WEEK 8: CSI UCSC: ASTRO EDITION SOLUTIONS This week you
... (1) What other remnant usually accompanies a white dwarf? A white dwarf, which used to be the core of the star, comes embedded in a planetary nebula, which is basically a cloud of gas that used to make up the fluffy outer layers of the red giant. (2) Which two forces are in balance for a white dwarf ...
... (1) What other remnant usually accompanies a white dwarf? A white dwarf, which used to be the core of the star, comes embedded in a planetary nebula, which is basically a cloud of gas that used to make up the fluffy outer layers of the red giant. (2) Which two forces are in balance for a white dwarf ...
Test 1, Feb. 2, 2016 - Brock physics
... 7. About one quarter of material in a nebula is (a) dust. (b) hydrogen. (c) helium. 8. Which one of these stars spends more time in protostar stage? (a) 1 solar mass star. (b) 10 solar mass star. 9. The stronger is the force of gravity on a clock, the faster it runs. (a) True. (b) False. 10. During ...
... 7. About one quarter of material in a nebula is (a) dust. (b) hydrogen. (c) helium. 8. Which one of these stars spends more time in protostar stage? (a) 1 solar mass star. (b) 10 solar mass star. 9. The stronger is the force of gravity on a clock, the faster it runs. (a) True. (b) False. 10. During ...
Stellar Evolution – Test Review Answers
... Nearly in the middle of both the temperature and luminosity scales relative to other stars. This puts it around the middle of the main sequence. 17. Where are giant stars, supergiant stars and white dwarfs found on the H-R diagram, relative to the main sequence? Giant and supergiant stars lie above ...
... Nearly in the middle of both the temperature and luminosity scales relative to other stars. This puts it around the middle of the main sequence. 17. Where are giant stars, supergiant stars and white dwarfs found on the H-R diagram, relative to the main sequence? Giant and supergiant stars lie above ...
The Hertzsprung-Russell Diagram
... their life cycles. The Main Sequence is set by hydrogen fusion. ...
... their life cycles. The Main Sequence is set by hydrogen fusion. ...
The light curves for a nova look like the following.
... The s-process works as long as the decay time for unstable isotopes is longer than the capture time. Up to the element bismuth (atomic number 83), the s-process works, but above this point the more massive nuclei that can be built from bismuth are unstable. 2) r-process (r means rapid) In this proce ...
... The s-process works as long as the decay time for unstable isotopes is longer than the capture time. Up to the element bismuth (atomic number 83), the s-process works, but above this point the more massive nuclei that can be built from bismuth are unstable. 2) r-process (r means rapid) In this proce ...
Document
... stay for a while, and eventually move through giant stages before becoming white dwarfs. • Higher mass stars move rapidly off the main sequence and into the giant stages, eventually exploding in a supernova. ...
... stay for a while, and eventually move through giant stages before becoming white dwarfs. • Higher mass stars move rapidly off the main sequence and into the giant stages, eventually exploding in a supernova. ...
Calculating Main Sequence Lifetimes
... If we remember that the Sun’s mass is 2 × 10 Kg, and knowing the stellar mass, we can calculate the period in which the star burns Hydrogen, which the time it stays as a main sequence star. The star turns off: the star exhausts the Hydrogen in its core and it continues to burn it in shells.. For a ‘ ...
... If we remember that the Sun’s mass is 2 × 10 Kg, and knowing the stellar mass, we can calculate the period in which the star burns Hydrogen, which the time it stays as a main sequence star. The star turns off: the star exhausts the Hydrogen in its core and it continues to burn it in shells.. For a ‘ ...
Characteristics of stars
... • Neutron stars are about 20KM (smallest) • Giant stars and super giant stars. If our sun were a super giant star it would fill our solar system as far out as Jupiter. ...
... • Neutron stars are about 20KM (smallest) • Giant stars and super giant stars. If our sun were a super giant star it would fill our solar system as far out as Jupiter. ...
Time From the Perspective of a Particle Physicist
... • Usually leaves neutron star For high mass stars • fusion continues beyond C,O to Iron • if Mass(core) > 1.4 M(Sun) core collapses in SUPERNOVA (II) • leaves either Neutron Star or Black Hole • Most SN are this type PHYS 162 ...
... • Usually leaves neutron star For high mass stars • fusion continues beyond C,O to Iron • if Mass(core) > 1.4 M(Sun) core collapses in SUPERNOVA (II) • leaves either Neutron Star or Black Hole • Most SN are this type PHYS 162 ...
stars and galaxies – study guide
... 26. White dwarf stars are hot, faint, Earth-sized stars. 27. A black hole is the densest object in the universe, and no light escapes. 28. The absolute magnitude is a measurement that compares the true brightness of stars. 29. What kind of spectrum comes from white light? Continuous 30. Some constel ...
... 26. White dwarf stars are hot, faint, Earth-sized stars. 27. A black hole is the densest object in the universe, and no light escapes. 28. The absolute magnitude is a measurement that compares the true brightness of stars. 29. What kind of spectrum comes from white light? Continuous 30. Some constel ...
Today`s Powerpoint
... B: luminosity vs temperature C: mass vs luminosity D: temperature vs diameter ...
... B: luminosity vs temperature C: mass vs luminosity D: temperature vs diameter ...
Stars and The Universe
... itself, its mass collides at its core and bounces back in an explosion called a ____________. As a result of this explosion, parts of the massive star fly away into space, where they can form _____________. If the mass remaining in the dead star’s core is 3 times our sun’s mass, it will form a _____ ...
... itself, its mass collides at its core and bounces back in an explosion called a ____________. As a result of this explosion, parts of the massive star fly away into space, where they can form _____________. If the mass remaining in the dead star’s core is 3 times our sun’s mass, it will form a _____ ...
Section 25.1 Properties of Stars
... contains the majority of stars and runs diagonally from the upper left to the lower right on the H–R diagram. ...
... contains the majority of stars and runs diagonally from the upper left to the lower right on the H–R diagram. ...
Name
... B) Neutrinos were released from the Sun at record lows in 1987 C) Gamma rays were released from the Sun at record lows in 1987 D) Sunspot activity virtually ceased between the years 1645 and 1715. E) The energy output from the Sun was at a minimum from the years 1843 through 1902 5) Stars like the S ...
... B) Neutrinos were released from the Sun at record lows in 1987 C) Gamma rays were released from the Sun at record lows in 1987 D) Sunspot activity virtually ceased between the years 1645 and 1715. E) The energy output from the Sun was at a minimum from the years 1843 through 1902 5) Stars like the S ...
Name
... B) Neutrinos were released from the Sun at record lows in 1987 C) Gamma rays were released from the Sun at record lows in 1987 D) Sunspot activity virtually ceased between the years 1645 and 1715. E) The energy output from the Sun was at a minimum from the years 1843 through 1902 26) Stars like the ...
... B) Neutrinos were released from the Sun at record lows in 1987 C) Gamma rays were released from the Sun at record lows in 1987 D) Sunspot activity virtually ceased between the years 1645 and 1715. E) The energy output from the Sun was at a minimum from the years 1843 through 1902 26) Stars like the ...
Name - MIT
... D) The mine was filled with a chlorine-containing liquid. When a Chlorine atom captures a neutrino, it becomes radioactive argon, which releases an electron which can be detected by a detector. E) The Gold in the mine tends to slow the neutrinos down and allows them to be detected by a neutrino dete ...
... D) The mine was filled with a chlorine-containing liquid. When a Chlorine atom captures a neutrino, it becomes radioactive argon, which releases an electron which can be detected by a detector. E) The Gold in the mine tends to slow the neutrinos down and allows them to be detected by a neutrino dete ...
Name - MIT
... B) The mine was filled with a chlorine-containing liquid. When a Chlorine atom captures a neutrino, it becomes radioactive argon, which releases an electron which can be detected by a detector. C) The mine contains water that undergoes fusion when neutrinos strike it. The ...
... B) The mine was filled with a chlorine-containing liquid. When a Chlorine atom captures a neutrino, it becomes radioactive argon, which releases an electron which can be detected by a detector. C) The mine contains water that undergoes fusion when neutrinos strike it. The ...
Slide 1 - Fort Bend ISD
... standard distance from the Earth • Scientists study globular clusters to compare brightness of stars • All about same distance from Earth ...
... standard distance from the Earth • Scientists study globular clusters to compare brightness of stars • All about same distance from Earth ...
A Star is Born – Worksheet and Key – Ben Kwok
... What causes them to form? Gravitational forces pulling dust particles and gas together How do stars created energy? Nuclear fusion How long does a main sequence star live for? 10 billion years What marks the start of the death of a star? When the star can no longer fuse hydrgen What does the term re ...
... What causes them to form? Gravitational forces pulling dust particles and gas together How do stars created energy? Nuclear fusion How long does a main sequence star live for? 10 billion years What marks the start of the death of a star? When the star can no longer fuse hydrgen What does the term re ...
100 X size of Sun - East Penn School District
... • In the magnitude scale, lower numbers are associated with brighter stars. • Star A has an apparent magnitude = 5.4 and star B has an apparent magnitude = 2.4. Which star is brighter? • We can't actually move stars around, but we can calculate how bright a star would be if placed at the agreed-upon ...
... • In the magnitude scale, lower numbers are associated with brighter stars. • Star A has an apparent magnitude = 5.4 and star B has an apparent magnitude = 2.4. Which star is brighter? • We can't actually move stars around, but we can calculate how bright a star would be if placed at the agreed-upon ...
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.