Tests and Constraints on Theories of Galaxy Formation and
... in the first 3% of the age of the universe be greater than or equal to the total number of baryons converted to stars in the remaining 97%. The metals produced by this conversion must be hidden in black holes. There must be no x-ray producing accretion onto the black holes. The NIRB must not interac ...
... in the first 3% of the age of the universe be greater than or equal to the total number of baryons converted to stars in the remaining 97%. The metals produced by this conversion must be hidden in black holes. There must be no x-ray producing accretion onto the black holes. The NIRB must not interac ...
Which has a hotter temperature, a red star or a blue star? How do
... Note that temperature and energy are not the same thing. Also remember that all blackbodies emit radiation at all wavelengths, regardless of temperature. The temperature just determines how much it radiates at each wavelength. Also, E = hν is the energy ofa single photon, and ε= σT 4 is the total en ...
... Note that temperature and energy are not the same thing. Also remember that all blackbodies emit radiation at all wavelengths, regardless of temperature. The temperature just determines how much it radiates at each wavelength. Also, E = hν is the energy ofa single photon, and ε= σT 4 is the total en ...
Massive Stars - University of Washington
... What Makes a Star a Star? Fusion More Likely A body that satisfies two conditions: (a) It is bound by self-gravity Hotter Core (b) It radiates energy supplied by and internal source An introduction to the theory of stellar structure and evolution by Dina Prialnik ...
... What Makes a Star a Star? Fusion More Likely A body that satisfies two conditions: (a) It is bound by self-gravity Hotter Core (b) It radiates energy supplied by and internal source An introduction to the theory of stellar structure and evolution by Dina Prialnik ...
Stellar Evolution
... and diameter. In fact, astronomers have discovered that the mass and the composition (makeup) of a star determine nearly all its other properties. ...
... and diameter. In fact, astronomers have discovered that the mass and the composition (makeup) of a star determine nearly all its other properties. ...
25drake3s
... The Drake Equation N=R* X fp X ne X fl X fi X fc X fL N = The number of civilizations in the galaxy R* = Number of stars in the galaxy fp = Fraction of stars with planets ne = Average number of suitable planets per star fl = Fraction of suitable planets on which life ...
... The Drake Equation N=R* X fp X ne X fl X fi X fc X fL N = The number of civilizations in the galaxy R* = Number of stars in the galaxy fp = Fraction of stars with planets ne = Average number of suitable planets per star fl = Fraction of suitable planets on which life ...
Stellar Evolution II
... Larger clouds of gas (GMCs) tend to fragment into smaller ones before collapsing to form stars – very massive stars are rare • Stars with masses above 50 MSUN are unstable – nuclear reactions in their core produce energy at such a fast rate that they blow off their outer layers, losing mass. ...
... Larger clouds of gas (GMCs) tend to fragment into smaller ones before collapsing to form stars – very massive stars are rare • Stars with masses above 50 MSUN are unstable – nuclear reactions in their core produce energy at such a fast rate that they blow off their outer layers, losing mass. ...
PPT file
... “there are more stars in the universe than grains of sand on all the beaches of Earth.” In between stars there is interstellar matter, which is made up of gas (mostly Hydrogen) and dust. Birth of a Star Gravity attracts chunks of gas and dust in a nebula to come ...
... “there are more stars in the universe than grains of sand on all the beaches of Earth.” In between stars there is interstellar matter, which is made up of gas (mostly Hydrogen) and dust. Birth of a Star Gravity attracts chunks of gas and dust in a nebula to come ...
Star Life Cycle Poster
... Star Life Cycle Poster You need to investigate the life cycle of stars and other objects in the universe. All work must be typed. You may work alone or with a partner and turn in one assignment. 1. Give a description or definition, in YOUR OWN WORDS, for the following terms. (1 pt. each) Black hole ...
... Star Life Cycle Poster You need to investigate the life cycle of stars and other objects in the universe. All work must be typed. You may work alone or with a partner and turn in one assignment. 1. Give a description or definition, in YOUR OWN WORDS, for the following terms. (1 pt. each) Black hole ...
proposed research projects for pparc gemini studentships
... Galaxy and cosmological evolution Galaxy Surveys Active galaxies and their nuclear environments Demographics of supermassive black holes in galaxy nuclei ...
... Galaxy and cosmological evolution Galaxy Surveys Active galaxies and their nuclear environments Demographics of supermassive black holes in galaxy nuclei ...
Life Cycle of a Star
... shrinks, it grows hotter and denser, and a new series of nuclear reactions begin to occur, temporarily halting the collapse of the core. ...
... shrinks, it grows hotter and denser, and a new series of nuclear reactions begin to occur, temporarily halting the collapse of the core. ...
Day 1212
... The outer layers expand and cool. In this late stage of its life cycle, an average star like our Sun is called a giant. ...
... The outer layers expand and cool. In this late stage of its life cycle, an average star like our Sun is called a giant. ...
Apparent magnitude
... Newly formed and young stars in the galactic plane in circular orbits (in one year ~1 M new stars) The metallicity of young stars increases Open star clusters, interstellar matter Also an “outer” disc of hydrogen (15 000 ly away) and a large disc of warm gas ( ~10 000K) High-velocity clouds (HVC), ...
... Newly formed and young stars in the galactic plane in circular orbits (in one year ~1 M new stars) The metallicity of young stars increases Open star clusters, interstellar matter Also an “outer” disc of hydrogen (15 000 ly away) and a large disc of warm gas ( ~10 000K) High-velocity clouds (HVC), ...
SES4U ~ The Formation of Our Solar Systemstudentcopy
... Low density---102cm-3. Compare this to the density of air, 2x1019 cm-3. The minimum mass is a few times the mass of the sun. ...
... Low density---102cm-3. Compare this to the density of air, 2x1019 cm-3. The minimum mass is a few times the mass of the sun. ...
Origins of the Universe (FIB)
... Formed from a _____________ (an enormous cloud of dust and gas) The ______ like all __________ was formed from a nebula 1. _________ causes the matter of the nebula to _________ and __________ 2. The contracting nebula begins to ___________ into a spinning pancake shape with a bulge at the cente ...
... Formed from a _____________ (an enormous cloud of dust and gas) The ______ like all __________ was formed from a nebula 1. _________ causes the matter of the nebula to _________ and __________ 2. The contracting nebula begins to ___________ into a spinning pancake shape with a bulge at the cente ...
Lecture 12: Age, Metalicity, and Observations Abundance
... • Main events in the evolution of the Universe: – The Big Bang (inflation of a bubble of false vacuum) – Symmetry breaking à matter/anti-matter ratio – Quark + antiquark annihilation à photon/baryon ratio – The quark soup à heavy quark decay – Quark-Hadron phase transition and neutron decay ...
... • Main events in the evolution of the Universe: – The Big Bang (inflation of a bubble of false vacuum) – Symmetry breaking à matter/anti-matter ratio – Quark + antiquark annihilation à photon/baryon ratio – The quark soup à heavy quark decay – Quark-Hadron phase transition and neutron decay ...
Stars
... Ball of hot gas (hydrogen and helium) that gives off light Have different colors, sizes, and patterns. ...
... Ball of hot gas (hydrogen and helium) that gives off light Have different colors, sizes, and patterns. ...
Organize Your Space PowerPoint.
... The belt is 180 million km in width and contains thousands of asteroids that are constantly in motion, crashing into each other at high speeds and sending clouds of dust into space. The combined mass of all the asteroids would only be 1/1000 the mass of the earth and if all the asteroids were combin ...
... The belt is 180 million km in width and contains thousands of asteroids that are constantly in motion, crashing into each other at high speeds and sending clouds of dust into space. The combined mass of all the asteroids would only be 1/1000 the mass of the earth and if all the asteroids were combin ...
STATE UNIVERSITY OF NEW YORK COLLEGE OF TECHNOLOGY CANTON, NEW YORK
... B. Motion of the fixed stars, constellations, and the Celestial Sphere C. Phases of the Moon D. Motion of the Sun and the planets defines the ecliptic and the Zodiac Historical perspective on the co-evolution of Astronomy and Physics A. Contributions by the ancient Greeks B. Heliocentric and G ...
... B. Motion of the fixed stars, constellations, and the Celestial Sphere C. Phases of the Moon D. Motion of the Sun and the planets defines the ecliptic and the Zodiac Historical perspective on the co-evolution of Astronomy and Physics A. Contributions by the ancient Greeks B. Heliocentric and G ...
Homework 5 – AS.171.627 – Zakamska
... particles), and the ship starts slowly leaking gas into surrounding vacuum. How many particles are lost through the crack per unit time? What is the escaping particles’ total kinetic energy (per unit time)? What is their average kinetic energy expressed in units of kT , where T is the instantaneous ...
... particles), and the ship starts slowly leaking gas into surrounding vacuum. How many particles are lost through the crack per unit time? What is the escaping particles’ total kinetic energy (per unit time)? What is their average kinetic energy expressed in units of kT , where T is the instantaneous ...
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.