The correct answers are written in bold, italic and underlined. The
... positioned higher and massive red giant stars positioned lower Very massive stars evolve very quickly and generate the most energy and therefore exist for only a short time. 3. If three stars of different mass are formed at the same time in a cluster, which one will last longest? • The small-mass st ...
... positioned higher and massive red giant stars positioned lower Very massive stars evolve very quickly and generate the most energy and therefore exist for only a short time. 3. If three stars of different mass are formed at the same time in a cluster, which one will last longest? • The small-mass st ...
celestial sphere
... PURPOSE: To compare the horizon and equatorial coordinate systems and to learn how to determine sidereal time. To make use of a celestial globe in understanding the basic coordinate systems. PROCEDURE: Making use of the celestial globe, answer the questions in this lab pertaining to the horizon and ...
... PURPOSE: To compare the horizon and equatorial coordinate systems and to learn how to determine sidereal time. To make use of a celestial globe in understanding the basic coordinate systems. PROCEDURE: Making use of the celestial globe, answer the questions in this lab pertaining to the horizon and ...
Gizmos: H-R Diagrams
... Gizmo Warm-up In the early 1900s, astronomers were able to identify many star characteristics such as color, size, temperature, and luminosity—or how bright a star is. However, astronomers did not yet understand exactly how these characteristics were related. Using the H-R Diagram Gizmo™, you will d ...
... Gizmo Warm-up In the early 1900s, astronomers were able to identify many star characteristics such as color, size, temperature, and luminosity—or how bright a star is. However, astronomers did not yet understand exactly how these characteristics were related. Using the H-R Diagram Gizmo™, you will d ...
Stellar Physics 2
... A. They are mostly made up of neutron degenerate matter, with an outer ‘crust’ of white-dwarf-like material. ...
... A. They are mostly made up of neutron degenerate matter, with an outer ‘crust’ of white-dwarf-like material. ...
MAIN SEQUENCE STARS, Red Giants and White Dwarfs
... • 16O + 4He 20Ne + • 20Ne + 4He 24Mg + • We’ll come back to this type of onion-layer model star when we talk about supernova explosions and neutron stars. • The elements cooked here are needed for life ...
... • 16O + 4He 20Ne + • 20Ne + 4He 24Mg + • We’ll come back to this type of onion-layer model star when we talk about supernova explosions and neutron stars. • The elements cooked here are needed for life ...
White Dwarfs
... 17. Why can't massive stars generate energy from iron fusion? a. The temperature at their centers never gets high enough. b. The density at their centers is too low. ...
... 17. Why can't massive stars generate energy from iron fusion? a. The temperature at their centers never gets high enough. b. The density at their centers is too low. ...
Time From the Perspective of a Particle Physicist
... usually cold (100O K or -300O F) usually almost perfect vacuum with 1 atom/cm3 (1 g water = 1023 atoms) Local concentrations: compressed by gravity and form stars. Called Giant Molecular Clouds as molecules have been observed. Need about 1,000,000 times the mass of the Sun in 100 LY volume to initia ...
... usually cold (100O K or -300O F) usually almost perfect vacuum with 1 atom/cm3 (1 g water = 1023 atoms) Local concentrations: compressed by gravity and form stars. Called Giant Molecular Clouds as molecules have been observed. Need about 1,000,000 times the mass of the Sun in 100 LY volume to initia ...
Letter to the Editor The formation of bipolar planetary nebulae
... and one might expect that this will have an effect on the formation of the nebula. A typical post-AGB track in the HR-diagram consists of two parts (Paczyński 1971). Initially the star contracts, evolving to higher effective temperatures at a constant luminosity; then as the energy production stops ...
... and one might expect that this will have an effect on the formation of the nebula. A typical post-AGB track in the HR-diagram consists of two parts (Paczyński 1971). Initially the star contracts, evolving to higher effective temperatures at a constant luminosity; then as the energy production stops ...
Magnitudes and Colours of Stars - Lincoln
... really interesting and exciting facts about stars and other distant objects. In spite of the fact that we are stuck on Earth, our instruments can measure the position of a star as the year passes, the brightness of a star, and the spectrum of light from a star. These allow us to calculate things tha ...
... really interesting and exciting facts about stars and other distant objects. In spite of the fact that we are stuck on Earth, our instruments can measure the position of a star as the year passes, the brightness of a star, and the spectrum of light from a star. These allow us to calculate things tha ...
Powerpoint Presentation (large file)
... Explosive thermonuclear processes on white dwarfs and neutron stars produce novae and bursters • Material from an ordinary star in a close binary can fall onto the surface of the companion white dwarf or neutron star to produce a surface layer in which thermonuclear reactions can explosively igni ...
... Explosive thermonuclear processes on white dwarfs and neutron stars produce novae and bursters • Material from an ordinary star in a close binary can fall onto the surface of the companion white dwarf or neutron star to produce a surface layer in which thermonuclear reactions can explosively igni ...
Ch. 17 (RGs & WDs)
... 17.1 The Solar Neighborhood Next nearest neighbor: Barnard’s Star (~6 ly away) Barnard’s Star has the largest proper motion of any – proper motion is the actual shift of the star in the sky, after correcting for parallax. These pictures were taken 22 years apart: ...
... 17.1 The Solar Neighborhood Next nearest neighbor: Barnard’s Star (~6 ly away) Barnard’s Star has the largest proper motion of any – proper motion is the actual shift of the star in the sky, after correcting for parallax. These pictures were taken 22 years apart: ...
The Formation of Stars and Solar Systems
... hydrogen atoms. • The atoms are so far apart that, if an atom were an average- size person, each person would be separated by about 465 million miles, which is the distance between our Sun and Jupiter. • These atoms are moving very fast because they are extremely hot, baked by ultraviolet radiation ...
... hydrogen atoms. • The atoms are so far apart that, if an atom were an average- size person, each person would be separated by about 465 million miles, which is the distance between our Sun and Jupiter. • These atoms are moving very fast because they are extremely hot, baked by ultraviolet radiation ...
Life as a Low
... clusters show star becomes larger, redder, and more luminous after its time on the main sequence is over. ...
... clusters show star becomes larger, redder, and more luminous after its time on the main sequence is over. ...
Test - Scioly.org
... D. Secondary Minimum E. Orbital Secondary 56. If the entire X-Axis (as strictly measured on the graph) spans 1.641 units, calculate the approximate period and frequency of the described binary system. A. Period: .876; Frequency: 1.14 B. Period: .853; Frequency: 1.17 C. Period: .821; Frequency: 1.21 ...
... D. Secondary Minimum E. Orbital Secondary 56. If the entire X-Axis (as strictly measured on the graph) spans 1.641 units, calculate the approximate period and frequency of the described binary system. A. Period: .876; Frequency: 1.14 B. Period: .853; Frequency: 1.17 C. Period: .821; Frequency: 1.21 ...
The HR Diagram - Faculty Web Pages
... squeeze the gas all down to a single point, and radiation pressure, which wants to blast all the gas out to infinity. These two opposite forces balance out in a process called Hydrostatic Equilibrium, and keep the gas at a stable, fairly constant size. The radiation itself is due to the fusion of pr ...
... squeeze the gas all down to a single point, and radiation pressure, which wants to blast all the gas out to infinity. These two opposite forces balance out in a process called Hydrostatic Equilibrium, and keep the gas at a stable, fairly constant size. The radiation itself is due to the fusion of pr ...
ph507lecnote06
... a blackbody increases as the fourth power of its temperature. If we approximate a star by a blackbody, the total energy output per unit time of the star (its power or luminosity in watts) is just L = 4R2T4 since the surface area of a sphere of radius R is 4R2 To summarise: A blackbody radiator ha ...
... a blackbody increases as the fourth power of its temperature. If we approximate a star by a blackbody, the total energy output per unit time of the star (its power or luminosity in watts) is just L = 4R2T4 since the surface area of a sphere of radius R is 4R2 To summarise: A blackbody radiator ha ...
Encyclopedia of Optical Engineering Stellar Evolution
... increases but the electron pressure does not change. However, the helium nuclei still behave as an ideal gas. For stars under 0.5 M , the temperature and pressure inside the degenerate electron core will never be great enough to begin the fusion of helium, and these stars will live for hundreds of ...
... increases but the electron pressure does not change. However, the helium nuclei still behave as an ideal gas. For stars under 0.5 M , the temperature and pressure inside the degenerate electron core will never be great enough to begin the fusion of helium, and these stars will live for hundreds of ...
Lecture 11
... horizon because nothing can go faster than light. • No escape means there is no more contact with something that falls in. It increases the hole mass, changes the spin or charge, but otherwise loses its identity. ...
... horizon because nothing can go faster than light. • No escape means there is no more contact with something that falls in. It increases the hole mass, changes the spin or charge, but otherwise loses its identity. ...
