Stellar Evolution Slideshow
... After a star explodes, sometimes only neutrons are left (Guess where the name “Neutron Stars” came from?) Also called Pulsars because they emit radio waves with incredible regularity. Appear to be rapidly rotating neutron star ...
... After a star explodes, sometimes only neutrons are left (Guess where the name “Neutron Stars” came from?) Also called Pulsars because they emit radio waves with incredible regularity. Appear to be rapidly rotating neutron star ...
Chapter 30.1
... Circumpolar: stars that never go below the horizon. (Circling stars). Different stars become visible during different seasons. Three actual motions: ...
... Circumpolar: stars that never go below the horizon. (Circling stars). Different stars become visible during different seasons. Three actual motions: ...
Vocabulary Review
... a star that has collapsed under gravity to the point that the electrons and protons have smashed together to form neutrons ...
... a star that has collapsed under gravity to the point that the electrons and protons have smashed together to form neutrons ...
Dust Clouds at the Center of Milky Way
... • In our Milky Way and in external galaxies, the space between the stars is filled with an interstellar medium consisting of gas and dust ...
... • In our Milky Way and in external galaxies, the space between the stars is filled with an interstellar medium consisting of gas and dust ...
The correct answers are written in bold, italic and underlined. The
... • a white dwarf star that has cooled to a low temperature over its long lifetime. Stars with masses less that 8% of that of the Sun remain as long-lived, dim brown objects, never brightening like a main-sequence star. 15. Why have few, if any, stars with greater than about 120 solar masses ever been ...
... • a white dwarf star that has cooled to a low temperature over its long lifetime. Stars with masses less that 8% of that of the Sun remain as long-lived, dim brown objects, never brightening like a main-sequence star. 15. Why have few, if any, stars with greater than about 120 solar masses ever been ...
The Life Cycles of Stars
... the core. This ring is called a planetary nebula. When the last of the helium atoms in the core are fused into carbon atoms, the medium size star begins to die. Gravity causes the last of the star’s matter to collapse inward and compact. This is the white dwarf stage. At this stage, the star’s matte ...
... the core. This ring is called a planetary nebula. When the last of the helium atoms in the core are fused into carbon atoms, the medium size star begins to die. Gravity causes the last of the star’s matter to collapse inward and compact. This is the white dwarf stage. At this stage, the star’s matte ...
Stellar Evolution Notes
... luminosity, and diameter Hydrostatic Equilibrium – the balance between gravity squeezing inward and pressure from nuclear fusion and radiation pushing outward ...
... luminosity, and diameter Hydrostatic Equilibrium – the balance between gravity squeezing inward and pressure from nuclear fusion and radiation pushing outward ...
TU Muscae and the Early-type Overcontact Binaries
... High-mass stars evolve faster than low mass stars But in Algols the less massive star is evolved. How is that possible? Mass transfer! The low mass star was once the more massive star, evolved, and dumped matter onto the other star, eventually reversing the mass ratio. ...
... High-mass stars evolve faster than low mass stars But in Algols the less massive star is evolved. How is that possible? Mass transfer! The low mass star was once the more massive star, evolved, and dumped matter onto the other star, eventually reversing the mass ratio. ...
Review3-2016
... Asteroid, meteorites and comets. What is the asteroid belt, how we believe it was formed and where it is located? What are the size distribution of the asteroids. Compare the size of the largest asteroid with the planet Pluto. What is the composition of a meteorite. What is the structure of a comet? ...
... Asteroid, meteorites and comets. What is the asteroid belt, how we believe it was formed and where it is located? What are the size distribution of the asteroids. Compare the size of the largest asteroid with the planet Pluto. What is the composition of a meteorite. What is the structure of a comet? ...
The Sun and Stardust
... How are other elements made? Massive stars burn their hydrogen (and helium and carbon-nitrogen-oxygen) very quickly. At the end of their life heavier (metals) are formed such as vanadium, chromium, manganese, iron, cobalt, and nickel etc. Then massive stars (about ten times more massive than the Su ...
... How are other elements made? Massive stars burn their hydrogen (and helium and carbon-nitrogen-oxygen) very quickly. At the end of their life heavier (metals) are formed such as vanadium, chromium, manganese, iron, cobalt, and nickel etc. Then massive stars (about ten times more massive than the Su ...
The Hertzsprung – Russell Diagram
... Very bright, red in color, very large, cool in temperature Brightness of stars are due to their enormous size ...
... Very bright, red in color, very large, cool in temperature Brightness of stars are due to their enormous size ...
Galaxies - Where Science Meets Life
... brightness of stars on a graph. Two years later, an American astronomer named Henry Norris Russell created similar graphs. Their research was combined to form what is now called the Hertzsprung-Russell diagram, or HR diagram. ...
... brightness of stars on a graph. Two years later, an American astronomer named Henry Norris Russell created similar graphs. Their research was combined to form what is now called the Hertzsprung-Russell diagram, or HR diagram. ...
Science Olympiad - UNC Physics and Astronomy
... request this poster http://chandra.harvard.edu/edu/request.html ...
... request this poster http://chandra.harvard.edu/edu/request.html ...
Starbirth and Interstellar Matter
... B. in groups within dark clouds. C. as companions to massive stars. D. one at a time out of giant molecular clouds. 9. Which of these statements is NOT true of the formation of massive stars? A. They form from material in the giant molecular clouds. B. They form quickly, in less than a million years ...
... B. in groups within dark clouds. C. as companions to massive stars. D. one at a time out of giant molecular clouds. 9. Which of these statements is NOT true of the formation of massive stars? A. They form from material in the giant molecular clouds. B. They form quickly, in less than a million years ...
Abstract Submitted for the PHY599 Meeting of
... The Ages of Stars STEFAN WALTER, Stony Brook University — In my talk I will speak about one of the most fundamental properties of a star, namely its age. The motivation to determine a star’s age is that it allows the study of the time evolution of astronomical phenomena related to stars and their su ...
... The Ages of Stars STEFAN WALTER, Stony Brook University — In my talk I will speak about one of the most fundamental properties of a star, namely its age. The motivation to determine a star’s age is that it allows the study of the time evolution of astronomical phenomena related to stars and their su ...
Ch. 27 Stars & Galaxies
... • Scientists have developed theories about the evolution of stars by studying stars in different stages of development. ...
... • Scientists have developed theories about the evolution of stars by studying stars in different stages of development. ...
Star Formation/Llfe Cycle Notes
... c. Known as Protostar of YSO, before it reaches main sequence d. Center of protostar gets dense enough and therefore hot enough (3000K+) to become luminous, however not visible due to exterior of gas and dust surrounding it. 3) Phophids- YSO’s starting to disk a. start to get charged particles 4) Ea ...
... c. Known as Protostar of YSO, before it reaches main sequence d. Center of protostar gets dense enough and therefore hot enough (3000K+) to become luminous, however not visible due to exterior of gas and dust surrounding it. 3) Phophids- YSO’s starting to disk a. start to get charged particles 4) Ea ...
Chapter 28 Vocabulary
... Main sequence star - A star that is at the point in its life cycle in which it is actively fusing hydrogen nuclei into helium nuclei; also the band of the Hertzsprun-Russell diagram depicting such stars. ...
... Main sequence star - A star that is at the point in its life cycle in which it is actively fusing hydrogen nuclei into helium nuclei; also the band of the Hertzsprun-Russell diagram depicting such stars. ...
Lecture 4: Molecular Clouds (1)
... The existence of dense molecular clouds was one of the first clues to understand the formation of stars •First identified as dark nebulae by William and Caroline Herschel (Herschel, 1785), but is was not until photographic observations of Barnard (1919) and Wolf (1923) were these objects established ...
... The existence of dense molecular clouds was one of the first clues to understand the formation of stars •First identified as dark nebulae by William and Caroline Herschel (Herschel, 1785), but is was not until photographic observations of Barnard (1919) and Wolf (1923) were these objects established ...
Fusion in the Sun
... 4. Red Giant- hydrogen atoms are almost gone, the outer shell of gases expands and grows larger. 5. Nebula/Supernova- small mass stars lose their outer shell and return to a nebula, large mass stars explode into a supernova. 6. White Dwarf/Black Hole- the core of small mass stars slowly burns out, t ...
... 4. Red Giant- hydrogen atoms are almost gone, the outer shell of gases expands and grows larger. 5. Nebula/Supernova- small mass stars lose their outer shell and return to a nebula, large mass stars explode into a supernova. 6. White Dwarf/Black Hole- the core of small mass stars slowly burns out, t ...
STARS
... • The nearest star to Earth is the Sun, which is the source of most of the energy on Earth. • Stars are big exploding balls of gas, that are mostly hydrogen and helium. • A star begins as a collapsing cloud of material composed primarily of hydrogen, along with helium and trace amounts of heavier el ...
... • The nearest star to Earth is the Sun, which is the source of most of the energy on Earth. • Stars are big exploding balls of gas, that are mostly hydrogen and helium. • A star begins as a collapsing cloud of material composed primarily of hydrogen, along with helium and trace amounts of heavier el ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.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.