1_Introduction - Department of Astronomy
... Galaxies form because ordinary matter cools down (by emitting photons) and falls to the center of dark halos. ...
... Galaxies form because ordinary matter cools down (by emitting photons) and falls to the center of dark halos. ...
Stellar evolution, I
... changed the composition of the interstellar medium. Subsequent generations of stars start their main sequence phases with different initial compositions. ...
... changed the composition of the interstellar medium. Subsequent generations of stars start their main sequence phases with different initial compositions. ...
The Life Cycle of Stars Webquest
... 1. In this webquest, you will learn how to identify stars by their magnitude, color, temperature, and spectral class. 2. You will investigate the process of nuclear fusion explained by Einstein's famous equation E = MC2 and learn how mass in the form of hydrogen atoms is converted to helium and caus ...
... 1. In this webquest, you will learn how to identify stars by their magnitude, color, temperature, and spectral class. 2. You will investigate the process of nuclear fusion explained by Einstein's famous equation E = MC2 and learn how mass in the form of hydrogen atoms is converted to helium and caus ...
The Life Cycle of Stars Webquest
... 1. In this webquest, you will learn how to identify stars by their magnitude, color, temperature, and spectral class. 2. You will investigate the process of nuclear fusion explained by Einstein's famous equation E = MC2 and learn how mass in the form of hydrogen atoms is converted to helium and caus ...
... 1. In this webquest, you will learn how to identify stars by their magnitude, color, temperature, and spectral class. 2. You will investigate the process of nuclear fusion explained by Einstein's famous equation E = MC2 and learn how mass in the form of hydrogen atoms is converted to helium and caus ...
Chapter 18 Study Guide
... 1. What does a refracting telescope use as its objective to gather and focus light? A refracting telescope uses a lens as its objective. 2. What does a reflecting telescope use as its objective to gather and focus light? A reflecting telescope uses a mirror as its objective. 3. What characteristics ...
... 1. What does a refracting telescope use as its objective to gather and focus light? A refracting telescope uses a lens as its objective. 2. What does a reflecting telescope use as its objective to gather and focus light? A reflecting telescope uses a mirror as its objective. 3. What characteristics ...
Stages 12 to 14
... The core will contract until electron degeneracy pressure once again takes over, and contraction ends If the star is similar to the sun, the mass is too small, the ignition temperature is never reached. ...
... The core will contract until electron degeneracy pressure once again takes over, and contraction ends If the star is similar to the sun, the mass is too small, the ignition temperature is never reached. ...
Stars
... • When iron core exceeds about 1.4 solar masses, the temperature becomes high enough to cause nuclear reactions for iron • Nuclear burning causes further core collapse, which raises the density and accelerates the nuclear reactions. • In 0.2 seconds (!) the core collapses, fusing iron into lighter a ...
... • When iron core exceeds about 1.4 solar masses, the temperature becomes high enough to cause nuclear reactions for iron • Nuclear burning causes further core collapse, which raises the density and accelerates the nuclear reactions. • In 0.2 seconds (!) the core collapses, fusing iron into lighter a ...
Fusion Fuels, Resource Base, Solar System.
... the total yield, ~14 MeV, is carried off by a useless fast neutron. Since they are charge-less, it is very difficult to harness neutrons. (3) logistics, the tritium has a half-life of only 12 years. Even for bombs, it has to be bred and replaced continually. For a centuries-long voyage, tritium is t ...
... the total yield, ~14 MeV, is carried off by a useless fast neutron. Since they are charge-less, it is very difficult to harness neutrons. (3) logistics, the tritium has a half-life of only 12 years. Even for bombs, it has to be bred and replaced continually. For a centuries-long voyage, tritium is t ...
Chapter 25
... See you in Unit 3 for Advanced. For Chemistry, we are finally DONE with new material, so let’s gets started reviewing EVERYTHING ELSE we learned for the SOL, which is coming up ...
... See you in Unit 3 for Advanced. For Chemistry, we are finally DONE with new material, so let’s gets started reviewing EVERYTHING ELSE we learned for the SOL, which is coming up ...
How stars form slide show File
... protons prevents them becoming close when they move towards each other. • As the temperature increases further the protons become closer. During nuclear fusion two protons become so close that the ‘Strong nuclear force’ grabs them and holds them together, this releases lots of energy. •This force on ...
... protons prevents them becoming close when they move towards each other. • As the temperature increases further the protons become closer. During nuclear fusion two protons become so close that the ‘Strong nuclear force’ grabs them and holds them together, this releases lots of energy. •This force on ...
AY1 Homework for Quiz 2: Spring 2017
... 15. For two stars on the Main Sequence of the H-‐R Diagram, compare the luminosity of Star F and Star G if Star G has a higher surface temperature and is at twice the distance of Star F. ...
... 15. For two stars on the Main Sequence of the H-‐R Diagram, compare the luminosity of Star F and Star G if Star G has a higher surface temperature and is at twice the distance of Star F. ...
1 slide per page() - Wayne State University Physics and Astronomy
... Energy in a Fission Process Binding energy for heavy nuclei is about 7.2 MeV per nucleon Binding energy for intermediate nuclei is about 8.2 MeV per nucleon Therefore, the fission fragments have less mass than the nucleons in the original nuclei This decrease in mass per nucleon appears as ...
... Energy in a Fission Process Binding energy for heavy nuclei is about 7.2 MeV per nucleon Binding energy for intermediate nuclei is about 8.2 MeV per nucleon Therefore, the fission fragments have less mass than the nucleons in the original nuclei This decrease in mass per nucleon appears as ...
ppt
... Energy in a Fission Process Binding energy for heavy nuclei is about 7.2 MeV per nucleon Binding energy for intermediate nuclei is about 8.2 MeV per nucleon Therefore, the fission fragments have less mass than the nucleons in the original nuclei This decrease in mass per nucleon appears as ...
... Energy in a Fission Process Binding energy for heavy nuclei is about 7.2 MeV per nucleon Binding energy for intermediate nuclei is about 8.2 MeV per nucleon Therefore, the fission fragments have less mass than the nucleons in the original nuclei This decrease in mass per nucleon appears as ...
Astro 10: Introductory Astronomy
... connection between alternate universes and the nature of life ...
... connection between alternate universes and the nature of life ...
The universe - Villanova University
... K, universe is now sufficiently rare to allow a lot of atoms to form, which they do. Photons can now move large distances. Universe is “visible”. ...
... K, universe is now sufficiently rare to allow a lot of atoms to form, which they do. Photons can now move large distances. Universe is “visible”. ...
Document
... statements is true? (a) The alpha particle has more kinetic energy than the daughter nucleus. (b) The daughter nucleus has more kinetic energy than the alpha particle. (c) The daughter nucleus and the alpha particle have the same kinetic energy. (a). Conservation of momentum requires the momenta of ...
... statements is true? (a) The alpha particle has more kinetic energy than the daughter nucleus. (b) The daughter nucleus has more kinetic energy than the alpha particle. (c) The daughter nucleus and the alpha particle have the same kinetic energy. (a). Conservation of momentum requires the momenta of ...
Sun Physics
... Sunspots are dark spots on the photosphere, typically with the same diameter as the Earth. They have cooler temperatures than the photosphere. The center of a spot, the umbra, looks dark gray if heavily filtered and is only 4500 K (as compared to the photosphere at 6000K). Around it is the penumbra, ...
... Sunspots are dark spots on the photosphere, typically with the same diameter as the Earth. They have cooler temperatures than the photosphere. The center of a spot, the umbra, looks dark gray if heavily filtered and is only 4500 K (as compared to the photosphere at 6000K). Around it is the penumbra, ...
Astronomy 12: Introduction to Astronomy
... d. The region on the H-R diagram where protostars first appear. 3. Define hydrogen burning. a. The formation of a hydrogen gas cloud, also known as a nebula. b. The chemical combustion of hydrogen. c. The separation of the hydrogen envelope to form a planetary nebula. d. The formation of helium by f ...
... d. The region on the H-R diagram where protostars first appear. 3. Define hydrogen burning. a. The formation of a hydrogen gas cloud, also known as a nebula. b. The chemical combustion of hydrogen. c. The separation of the hydrogen envelope to form a planetary nebula. d. The formation of helium by f ...
Origin of the Chemical Elements
... Chemical elements are central for the existence of life and the richness and variety of our environment. Therefore, one of the basic questions concerns the origin of the chemical elements. The answer is complex because it relies on dynamical processes from elementary particles and nuclei to stars an ...
... Chemical elements are central for the existence of life and the richness and variety of our environment. Therefore, one of the basic questions concerns the origin of the chemical elements. The answer is complex because it relies on dynamical processes from elementary particles and nuclei to stars an ...
Stars_and_Galaxies
... Gravity gathers hydrogen gas and particles of dust, and the clouds grow more dense. The hydrogen heats up to a fantastic 18 million degrees. Nuclear fusion turns hydrogen to helium and the fire ignites. T or F. Gravity is always at work, trying to crunch the star down. Stellar age is determined by t ...
... Gravity gathers hydrogen gas and particles of dust, and the clouds grow more dense. The hydrogen heats up to a fantastic 18 million degrees. Nuclear fusion turns hydrogen to helium and the fire ignites. T or F. Gravity is always at work, trying to crunch the star down. Stellar age is determined by t ...
P-nuclei
p-Nuclei (p stands for proton-rich) are certain proton-rich, naturally occurring isotopes of some elements between selenium and mercury which cannot be produced in either s- or r-process.