If we see a type Ia supernova somewhere (in ...
... Since Type Ia Supernovae involve an explosion that occurs around a fixed mass (1.4Mʘ ), they are a very homogeneous events, and have about the same luminosity. So they are like standard candles, wherever they occur, they have the same intrinsic luminosity. If we see a type Ia supernova somewhere (in ...
Today`s Powerpoint
... If a large moon, held together by gravity, gets too close to Saturn, the tidal force breaks it apart into small pieces. The radius where this happens is called the Roche Limit. Total mass of ring particles equivalent to 250 km moon. Perhaps a collision between moons sent one inwards this way, or a ...
... If a large moon, held together by gravity, gets too close to Saturn, the tidal force breaks it apart into small pieces. The radius where this happens is called the Roche Limit. Total mass of ring particles equivalent to 250 km moon. Perhaps a collision between moons sent one inwards this way, or a ...
Some space objects are visible to the human eye.
... your bare eyes are part of a galaxy called the Milky Way. A galaxy is a group of millions or billions of stars held together by their own gravity. If the solar system were the size of a penny, the Milky Way would stretch from Chicago to Dallas. Most stars in the Milky Way are so far away that our ga ...
... your bare eyes are part of a galaxy called the Milky Way. A galaxy is a group of millions or billions of stars held together by their own gravity. If the solar system were the size of a penny, the Milky Way would stretch from Chicago to Dallas. Most stars in the Milky Way are so far away that our ga ...
Instructor Notes
... The very first stars would have had no heavy elements, and they would have been massive – so they are exactly the type of stars that are born quickly, live fast, and die spectacularly, spewing heavier elements out into the universe via supernova explosions. Lower mass stars would have formed in a re ...
... The very first stars would have had no heavy elements, and they would have been massive – so they are exactly the type of stars that are born quickly, live fast, and die spectacularly, spewing heavier elements out into the universe via supernova explosions. Lower mass stars would have formed in a re ...
The Dramatic Lives of Stars
... Young stars are called “Pre-main sequence” stars. They sit to the upper right of the main sequence in an HR diagram. ...
... Young stars are called “Pre-main sequence” stars. They sit to the upper right of the main sequence in an HR diagram. ...
Lecture 19 - Stellar Lifecycles
... the core. The Sun then converts Helium into Carbon & Oxygen. The surface temperature of the Sun increases and it The motion of the Sun through the becomes a Yellow Giant. H-R diagram as the Sun ages. Notice • This stage lasts as long as that the Sun spends most of its life on there is Helium availab ...
... the core. The Sun then converts Helium into Carbon & Oxygen. The surface temperature of the Sun increases and it The motion of the Sun through the becomes a Yellow Giant. H-R diagram as the Sun ages. Notice • This stage lasts as long as that the Sun spends most of its life on there is Helium availab ...
Stars - cmamath
... stopped. After the white dwarf has completely cooled, it becomes a black dwarf which is a dead star that no longer shines. ...
... stopped. After the white dwarf has completely cooled, it becomes a black dwarf which is a dead star that no longer shines. ...
Summary: Stellar Distances
... Interstellar dust makes stars look redder over long distances Temperatures can also be inferred from the appearance of a star’s spectrum - the pattern of spectral lines. This spectral typing is not affected by interstellar dust. Surface temperatures of stars almost all lie between 40,000°K for the “ ...
... Interstellar dust makes stars look redder over long distances Temperatures can also be inferred from the appearance of a star’s spectrum - the pattern of spectral lines. This spectral typing is not affected by interstellar dust. Surface temperatures of stars almost all lie between 40,000°K for the “ ...
Search for Student Research Assistant
... What is the project and what would the student do? In August, ultraviolet observations from the Hubble Space Telescope of this star system became public. The main investigator told me he is looking to study the gas in front of the star, and not the star itself, so that we are not duplicating his ef ...
... What is the project and what would the student do? In August, ultraviolet observations from the Hubble Space Telescope of this star system became public. The main investigator told me he is looking to study the gas in front of the star, and not the star itself, so that we are not duplicating his ef ...
File - Physical Science
... particles”), but the entire gas as a whole has no electric charge, and if the density is not too high, then we can get ...
... particles”), but the entire gas as a whole has no electric charge, and if the density is not too high, then we can get ...
BrainPOP - The Science Spot
... 4. A red giant star has a _____________ that has cooled and glows red. It burns helium and fuses it into heavier _____________. Since these reactions are not as powerful as burning hydrogen, the star starts to _____________ after about 10 __________ years. 5. What happens after this point depends on ...
... 4. A red giant star has a _____________ that has cooled and glows red. It burns helium and fuses it into heavier _____________. Since these reactions are not as powerful as burning hydrogen, the star starts to _____________ after about 10 __________ years. 5. What happens after this point depends on ...
Document
... whereas models using those same theories pace mass loss at the order of 10-7 solar masses per year There was degeneracy in the models between different masses and levels of convective core overshooting Where is Polaris on the Stellar Evolution path o Observed rates of period change are consisten ...
... whereas models using those same theories pace mass loss at the order of 10-7 solar masses per year There was degeneracy in the models between different masses and levels of convective core overshooting Where is Polaris on the Stellar Evolution path o Observed rates of period change are consisten ...
AST 301 Introduction to Astronomy - University of Texas Astronomy
... When helium fusion starts generating energy in the core of a red giant, the core expands and hydrogen fusion in the shell around the core slows down. As a result, less total energy is being generated, and the envelope contracts and warms up some. But pretty soon all of the helium in the core is conv ...
... When helium fusion starts generating energy in the core of a red giant, the core expands and hydrogen fusion in the shell around the core slows down. As a result, less total energy is being generated, and the envelope contracts and warms up some. But pretty soon all of the helium in the core is conv ...
Class II Supernova
... Supernova? •It will produce as much energy in it’s time span, then the sun will in its lifetime. •It is not uncommon for a supernova to outshine an entire galaxy. •Quite rare, but sometimes 1 supernova will trigger another one to start. •A type II must have from 3-9 solar masses. ...
... Supernova? •It will produce as much energy in it’s time span, then the sun will in its lifetime. •It is not uncommon for a supernova to outshine an entire galaxy. •Quite rare, but sometimes 1 supernova will trigger another one to start. •A type II must have from 3-9 solar masses. ...
Galaxy Formation and Evolution Open Problems
... • moderately old stars with low specific angular momentum. • Wide range of metallicity • Triaxial shape (central bar) • Central supermassive BH Stellar Halo • 109 old and metal poor stars (Pop.II) • 150 globular clusters (13 Gyr) • <0.2% Galaxy mass, 2% of the light •Dark Halo ...
... • moderately old stars with low specific angular momentum. • Wide range of metallicity • Triaxial shape (central bar) • Central supermassive BH Stellar Halo • 109 old and metal poor stars (Pop.II) • 150 globular clusters (13 Gyr) • <0.2% Galaxy mass, 2% of the light •Dark Halo ...
New light on our Sun`s fate - Space Telescope Science Institute
... began to wonder how stars evolve and thought that perhaps they “move” across the H-R diagram. Over decades, we’ve learned that a star’s mass controls its life; along the way, that property also determines its brightness and temperature. We now summarize all stages of stellar evolution on this import ...
... began to wonder how stars evolve and thought that perhaps they “move” across the H-R diagram. Over decades, we’ve learned that a star’s mass controls its life; along the way, that property also determines its brightness and temperature. We now summarize all stages of stellar evolution on this import ...
Stellar Physics - University of Reading
... Classical Mechanics and Optics Thermodynamics and Statistical Mechanics Atomic and Molecular Physics Ideas from Observational Astronomy ...
... Classical Mechanics and Optics Thermodynamics and Statistical Mechanics Atomic and Molecular Physics Ideas from Observational Astronomy ...
PDF copy
... years away from the earth. It contains a supergiant star, about 25 times as massive as our Sun, and a compressed dead partn about twice as massive as the Sun but compressed to a diameter of just about 30 km. the stars orbit around each other in 4.9 ...
... years away from the earth. It contains a supergiant star, about 25 times as massive as our Sun, and a compressed dead partn about twice as massive as the Sun but compressed to a diameter of just about 30 km. the stars orbit around each other in 4.9 ...
PDF version - Caltech Astronomy
... mapping of the cosmic microwave background. The WMAP data were, until just a few months ago, embargoed pending the publication of a full year’s set of observations.4 (See PHYSICS TODAY, April 2003, page 21.) As soon as the data were released, new theoretical analyses began to appear within days on t ...
... mapping of the cosmic microwave background. The WMAP data were, until just a few months ago, embargoed pending the publication of a full year’s set of observations.4 (See PHYSICS TODAY, April 2003, page 21.) As soon as the data were released, new theoretical analyses began to appear within days on t ...
Stars - Mike Brotherton
... • We can get masses of stars by measuring how they move in binary systems according to Newton’s Law of Gravitation. • I’ll save some of the details for exo-solar planets session. Plenty of other things to ...
... • We can get masses of stars by measuring how they move in binary systems according to Newton’s Law of Gravitation. • I’ll save some of the details for exo-solar planets session. Plenty of other things to ...
AST 301 Introduction to Astronomy - University of Texas Astronomy
... The extra energy going out from the core+shell will make the envelope (the outer part of the star) expand and cool off. ...
... The extra energy going out from the core+shell will make the envelope (the outer part of the star) expand and cool off. ...