Deep Space (PDF: 224k)
... hotter photosphere. Hotter objects glow bluer like the metal under an arcwelder’s spark. The most massive stars are so hot that most of their energy is emitted beyond blue in the ultraviolet. You’ll need SPF 10,000 if you ever visit Sirius, the bright blue star in the summer sky! Less-massive stars ...
... hotter photosphere. Hotter objects glow bluer like the metal under an arcwelder’s spark. The most massive stars are so hot that most of their energy is emitted beyond blue in the ultraviolet. You’ll need SPF 10,000 if you ever visit Sirius, the bright blue star in the summer sky! Less-massive stars ...
How Stars Form Powerpoint
... Star-Forming Regions • Formation happens when part of a dust cloud begins to contract under its own gravitational force • Center becomes hotter and hotter until nuclear fusion begins in the core. ...
... Star-Forming Regions • Formation happens when part of a dust cloud begins to contract under its own gravitational force • Center becomes hotter and hotter until nuclear fusion begins in the core. ...
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... Nuclear reactions So – what are the specific reactions are we talking about?? The probability that four H atoms will collide at once to form a single He atom is exceedingly small. Even this simple fusion reaction must occur via a number of steps. ...
... Nuclear reactions So – what are the specific reactions are we talking about?? The probability that four H atoms will collide at once to form a single He atom is exceedingly small. Even this simple fusion reaction must occur via a number of steps. ...
Section 3: Evolution of Stars pages 114-119
... A star is born when the contracting gas and dust become so hot that nuclear fusion starts. Are classified by: ____________________________________________________ Protostar __________________ pulls huge nebulas of hydrogen gas and dust into a single spinning cloud. As the particles cras ...
... A star is born when the contracting gas and dust become so hot that nuclear fusion starts. Are classified by: ____________________________________________________ Protostar __________________ pulls huge nebulas of hydrogen gas and dust into a single spinning cloud. As the particles cras ...
The correct answers are written in bold, italic and underlined. The
... 15. Tritium is a radioactive form of hydrogen in which the nucleus contains one proton and two neutrons. How much more massive is this nucleus than that of ordinary hydrogen? • The same mass because this nucleus is still hydrogen • Three times as massive • Twice as massive 16. Electron transitions b ...
... 15. Tritium is a radioactive form of hydrogen in which the nucleus contains one proton and two neutrons. How much more massive is this nucleus than that of ordinary hydrogen? • The same mass because this nucleus is still hydrogen • Three times as massive • Twice as massive 16. Electron transitions b ...
Unit Two Worksheet – Astronomy
... a dark cloud of gas and dust in space Serves as the second step in the development of a star, the center of a shrinking, spinning nebula Anomaly in space with a gravity so tremendous that light cannot escape from it; generated by the collapse of a very large supernova Combination of the nuclei of at ...
... a dark cloud of gas and dust in space Serves as the second step in the development of a star, the center of a shrinking, spinning nebula Anomaly in space with a gravity so tremendous that light cannot escape from it; generated by the collapse of a very large supernova Combination of the nuclei of at ...
Death of Stars
... Describe the types of nuclear reactions involved in main sequence and post-main sequence stars ...
... Describe the types of nuclear reactions involved in main sequence and post-main sequence stars ...
The Sun - Ccphysics.us
... Observatory's Solar Synoptic Network, said in a news briefing today (June 14, 2011). "This is highly unusual and unexpected," Hill said. "But the fact that three completely different views of the sun point in the same direction is a powerful indicator that the sunspot cycle may be going into ...
... Observatory's Solar Synoptic Network, said in a news briefing today (June 14, 2011). "This is highly unusual and unexpected," Hill said. "But the fact that three completely different views of the sun point in the same direction is a powerful indicator that the sunspot cycle may be going into ...
Star Of Wonder
... into space. The remaining portion of the star then collapses still further to become either a "neutron star" just a few kilometers across, or a "black hole" that is far smaller than even the tiny nucleus of an atom and yet contains the entire mass of the star. Earth, including your body, is formed p ...
... into space. The remaining portion of the star then collapses still further to become either a "neutron star" just a few kilometers across, or a "black hole" that is far smaller than even the tiny nucleus of an atom and yet contains the entire mass of the star. Earth, including your body, is formed p ...
test - Scioly.org
... D) J075141 lJl74L4A E) SS Cygd 65) Which ashonomical object on this year's list is described as "a spherical collection of hundreds of thousands of stars in the outer halo of the Large Magellanic Cloud that catbe seen from the southern fusmisphere." D) NGC 1846 A) SNR G1.9+0.3 E) SNR 0s09-67.s B) SS ...
... D) J075141 lJl74L4A E) SS Cygd 65) Which ashonomical object on this year's list is described as "a spherical collection of hundreds of thousands of stars in the outer halo of the Large Magellanic Cloud that catbe seen from the southern fusmisphere." D) NGC 1846 A) SNR G1.9+0.3 E) SNR 0s09-67.s B) SS ...
Star in a Box Worksheet - Beginning with solutions
... B. By adjusting the mass of the star in the “Star Properties” you can explore the evolution of different stars. 1. Where do the different mass stars lie on the main sequence? S maller stars towards the bottom right, more massive stars towards the upper left. 2. List the different final stages of ...
... B. By adjusting the mass of the star in the “Star Properties” you can explore the evolution of different stars. 1. Where do the different mass stars lie on the main sequence? S maller stars towards the bottom right, more massive stars towards the upper left. 2. List the different final stages of ...
Type II supernova
A Type II supernova (plural: supernovae or supernovas) results from the rapid collapse and violent explosion of a massive star. A star must have at least 8 times, and no more than 40–50 times, the mass of the Sun (M☉) for this type of explosion. It is distinguished from other types of supernovae by the presence of hydrogen in its spectrum. Type II supernovae are mainly observed in the spiral arms of galaxies and in H II regions, but not in elliptical galaxies.Stars generate energy by the nuclear fusion of elements. Unlike the Sun, massive stars possess the mass needed to fuse elements that have an atomic mass greater than hydrogen and helium, albeit at increasingly higher temperatures and pressures, causing increasingly shorter stellar life spans. The degeneracy pressure of electrons and the energy generated by these fusion reactions are sufficient to counter the force of gravity and prevent the star from collapsing, maintaining stellar equilibrium. The star fuses increasingly higher mass elements, starting with hydrogen and then helium, progressing up through the periodic table until a core of iron and nickel is produced. Fusion of iron or nickel produces no net energy output, so no further fusion can take place, leaving the nickel-iron core inert. Due to the lack of energy output allowing outward pressure, equilibrium is broken.When the mass of the inert core exceeds the Chandrasekhar limit of about 1.4 M☉, electron degeneracy alone is no longer sufficient to counter gravity and maintain stellar equilibrium. A cataclysmic implosion takes place within seconds, in which the outer core reaches an inward velocity of up to 23% of the speed of light and the inner core reaches temperatures of up to 100 billion kelvin. Neutrons and neutrinos are formed via reversed beta-decay, releasing about 1046 joules (100 foes) in a ten-second burst. The collapse is halted by neutron degeneracy, causing the implosion to rebound and bounce outward. The energy of this expanding shock wave is sufficient to accelerate the surrounding stellar material to escape velocity, forming a supernova explosion, while the shock wave and extremely high temperature and pressure briefly allow for theproduction of elements heavier than iron. Depending on initial size of the star, the remnants of the core form a neutron star or a black hole. Because of the underlying mechanism, the resulting nova is also described as a core-collapse supernova.There exist several categories of Type II supernova explosions, which are categorized based on the resulting light curve—a graph of luminosity versus time—following the explosion. Type II-L supernovae show a steady (linear) decline of the light curve following the explosion, whereas Type II-P display a period of slower decline (a plateau) in their light curve followed by a normal decay. Type Ib and Ic supernovae are a type of core-collapse supernova for a massive star that has shed its outer envelope of hydrogen and (for Type Ic) helium. As a result, they appear to be lacking in these elements.