Chpt12a
... binary star system. If the stars are close enough together then material from one star can be pulled off by the other star. The material then forms an accretion disk before the material falls to the surface. If enough hydrogen gets dumped on a white dwarf star, then eventually the material will expl ...
... binary star system. If the stars are close enough together then material from one star can be pulled off by the other star. The material then forms an accretion disk before the material falls to the surface. If enough hydrogen gets dumped on a white dwarf star, then eventually the material will expl ...
Star Life Cycle and classroom textbooks for research!
... How does our sun compare in size and temp. to other stars? What phase in the life cycle of a star is our sun in right now? What is the next phase of our sun’s life cycle? How long will it be before our sun becomes this type of star? How long (in years) is the typical lifetime of a star? Where are th ...
... How does our sun compare in size and temp. to other stars? What phase in the life cycle of a star is our sun in right now? What is the next phase of our sun’s life cycle? How long will it be before our sun becomes this type of star? How long (in years) is the typical lifetime of a star? Where are th ...
Birth and Life of a Star
... What is a star? A star is a really hot ball of gas, with hydrogen fusing into helium at its core. Stars spend the majority of their lives fusing hydrogen, and when the hydrogen fuel is gone, stars fuse helium into carbon. The more massive stars can fuse carbon into even heavier elements, which is wh ...
... What is a star? A star is a really hot ball of gas, with hydrogen fusing into helium at its core. Stars spend the majority of their lives fusing hydrogen, and when the hydrogen fuel is gone, stars fuse helium into carbon. The more massive stars can fuse carbon into even heavier elements, which is wh ...
Birth and Life of a Star
... What is a star? A star is a really hot ball of gas, with hydrogen fusing into helium at its core. Stars spend the majority of their lives fusing hydrogen, and when the hydrogen fuel is gone, stars fuse helium into carbon. The more massive stars can fuse carbon into even heavier elements, which is wh ...
... What is a star? A star is a really hot ball of gas, with hydrogen fusing into helium at its core. Stars spend the majority of their lives fusing hydrogen, and when the hydrogen fuel is gone, stars fuse helium into carbon. The more massive stars can fuse carbon into even heavier elements, which is wh ...
Solar System and Astronomy puzzle 001
... the galaxy that contains the Earth 11. lost its status as a planet in 2006 when it was reclassified as a dwarf planet 14. interstellar cloud of dust, hydrogen, helium and other ionized gases ...
... the galaxy that contains the Earth 11. lost its status as a planet in 2006 when it was reclassified as a dwarf planet 14. interstellar cloud of dust, hydrogen, helium and other ionized gases ...
Astronomy 12: Introduction to Astronomy
... b. The ejected envelope of a red giant that was formed from a sun-type star. c. The disk of material around a protostar that will eventually form planetary system. d. The initial massive gas cloud that stars and planets are formed from. 7. A white dwarf found in a binary system suddenly brightens, s ...
... b. The ejected envelope of a red giant that was formed from a sun-type star. c. The disk of material around a protostar that will eventually form planetary system. d. The initial massive gas cloud that stars and planets are formed from. 7. A white dwarf found in a binary system suddenly brightens, s ...
Stellar Classification and Evolution What is a star? A cloud of gas
... Determines the life cycle of a star and how ______________ it will last ...
... Determines the life cycle of a star and how ______________ it will last ...
Stars and Space - science
... • Particles gather under gravity to form a protostar. • The protostar becomes denser and hotter. If it reaches a point where hydrogen and other atoms fuse – huge amounts of energy (including light) are released and a star is born! AQA Science © Nelson Thornes Ltd 2006 ...
... • Particles gather under gravity to form a protostar. • The protostar becomes denser and hotter. If it reaches a point where hydrogen and other atoms fuse – huge amounts of energy (including light) are released and a star is born! AQA Science © Nelson Thornes Ltd 2006 ...
Slide 1
... 1. The womb: Stars are born in dense molecular clouds. --The interstellar medium must be dense enough so H atoms can collide and form H2 molecules. This also is facilitated on dust--for other molecules as well. It increases gravitation enough for stars to form in reasonable time. --Different sized c ...
... 1. The womb: Stars are born in dense molecular clouds. --The interstellar medium must be dense enough so H atoms can collide and form H2 molecules. This also is facilitated on dust--for other molecules as well. It increases gravitation enough for stars to form in reasonable time. --Different sized c ...
CBradleyLoutl
... . Most of a star is hydrogen, less than a quarter is helium, maybe 1 part per thousand will be heavier elements. . Looking at what wavelengths of light are present on emission/absorption spectra will tell exact constituents. Examples: - Age: . For a star around one solar mass, it takes a few million ...
... . Most of a star is hydrogen, less than a quarter is helium, maybe 1 part per thousand will be heavier elements. . Looking at what wavelengths of light are present on emission/absorption spectra will tell exact constituents. Examples: - Age: . For a star around one solar mass, it takes a few million ...
The Life of Stars
... blood, and the carbon in our apple pies were all made in the interior of collapsing stars. We are made of ...
... blood, and the carbon in our apple pies were all made in the interior of collapsing stars. We are made of ...
Lecture 16
... Suppose the universe contained only lowmass stars. Would elements heavier than carbon exist? A. Yes, all stars create heavier elements than carbon when they become a supernova. B. Yes, but there would be far fewer heavier elements because high-mass stars form elements like iron far more prolificall ...
... Suppose the universe contained only lowmass stars. Would elements heavier than carbon exist? A. Yes, all stars create heavier elements than carbon when they become a supernova. B. Yes, but there would be far fewer heavier elements because high-mass stars form elements like iron far more prolificall ...
Ch.21 Stars, Galaxies, and the Universe Section 3: Lives of Stars
... High-mass stars quickly evolve into brilliant supergiants When a supergiant runs out of fuel, it can explode suddenly The supernovas can become part of a nebula This nebula can then contract to form a new, partly recycled star o Neutron Stars: are the remains of high-mass stars They are ev ...
... High-mass stars quickly evolve into brilliant supergiants When a supergiant runs out of fuel, it can explode suddenly The supernovas can become part of a nebula This nebula can then contract to form a new, partly recycled star o Neutron Stars: are the remains of high-mass stars They are ev ...
Science Centre Talk
... 25 neutrinos = all extragalactic neutrino astronomy...confirms core-collapse model (and limits neutrino mass) ...
... 25 neutrinos = all extragalactic neutrino astronomy...confirms core-collapse model (and limits neutrino mass) ...
Our Community`s Place Among the Stars
... All that remains is the hot, dense core (about the size of Earth) White dwarfs are very hot, but not bright (lower left corner of HR ...
... All that remains is the hot, dense core (about the size of Earth) White dwarfs are very hot, but not bright (lower left corner of HR ...
Chapter #10 Question #27: (c) Four individual protons. During
... This statement makes sense. Massive stars fuse higher elements in their core during their death. The final result is an iron core which is released to the interstellar space during a high mass star supernova. A massive star supernova that blew up before the formation of the solar system would have r ...
... This statement makes sense. Massive stars fuse higher elements in their core during their death. The final result is an iron core which is released to the interstellar space during a high mass star supernova. A massive star supernova that blew up before the formation of the solar system would have r ...
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 ...
Stages in the Life of a Star
... Stellar Nucleosynthesis--creating heavier elements (heavier than Helium) from lighter elements in stars. Lowest mass stars can only synthesize Helium. Stars around the mass of our Sun can synthesize Helium and Carbon. Massive stars with M > 5Msun can synthesize Helium, Carbon, Oxygen, etc; all the w ...
... Stellar Nucleosynthesis--creating heavier elements (heavier than Helium) from lighter elements in stars. Lowest mass stars can only synthesize Helium. Stars around the mass of our Sun can synthesize Helium and Carbon. Massive stars with M > 5Msun can synthesize Helium, Carbon, Oxygen, etc; all the w ...
NAME___________ _PERIOD____DATE_____________ 29.3
... occurs during the formation of a star. What is the correct label for the blank in the diagram? ...
... occurs during the formation of a star. What is the correct label for the blank in the diagram? ...
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.