Problem 4 : a. (20 points)
... stellar density. This would be like having several suns within the size of our solar system, which is much larger than we see anywhere else in the galaxy. Instead, we believe the center of our galaxy is occupied by a giant black hole. ...
... stellar density. This would be like having several suns within the size of our solar system, which is much larger than we see anywhere else in the galaxy. Instead, we believe the center of our galaxy is occupied by a giant black hole. ...
of the star. - Colyton High School
... 3. Fusion stops, temperature drops and gas pressure decreases, no longer in equilibrium. 4. Core contracts (gravity WINS by pulling atoms in). 5. Increased temperature (more atoms, more collisions) and gas pressure in the core reinitiates nuclear fusion, equilibrium is achieved, and the cycle begins ...
... 3. Fusion stops, temperature drops and gas pressure decreases, no longer in equilibrium. 4. Core contracts (gravity WINS by pulling atoms in). 5. Increased temperature (more atoms, more collisions) and gas pressure in the core reinitiates nuclear fusion, equilibrium is achieved, and the cycle begins ...
Supernova
... – Large energy release (103 – 106 L) – Short time period (few days) • These explosions used to be classified as novas or supernovas. – Based on absolute magnitude • They are now all called supernovas. ...
... – Large energy release (103 – 106 L) – Short time period (few days) • These explosions used to be classified as novas or supernovas. – Based on absolute magnitude • They are now all called supernovas. ...
PowerPoint - Chandra X
... occurred when the core of a massive star collapsed to form a neutron star or black hole (core-collapse supernova). The estimated age of the remnant is 3,000 years. Most of the oxygen in the universe is thought to be dispersed into space by core-collapse supernovas. The oxygen ejecta from such supern ...
... occurred when the core of a massive star collapsed to form a neutron star or black hole (core-collapse supernova). The estimated age of the remnant is 3,000 years. Most of the oxygen in the universe is thought to be dispersed into space by core-collapse supernovas. The oxygen ejecta from such supern ...
Lecture13 - University of Waterloo
... reddest (coolest) stars may have been formed shortly after the Big Bang, and would still be around. • The stars lying off the main sequence are not explained by the hydrogen-burning model: something else must be going on… ...
... reddest (coolest) stars may have been formed shortly after the Big Bang, and would still be around. • The stars lying off the main sequence are not explained by the hydrogen-burning model: something else must be going on… ...
answers
... 2) The Sun has a mass of 2 x 1030 kg and the other stars have masses ranging from 1/10th of this to over 200 times more. How do we know the mass of the other stars? This is done by measuring the period and radii of the ___________ orbiting them. A) moons B) planets C) stars Explain: C) Not Moons. Th ...
... 2) The Sun has a mass of 2 x 1030 kg and the other stars have masses ranging from 1/10th of this to over 200 times more. How do we know the mass of the other stars? This is done by measuring the period and radii of the ___________ orbiting them. A) moons B) planets C) stars Explain: C) Not Moons. Th ...
Study Guide – Midterm 3
... Gravity = “curvature” in space. • Photons, planets etc follow shortest paths through curved space. • Analogy: 2D bug on surface that curves into an extra (3rd) ...
... Gravity = “curvature” in space. • Photons, planets etc follow shortest paths through curved space. • Analogy: 2D bug on surface that curves into an extra (3rd) ...
Binary Star Par 1802 Word Document
... An unusual binary star system in the Orion nebula (Translated from Sterne und Weltraum 12/08 by G S Kelly) For many years astronomers have assumed that the stars in binary or multiple systems form at the same time. Now, however, a research team headed by Keivan Stassun at the Vanderbilt University i ...
... An unusual binary star system in the Orion nebula (Translated from Sterne und Weltraum 12/08 by G S Kelly) For many years astronomers have assumed that the stars in binary or multiple systems form at the same time. Now, however, a research team headed by Keivan Stassun at the Vanderbilt University i ...
Document
... for the Big Bang is the observed 3 K cosmic background radiation, which is believed to be the remnant of the primordial reball through which the universe made its appearance. In about a million years after the Big Bang, the temperature of this reball decreased from unbelievably high values of more ...
... for the Big Bang is the observed 3 K cosmic background radiation, which is believed to be the remnant of the primordial reball through which the universe made its appearance. In about a million years after the Big Bang, the temperature of this reball decreased from unbelievably high values of more ...
The Evening Sky in February 2016
... distant star; 13 000 times brighter than the sun and 300 light years away. The Milky Way is brightest in the southeast toward Crux. It can be traced up the sky, fading where it is nearly overhead. It becomes very faint east or right of Orion. The Milky Way is our edgewise view of the galaxy, the pan ...
... distant star; 13 000 times brighter than the sun and 300 light years away. The Milky Way is brightest in the southeast toward Crux. It can be traced up the sky, fading where it is nearly overhead. It becomes very faint east or right of Orion. The Milky Way is our edgewise view of the galaxy, the pan ...
大爆炸---宇宙的起源 - 中正大學化學系
... hydrogen to fuse, the core of the star begins to collapse until the central temperature rises to ~100×106 K. At this point helium nuclei are fusing together at a rate high enough to rival the rate at which their product, beryllium-8, decays back into two helium nuclei. This means that there are alwa ...
... hydrogen to fuse, the core of the star begins to collapse until the central temperature rises to ~100×106 K. At this point helium nuclei are fusing together at a rate high enough to rival the rate at which their product, beryllium-8, decays back into two helium nuclei. This means that there are alwa ...
スライド 1 - Astrophyics Lab. in Kagoshima University
... What is currently hot topics in (radio) astronomy? • New type of radio sources (e.g. fast radio bursts) • Newly found phase of star formation and stellar evolution • Newly discovered gas dynamics • New characteristics of a black hole, a high-envergy object, and interstellar medium • Innovative resea ...
... What is currently hot topics in (radio) astronomy? • New type of radio sources (e.g. fast radio bursts) • Newly found phase of star formation and stellar evolution • Newly discovered gas dynamics • New characteristics of a black hole, a high-envergy object, and interstellar medium • Innovative resea ...
Stellar Classification and Evolution What is a star? A cloud of gas
... Brown Dwarfs are _____________________________, but they do give off small amounts of ___________ as they cool ...
... Brown Dwarfs are _____________________________, but they do give off small amounts of ___________ as they cool ...
here.
... - 12Gyr old and no longer forming in the Milky Way Galaxy - Not possible to study their formation ...
... - 12Gyr old and no longer forming in the Milky Way Galaxy - Not possible to study their formation ...
Document
... 27.2 The old age of Sun-like stars As our sun grows old, its core begins to run out of hydrogen fuel. Gravity then causes the core to contract, raising the temperature. The hotter core pushes the outer layers of the star away, then star expands into a red giant. ...
... 27.2 The old age of Sun-like stars As our sun grows old, its core begins to run out of hydrogen fuel. Gravity then causes the core to contract, raising the temperature. The hotter core pushes the outer layers of the star away, then star expands into a red giant. ...
How do stars form as a function of stellar mass
... Abstract: How do stars form as a function of stellar mass? What are the effects of the immediate circumstellar environment? These are 2 fundamental questions that our study of companions to intermediate-mass pre-main sequence stars seeks to address. Herbig Ae/Be stars span the mass range from roughl ...
... Abstract: How do stars form as a function of stellar mass? What are the effects of the immediate circumstellar environment? These are 2 fundamental questions that our study of companions to intermediate-mass pre-main sequence stars seeks to address. Herbig Ae/Be stars span the mass range from roughl ...
Stars and Galaxies Section 1 Stars
... 1. Astronomers measure a star’s parallax—shift in its position when viewed from two different angles 2. Distance is measured in light-years—the distance light travels in a year D. Star properties 1. Color indicates temperature a. Hot stars are blue-white b. Cool stars look orange or red c. Yellow st ...
... 1. Astronomers measure a star’s parallax—shift in its position when viewed from two different angles 2. Distance is measured in light-years—the distance light travels in a year D. Star properties 1. Color indicates temperature a. Hot stars are blue-white b. Cool stars look orange or red c. Yellow st ...
NOVAE and SUPERNOVAE
... WD. More violent (and luminous) novae occur less frequently. Novae can ONLY occur in close binary star systems, where the possibility for mass transfer exists. Single white dwarfs do not become novae; they slowly cool over billions of years, becoming a dead stellar “ember”. During a nova, some o ...
... WD. More violent (and luminous) novae occur less frequently. Novae can ONLY occur in close binary star systems, where the possibility for mass transfer exists. Single white dwarfs do not become novae; they slowly cool over billions of years, becoming a dead stellar “ember”. During a nova, some o ...
The Hertzsprung-Russell Diagram
... place as a star evolves. Most stars are on the Main Sequence because that is where stars spend most of their lives, burning hydrogen to helium through nuclear reactions. As stars live out their lives, changes in the structure of the star are reflected in changes in stars temperatures, sizes and lumi ...
... place as a star evolves. Most stars are on the Main Sequence because that is where stars spend most of their lives, burning hydrogen to helium through nuclear reactions. As stars live out their lives, changes in the structure of the star are reflected in changes in stars temperatures, sizes and lumi ...
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. ...
Astronomy
... form in massive and dense clouds of molecular hydrogen—giant molecular clouds (GMC). They are gravitationally unstable, and matter coalesces to smaller denser clumps within, which then proceed to collapse and form stars. Star formation is a complex process, which always produces a gaseous protopla ...
... form in massive and dense clouds of molecular hydrogen—giant molecular clouds (GMC). They are gravitationally unstable, and matter coalesces to smaller denser clumps within, which then proceed to collapse and form stars. Star formation is a complex process, which always produces a gaseous protopla ...
Main-sequence stars - Stellar Populations
... connect some of those ideas together By Marc Rafelski Parts of this are © 2006 Pearson Education Inc, publishing as Addison-Wesley ...
... connect some of those ideas together By Marc Rafelski Parts of this are © 2006 Pearson Education Inc, publishing as Addison-Wesley ...
Star Questions 2008 - Fort Thomas Independent Schools
... Why a star remains roughly the same diameter when on the main sequence. Explain the following relationships: a. Surface temperature and color b. luminosity and mass c. absolute and apparent brightness What is the H-R Diagram? Describe the death of these two stars, one with 2 solar masses and one wit ...
... Why a star remains roughly the same diameter when on the main sequence. Explain the following relationships: a. Surface temperature and color b. luminosity and mass c. absolute and apparent brightness What is the H-R Diagram? Describe the death of these two stars, one with 2 solar masses and one wit ...
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.