PPT
... stars So what? It shows stars of different ages and in different stages, all at the same time. It is a great tool to check your understanding of the star life cycle. ...
... stars So what? It shows stars of different ages and in different stages, all at the same time. It is a great tool to check your understanding of the star life cycle. ...
Linking Asteroids and Meteorites through Reflectance Spectroscopy
... • She proposed that most stars were made up of Hydrogen and Helium • Her 1925 PhD Harvard thesis on these topics was voted best Astronomy thesis of the 20th century ...
... • She proposed that most stars were made up of Hydrogen and Helium • Her 1925 PhD Harvard thesis on these topics was voted best Astronomy thesis of the 20th century ...
Compare the following sets of stars using the words: BRIGHTER or
... 19. Where are we located in the Milkyway galaxy? We are on an arm. 20. Draw a picture and describe the process of H atoms combining to form He atoms. In the process of nuclear fusion, one atom of hydrogen (mass # = 2) and one atom of hydrogen (mass # = 3) fuse together to form Helium (mass # = 4) an ...
... 19. Where are we located in the Milkyway galaxy? We are on an arm. 20. Draw a picture and describe the process of H atoms combining to form He atoms. In the process of nuclear fusion, one atom of hydrogen (mass # = 2) and one atom of hydrogen (mass # = 3) fuse together to form Helium (mass # = 4) an ...
STARS- hot glowing sphere of gas that produces energy by
... STAR- hot glowing sphere of gas that produces energy by fusion 1] Light year—distance light travels in a year (9.5 trillion km, 6 trillion miles) 2] Star brightness A) Actual brightness- brightness right next to a star B) Apparent brightness—brightness as seen from earth 3] Formation of stars A) Neb ...
... STAR- hot glowing sphere of gas that produces energy by fusion 1] Light year—distance light travels in a year (9.5 trillion km, 6 trillion miles) 2] Star brightness A) Actual brightness- brightness right next to a star B) Apparent brightness—brightness as seen from earth 3] Formation of stars A) Neb ...
How do stars form?
... How do we know the timing? • Age of Sun via chemical composition and known rate of fusion: about 5 Ga ...
... How do we know the timing? • Age of Sun via chemical composition and known rate of fusion: about 5 Ga ...
THE HR DIAGRAM
... causes the star to expand to a greater radius than that of the main sequence star. During the expansion the star cools considerably. A low mass star that was a yellow or orange main sequence star evolves to a red giant during this expansion period. It is red because it is cool, and it is a giant bec ...
... causes the star to expand to a greater radius than that of the main sequence star. During the expansion the star cools considerably. A low mass star that was a yellow or orange main sequence star evolves to a red giant during this expansion period. It is red because it is cool, and it is a giant bec ...
Review 2
... Structure of a comet. The asteroid belt and the Oort cloud. Why do we have meteor showers during specific days of a year? Chapter 16: How do we use the atomic emission and absorption spectra to find the composition of a star? How do we determine the rotation period of a star? How do we determine the ...
... Structure of a comet. The asteroid belt and the Oort cloud. Why do we have meteor showers during specific days of a year? Chapter 16: How do we use the atomic emission and absorption spectra to find the composition of a star? How do we determine the rotation period of a star? How do we determine the ...
The Hertzsprung-Russell Diagram
... sequence star. Hint: plot both stars on an HR diagram and note how their temperatures and luminosities compare. ...
... sequence star. Hint: plot both stars on an HR diagram and note how their temperatures and luminosities compare. ...
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 ...
Integrative Studies 410 Our Place in the Universe
... • may contain millions of stars • Old stars • Great tool to study stellar life cycle ...
... • may contain millions of stars • Old stars • Great tool to study stellar life cycle ...
Place the stars in the proper sequence, following the
... Along the main sequence, stars of greater magnitude are hotter (have more energy) c. How is a star’s luminosity related to its energy? For main-sequence stars, the luminosity increases with temperature. For the giants and super-giants, large (high magnitude) and luminous stars are actually quite coo ...
... Along the main sequence, stars of greater magnitude are hotter (have more energy) c. How is a star’s luminosity related to its energy? For main-sequence stars, the luminosity increases with temperature. For the giants and super-giants, large (high magnitude) and luminous stars are actually quite coo ...
Can We Make A Star?
... • They are made of cosmic dust, mostly hydrogen and helium • They are very unstable • The are very violent • They give off an extremely large amount of energy ...
... • They are made of cosmic dust, mostly hydrogen and helium • They are very unstable • The are very violent • They give off an extremely large amount of energy ...
H-R Diagram Student
... H-R Diagram The Hertzsprung-Russell diagram is actually a graph that illustrates the relationship that exists between the average surface temperature of stars and their______________ ______________, which is how bright stars appear to be if they were all the same distance away. Rather than speak of ...
... H-R Diagram The Hertzsprung-Russell diagram is actually a graph that illustrates the relationship that exists between the average surface temperature of stars and their______________ ______________, which is how bright stars appear to be if they were all the same distance away. Rather than speak of ...
SES4U Life Cycle of a Star
... Stars will spend the majority of their lives fusing H into He When H fuel is gone, He is fused into C Massive stars are able to fuse C into heavier elements Stars slowly contract as they release energy during their life, yet their internal temperatures, densities and pressures continue to increase i ...
... Stars will spend the majority of their lives fusing H into He When H fuel is gone, He is fused into C Massive stars are able to fuse C into heavier elements Stars slowly contract as they release energy during their life, yet their internal temperatures, densities and pressures continue to increase i ...
3. Stellar Formation and Evolution
... • These newly born stars emit jets of gas along their axis of rotation, which may reduce the angular momentum of the collapsing star and result in small patches of nebulosity known as Herbig-Haro objects. • These jets, in combination with radiation from nearby massive stars, may help to drive away t ...
... • These newly born stars emit jets of gas along their axis of rotation, which may reduce the angular momentum of the collapsing star and result in small patches of nebulosity known as Herbig-Haro objects. • These jets, in combination with radiation from nearby massive stars, may help to drive away t ...
Mr - White Plains Public Schools
... Sun will eventually (1) explode in a supernova (2) become a black hole (3) change to a white dwarf (4) become a neutron star 2. Stars like Earth’s Sun most likely formed directly from a (1) nebula (2) supernova (3) red giant (4) black dwarf 3. According to the diagram, the life-cycle path followed b ...
... Sun will eventually (1) explode in a supernova (2) become a black hole (3) change to a white dwarf (4) become a neutron star 2. Stars like Earth’s Sun most likely formed directly from a (1) nebula (2) supernova (3) red giant (4) black dwarf 3. According to the diagram, the life-cycle path followed b ...
Stars and Galaxies - Earth Science: Astronomy
... Section 4 Galaxies and the Universe A. Galaxy—gravity holds together a large collection of stars, gas, and dust 1. Earth’s galaxy is Milky Way which is part of a galaxy cluster named the Local Group 2. Spiral galaxies—spiral arms wind out from inner section; some have barred spirals with stars and ...
... Section 4 Galaxies and the Universe A. Galaxy—gravity holds together a large collection of stars, gas, and dust 1. Earth’s galaxy is Milky Way which is part of a galaxy cluster named the Local Group 2. Spiral galaxies—spiral arms wind out from inner section; some have barred spirals with stars and ...
Useful Things to Study (#2)
... What’s the minimum temperature to run the proton-proton cycle in a star’s core? Why are Cepheids and RR Lyrae stars important? What is the period-luminosity relation? How does the life of a 10 solar mass star differ from the Sun’s life? What is degenerate electron matter? What is the maximum mass of ...
... What’s the minimum temperature to run the proton-proton cycle in a star’s core? Why are Cepheids and RR Lyrae stars important? What is the period-luminosity relation? How does the life of a 10 solar mass star differ from the Sun’s life? What is degenerate electron matter? What is the maximum mass of ...
Life Cycle of a Star Notes
... Stars glow because of a nuclear fusion reaction whereby hydrogen fuses together to form heavier elements such as helium and release energy. If enough matter is left behind, this may be so dense, and its gravitational field so strong that nothing can escape from it, not even light or other forms of e ...
... Stars glow because of a nuclear fusion reaction whereby hydrogen fuses together to form heavier elements such as helium and release energy. If enough matter is left behind, this may be so dense, and its gravitational field so strong that nothing can escape from it, not even light or other forms of e ...
Star
A star is a luminous sphere of plasma held together by its own gravity. The nearest star to Earth is the Sun. Other stars are visible from Earth during the night, appearing as a multitude of fixed luminous points in the sky due to their immense distance from Earth. Historically, the most prominent stars were grouped into constellations and asterisms, and the brightest stars gained proper names. Extensive catalogues of stars have been assembled by astronomers, which provide standardized star designations.For at least a portion of its life, a star shines due to thermonuclear fusion of hydrogen into helium in its core, releasing energy that traverses the star's interior and then radiates into outer space. Once the hydrogen in the core of a star is nearly exhausted, almost all naturally occurring elements heavier than helium are created by stellar nucleosynthesis during the star's lifetime and, for some stars, by supernova nucleosynthesis when it explodes. Near the end of its life, a star can also contain degenerate matter. Astronomers can determine the mass, age, metallicity (chemical composition), and many other properties of a star by observing its motion through space, luminosity, and spectrum respectively. The total mass of a star is the principal determinant of its evolution and eventual fate. Other characteristics of a star, including diameter and temperature, change over its life, while the star's environment affects its rotation and movement. A plot of the temperature of many stars against their luminosities, known as a Hertzsprung–Russell diagram (H–R diagram), allows the age and evolutionary state of a star to be determined.A star's life begins with the gravitational collapse of a gaseous nebula of material composed primarily of hydrogen, along with helium and trace amounts of heavier elements. Once the stellar core is sufficiently dense, hydrogen becomes steadily converted into helium through nuclear fusion, releasing energy in the process. The remainder of the star's interior carries energy away from the core through a combination of radiative and convective processes. The star's internal pressure prevents it from collapsing further under its own gravity. Once the hydrogen fuel at the core is exhausted, a star with at least 0.4 times the mass of the Sun expands to become a red giant, in some cases fusing heavier elements at the core or in shells around the core. The star then evolves into a degenerate form, recycling a portion of its matter into the interstellar environment, where it will contribute to the formation of a new generation of stars with a higher proportion of heavy elements. Meanwhile, the core becomes a stellar remnant: a white dwarf, a neutron star, or (if it is sufficiently massive) a black hole.Binary and multi-star systems consist of two or more stars that are gravitationally bound, and generally move around each other in stable orbits. When two such stars have a relatively close orbit, their gravitational interaction can have a significant impact on their evolution. Stars can form part of a much larger gravitationally bound structure, such as a star cluster or a galaxy.