Outline 8: History of the Universe and Solar System
... Total time is 5 hours. Total distance is 380 miles. If you were observed traveling at 60 mph and had covered 380 miles, the assumption would be made that you had traveled for 6 hours and 20 minutes (380miles/60mph) rather than 5 hours. ...
... Total time is 5 hours. Total distance is 380 miles. If you were observed traveling at 60 mph and had covered 380 miles, the assumption would be made that you had traveled for 6 hours and 20 minutes (380miles/60mph) rather than 5 hours. ...
star life cycle
... Elements are only made by a series of nuclear fusion events in a star, they spread across the Universe after supernova explosions . So all the atoms in you have been through a supernova explosion! ...
... Elements are only made by a series of nuclear fusion events in a star, they spread across the Universe after supernova explosions . So all the atoms in you have been through a supernova explosion! ...
August 29 - Astronomy
... Light, which is an electromagnetic wave, gets stretched as it travels though the expanding space to reach us from far away galaxies. Because red light has longer wavelengths than blue light, we say the light from these galaxies is redshifted, meaning shifted to longer ...
... Light, which is an electromagnetic wave, gets stretched as it travels though the expanding space to reach us from far away galaxies. Because red light has longer wavelengths than blue light, we say the light from these galaxies is redshifted, meaning shifted to longer ...
Where do elements come from?
... • Lighter elements fuse to create heavier elements like carbon and oxygen • During the life span of a star, fusion can take place up to the formation of Iron (Fe) ...
... • Lighter elements fuse to create heavier elements like carbon and oxygen • During the life span of a star, fusion can take place up to the formation of Iron (Fe) ...
2.1c Notes - Vanderbilt University
... This process is of the utmost importance: it explains that a large fraction of protons will be turned into neutrons leading to the formation of a “neutron star”, and in addition lots of highenergy neutrinos will be produced. The “neutrino wind” drives the supernova explosion of the star. Apart from ...
... This process is of the utmost importance: it explains that a large fraction of protons will be turned into neutrons leading to the formation of a “neutron star”, and in addition lots of highenergy neutrinos will be produced. The “neutrino wind” drives the supernova explosion of the star. Apart from ...
Supernovae and supernova remnants
... A supernova explosion is among the most dramatic events that can be seen. The term ‘supernova’ is somewhat misleading, as such an event represents not a new star (that is, a ‘nova’), but instead the end of a star’s life. Nuclear fusion, the energy source of the stars, creates heavier elements from l ...
... A supernova explosion is among the most dramatic events that can be seen. The term ‘supernova’ is somewhat misleading, as such an event represents not a new star (that is, a ‘nova’), but instead the end of a star’s life. Nuclear fusion, the energy source of the stars, creates heavier elements from l ...
Small images
... < about 1 solar mass which may be a main sequence star. Population II. Found in Galactic center, globular clusters, in and above disk. Roughly 300 estimated to exist. • Luminosities in X-rays for both are ~ 1036 – 1038 erg s-1. Spectra are approximately black bodies. ...
... < about 1 solar mass which may be a main sequence star. Population II. Found in Galactic center, globular clusters, in and above disk. Roughly 300 estimated to exist. • Luminosities in X-rays for both are ~ 1036 – 1038 erg s-1. Spectra are approximately black bodies. ...
Quiz Chapter 10 Answers
... Quiz Chapter 10 Answers 10-1. Protostars are not seen in visible light telescopes because: a) they don’t emit any radiation b) they are surrounded by clouds of gas and dust X c) they only emit infrared radiation d) they are all moving away from Earth so fast that their visible light is Doppler shift ...
... Quiz Chapter 10 Answers 10-1. Protostars are not seen in visible light telescopes because: a) they don’t emit any radiation b) they are surrounded by clouds of gas and dust X c) they only emit infrared radiation d) they are all moving away from Earth so fast that their visible light is Doppler shift ...
Stellar Evolution Test Answers
... 21. The most common type star in the universe is the a) brown dwarf b) white dwarf c) yellow dwarf d) red dwarf 22. A star hotter than the sun would tend to be more _________in color. a) yellow b) red c) blue 23. That which drives the life history of a star is its mass. a) true b) false 24. More mas ...
... 21. The most common type star in the universe is the a) brown dwarf b) white dwarf c) yellow dwarf d) red dwarf 22. A star hotter than the sun would tend to be more _________in color. a) yellow b) red c) blue 23. That which drives the life history of a star is its mass. a) true b) false 24. More mas ...
ppt - 2006 Mitchell Symposium
... Rotation and strong magnetic fields are intrinsic to the process. True for either neutron stars or black holes, SN or GRB. The proto-neutron star will respond non-monotonically to the iron core rotation rate. Non-axisymmetric rotational instabilities will generate significant MHD luminosity, sup ...
... Rotation and strong magnetic fields are intrinsic to the process. True for either neutron stars or black holes, SN or GRB. The proto-neutron star will respond non-monotonically to the iron core rotation rate. Non-axisymmetric rotational instabilities will generate significant MHD luminosity, sup ...
Stars
... Supernova 1987A Supernova have been important historically. Tycho and Kepler both observed supernova. The only supernova in modern time, visible to the naked eye, was detected on Feb. 23, 1987 and is known as SN1987A. A tremendous amount of energy is released in a supernova. SN1987A emitted more th ...
... Supernova 1987A Supernova have been important historically. Tycho and Kepler both observed supernova. The only supernova in modern time, visible to the naked eye, was detected on Feb. 23, 1987 and is known as SN1987A. A tremendous amount of energy is released in a supernova. SN1987A emitted more th ...
Life Cycle of Stars
... • Under collapse, protons and electrons combine to form neutrons. • 10 Km across Black Hole (If mass of core > 5 x Solar) • Not even compacted neutrons can support weight of very massive stars. ...
... • Under collapse, protons and electrons combine to form neutrons. • 10 Km across Black Hole (If mass of core > 5 x Solar) • Not even compacted neutrons can support weight of very massive stars. ...
Click here - Noadswood Science
... • Fusion only occurs in a stars core, no Hydrogen is converted to Helium in the outer layer • The more massive the star, the faster the process of fusion works (higher temperature and pressure in the core); • In generating heat via fusion, the mass of the star stays roughly the same (unlike a fire w ...
... • Fusion only occurs in a stars core, no Hydrogen is converted to Helium in the outer layer • The more massive the star, the faster the process of fusion works (higher temperature and pressure in the core); • In generating heat via fusion, the mass of the star stays roughly the same (unlike a fire w ...
ASTR2050 Spring 2005 • In this class we will cover: Brief review
... Different behavior for “high mass” stars (M > 10M!) Helium can burn before becoming degenerate Core continues to shrink, gets hotter, and burns heavier and heavier elements. Eventually iron (Fe) reached and it can burn no more... ...
... Different behavior for “high mass” stars (M > 10M!) Helium can burn before becoming degenerate Core continues to shrink, gets hotter, and burns heavier and heavier elements. Eventually iron (Fe) reached and it can burn no more... ...
Lecture 31 - 2 The Death of Stars: Stellar Recycling Phase 3 -
... to these radii are completely vaporized while planets further out are vaporized except for rocky cores. • despite higher luminosity, the much larger surface area actually results in a decreased surface temperature for the giant star (i.e. it becomes redder than it was when it was on the main sequenc ...
... to these radii are completely vaporized while planets further out are vaporized except for rocky cores. • despite higher luminosity, the much larger surface area actually results in a decreased surface temperature for the giant star (i.e. it becomes redder than it was when it was on the main sequenc ...
Chapter 21 Notes
... When enough material has accreted, fusion can reignite very suddenly, burning off the new material. Material keeps being transferred to the white dwarf, and the process repeats, as illustrated here: ...
... When enough material has accreted, fusion can reignite very suddenly, burning off the new material. Material keeps being transferred to the white dwarf, and the process repeats, as illustrated here: ...
Iron in Stars
... Instead, they do not have any more fusion at their core beyond carbon and oxygen. Their outer layers are lost and the core is left naked in space. In type 1a supernova, the white dwarf gains matter from a companion star which allows it to exceed the Chandrasekhar limit. Here iron is produced, but th ...
... Instead, they do not have any more fusion at their core beyond carbon and oxygen. Their outer layers are lost and the core is left naked in space. In type 1a supernova, the white dwarf gains matter from a companion star which allows it to exceed the Chandrasekhar limit. Here iron is produced, but th ...
Lecture 11
... that we observe a supernova that appears to be 5 x 10-15 watts. How far away is it? Express your answer in meters and in ...
... that we observe a supernova that appears to be 5 x 10-15 watts. How far away is it? Express your answer in meters and in ...
Chapter 13
... 20. Why do old supernova remnants emit X-rays? a. Electrons accelerated by magnetic fields produce synchrotron radiation. b. The expanding hot gas collides with the interstellar medium. c. Short-lived unstable isotopes of nickel and cobalt emit Xrays. d. The remnant gas is excited by the neutrino bu ...
... 20. Why do old supernova remnants emit X-rays? a. Electrons accelerated by magnetic fields produce synchrotron radiation. b. The expanding hot gas collides with the interstellar medium. c. Short-lived unstable isotopes of nickel and cobalt emit Xrays. d. The remnant gas is excited by the neutrino bu ...
Life Cycle of Stars
... the atoms are packed together even tighter than before. The outer shell has expanded in an effort to help heat from the core escape into space. The red giant is the first step in old age. ...
... the atoms are packed together even tighter than before. The outer shell has expanded in an effort to help heat from the core escape into space. The red giant is the first step in old age. ...
Neutron star - SharpSchool
... In a black hole, no nuclear fusion is taking place, so it is swallowed by its own gravity making it a black hole ...
... In a black hole, no nuclear fusion is taking place, so it is swallowed by its own gravity making it a black hole ...
Stellar Remnants
... – when a quantum gas is compressed, it heats up, but this temperature increase does not increase the pressure • quantum gases are less “springy” ...
... – when a quantum gas is compressed, it heats up, but this temperature increase does not increase the pressure • quantum gases are less “springy” ...
Abstract
... and find bright young objects there. Lyman α emitters1 have been recently discovered at redshifts greater than 3 (2.1109 yr after the Big-Bang) and Lyman break galaxies2 are high-redshift star-forming galaxies with the intense ultraviolet radiation from young stars. In the theoretical view point, g ...
... and find bright young objects there. Lyman α emitters1 have been recently discovered at redshifts greater than 3 (2.1109 yr after the Big-Bang) and Lyman break galaxies2 are high-redshift star-forming galaxies with the intense ultraviolet radiation from young stars. In the theoretical view point, g ...
Supernova
A supernova is a stellar explosion that briefly outshines an entire galaxy, radiating as much energy as the Sun or any ordinary star is expected to emit over its entire life span, before fading from view over several weeks or months. The extremely luminous burst of radiation expels much or all of a star's material at a velocity of up to 7007300000000000000♠30,000 km/s (10% of the speed of light), driving a shock wave into the surrounding interstellar medium. This shock wave sweeps up an expanding shell of gas and dust called a supernova remnant. Supernovae are potentially strong galactic sources of gravitational waves. A great proportion of primary cosmic rays comes from supernovae.Supernovae are more energetic than novae. Nova means ""new"" in Latin, referring to what appears to be a very bright new star shining in the celestial sphere; the prefix ""super-"" distinguishes supernovae from ordinary novae, which are far less luminous. The word supernova was coined by Walter Baade and Fritz Zwicky in 1931. It is pronounced /ˌsuːpərnoʊvə/ with the plural supernovae /ˌsuːpərnoʊviː/ or supernovas (abbreviated SN, plural SNe after ""supernovae"").Supernovae can be triggered in one of two ways: by the sudden re-ignition of nuclear fusion in a degenerate star; or by the gravitational collapse of the core of a massive star. In the first case, a degenerate white dwarf may accumulate sufficient material from a companion, either through accretion or via a merger, to raise its core temperature, ignite carbon fusion, and trigger runaway nuclear fusion, completely disrupting the star. In the second case, the core of a massive star may undergo sudden gravitational collapse, releasing gravitational potential energy that can create a supernova explosion.The most recent directly observed supernova in the Milky Way was Kepler's Star of 1604 (SN 1604); remnants of two more recent supernovae have been found retrospectively. Observations in other galaxies indicate that supernovae should occur on average about three times every century in the Milky Way, and that any galactic supernova would almost certainly be observable in modern astronomical equipment. Supernovae play a significant role in enriching the interstellar medium with higher mass elements. Furthermore, the expanding shock waves from supernova explosions can trigger the formation of new stars.