ph607-15-test2ans
... Q1. a) T and P are the temperature and pressure at a radial distance r from the centre of the star, and is the ratio of specific heats under constant pressure and constant volume. [6 marks] (b)The criteria for convection to occur can be satisfied in two ways; either the ratio of specific heats is ...
... Q1. a) T and P are the temperature and pressure at a radial distance r from the centre of the star, and is the ratio of specific heats under constant pressure and constant volume. [6 marks] (b)The criteria for convection to occur can be satisfied in two ways; either the ratio of specific heats is ...
Comparing Earth, Sun and Jupiter
... luminosity of only 3% solar. How big is it? From the Stefan Boltzmann law: L 4R 2T 4 ...
... luminosity of only 3% solar. How big is it? From the Stefan Boltzmann law: L 4R 2T 4 ...
Document
... Must have a mass of 2.7£106M¯. Not a black hole from a single stellar collapse, but must be built up over time. We shall meet these again when we come to look at quasars, but we have to ask “Just how active was the young Milky Way”? ...
... Must have a mass of 2.7£106M¯. Not a black hole from a single stellar collapse, but must be built up over time. We shall meet these again when we come to look at quasars, but we have to ask “Just how active was the young Milky Way”? ...
Astronomy
... A contracting cloud is called a protostar. Pressure and temperature increase. When the contracting gas and dust becomes so hot that nuclear fusion begins, a star is born!! ...
... A contracting cloud is called a protostar. Pressure and temperature increase. When the contracting gas and dust becomes so hot that nuclear fusion begins, a star is born!! ...
Telephone Quizzes for ASTR 200 1999 Revision
... is the same as that of the Sun as mass does not affect the lifetime of a star. is shorter than that of the Sun since there is less fuel to burn. is longer than that of the Sun because the star generates energy (uses fuel) at a very slow rate. cannot be discussed as such a star is too small to genera ...
... is the same as that of the Sun as mass does not affect the lifetime of a star. is shorter than that of the Sun since there is less fuel to burn. is longer than that of the Sun because the star generates energy (uses fuel) at a very slow rate. cannot be discussed as such a star is too small to genera ...
Lecture 1 - University of Oxford Department of Physics
... • HI gas is less dense, average is 1 cm-3 with a range of 0.01cm-3 to 100 cm-3, temperature average is 100K with a range of 20–3000 K • Molecular gas is dense, average is 1000 cm-3, up to 107 cm-3 or higher • Temperature is low, 10–20 K in the disk, can be higher in high-mass star forming regions • ...
... • HI gas is less dense, average is 1 cm-3 with a range of 0.01cm-3 to 100 cm-3, temperature average is 100K with a range of 20–3000 K • Molecular gas is dense, average is 1000 cm-3, up to 107 cm-3 or higher • Temperature is low, 10–20 K in the disk, can be higher in high-mass star forming regions • ...
Lecture 1: Welcome to Astronomy 106
... and astronomers have just discovered the remnant in the X-ray image shown on the right. The explosion occurred close to the center of our Galaxy and the optical light was obscured from view. ...
... and astronomers have just discovered the remnant in the X-ray image shown on the right. The explosion occurred close to the center of our Galaxy and the optical light was obscured from view. ...
CHAPTER 32 1. What is happening inside a star that isn`t happening
... 18. A star somewhat larger than our Sun produces more heat as it contracts. This star will then fuse _____ into heavier elements. ...
... 18. A star somewhat larger than our Sun produces more heat as it contracts. This star will then fuse _____ into heavier elements. ...
I. Stars - SharpSchool
... “As space expands there are many more gaps forming and they need to be filled by stars and energy. So stars need to have a dynamic life cycle. Moments of birth and death, right? ” http://library.thinkquest.org/C0110277/stars/life_cycle1.htm ...
... “As space expands there are many more gaps forming and they need to be filled by stars and energy. So stars need to have a dynamic life cycle. Moments of birth and death, right? ” http://library.thinkquest.org/C0110277/stars/life_cycle1.htm ...
School of Physics Multiwavelength Observations of Evolved Stars Research project in Astrophysics
... Scientific Background / Current Research The project involves observation and theoretical modelling of stellar systems containing evolved giant stars with masses similar to that of our own Sun. Although supernovae are showy objects, stars with mass similar to our Sun are much more plentiful and when ...
... Scientific Background / Current Research The project involves observation and theoretical modelling of stellar systems containing evolved giant stars with masses similar to that of our own Sun. Although supernovae are showy objects, stars with mass similar to our Sun are much more plentiful and when ...
Stars and Nebula
... A. They are too cold. B. Gas and dust clouds never emit light. C. There is no nearby source of ultraviolet light. D. They do emit light but it is immediately absorbed by nearby gas and dust. ...
... A. They are too cold. B. Gas and dust clouds never emit light. C. There is no nearby source of ultraviolet light. D. They do emit light but it is immediately absorbed by nearby gas and dust. ...
Hertzsprung Russell diagram
... main sequence stars – the Sun is a main sequence star. In a way stars that lie on the main sequence are ‘normal’ stars while those that lie to one side or other of this area are ‘unusual’ stars – these stars such as white dwarfs, red giants and supergiants. Notice that supergiant stars can be either ...
... main sequence stars – the Sun is a main sequence star. In a way stars that lie on the main sequence are ‘normal’ stars while those that lie to one side or other of this area are ‘unusual’ stars – these stars such as white dwarfs, red giants and supergiants. Notice that supergiant stars can be either ...
WIMPs vs. MACHOS: What's the Matter?
... million stars This significantly exceeds the single event expected from “known” stars in the Galaxy ...
... million stars This significantly exceeds the single event expected from “known” stars in the Galaxy ...
word document - FacStaff Home Page for CBU
... can compare other stars. In Section B we consider the properties of stars in general. By considering these properties we can begin to determine how far away the stars are and how our sun fits into the general scheme. In Section C we study multiple star systems to see what additional information we c ...
... can compare other stars. In Section B we consider the properties of stars in general. By considering these properties we can begin to determine how far away the stars are and how our sun fits into the general scheme. In Section C we study multiple star systems to see what additional information we c ...
Stars - RSM Home
... our sun) they become red giants and then white dwarfs at the end of their life cycle. • Massive stars, however, generate much more energy and also don’t last as long. • Massive stars may explode with such intensity that they may become supernovas, neutron stars, pulsars, or black holes. • What will ...
... our sun) they become red giants and then white dwarfs at the end of their life cycle. • Massive stars, however, generate much more energy and also don’t last as long. • Massive stars may explode with such intensity that they may become supernovas, neutron stars, pulsars, or black holes. • What will ...
Planet Formation Gas Giants
... The Inner Planets • Within 5 AU dust grains grow to ~1 m in ~1000 years and accrete into vast numbers of “planetesimals”. • The biggest planetesimals undergo “runaway growth” to form the terrestrial planet cores. Their exact chemical composition depends on their distance from the Sun. ...
... The Inner Planets • Within 5 AU dust grains grow to ~1 m in ~1000 years and accrete into vast numbers of “planetesimals”. • The biggest planetesimals undergo “runaway growth” to form the terrestrial planet cores. Their exact chemical composition depends on their distance from the Sun. ...
Galactic Structure
... Stars in satellite galaxies have different elemental ratios than do field halo stars… Milky Way field stars ...
... Stars in satellite galaxies have different elemental ratios than do field halo stars… Milky Way field stars ...
Old Final
... A) the closer you are to a black hole the slower time passes for you to an outside observer B) light can not escape them C) because of their immense density they can always suck in anything D) light is redshifted while leaving the potential well E) we have no knowledge of what happens beyond the Sch ...
... A) the closer you are to a black hole the slower time passes for you to an outside observer B) light can not escape them C) because of their immense density they can always suck in anything D) light is redshifted while leaving the potential well E) we have no knowledge of what happens beyond the Sch ...
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.