Ordering_The_Universe
... “Local” means the galaxies are within a region 3 million light years across. ...
... “Local” means the galaxies are within a region 3 million light years across. ...
Compact Extragalactic Star Formation
... the luminosity function of SSCs, and the mass function of their star formation? • Is optical/IR modeling of star formation in SSCs consistent with radio observations? • How do supernovae evolve in dense environments? ...
... the luminosity function of SSCs, and the mass function of their star formation? • Is optical/IR modeling of star formation in SSCs consistent with radio observations? • How do supernovae evolve in dense environments? ...
Beyond our Sol. System
... Effect. Everything in space is moving away and we can tell by the increasing wavelengths of light that they give off. Mrs. Degl ...
... Effect. Everything in space is moving away and we can tell by the increasing wavelengths of light that they give off. Mrs. Degl ...
The Fate of Massive Stars
... increased opacity due to presence of various Ions (including Fe) in stellar atmosphere Diagonal upper-luminosity cutoff that is temperature dependent Hotter --> Higher Luminosity cutoff Greater mass-loss/stellar winds for cooler stars at lower luminosities Stellar winds important contribution to ISM ...
... increased opacity due to presence of various Ions (including Fe) in stellar atmosphere Diagonal upper-luminosity cutoff that is temperature dependent Hotter --> Higher Luminosity cutoff Greater mass-loss/stellar winds for cooler stars at lower luminosities Stellar winds important contribution to ISM ...
Cosmic context: stars and formation of heavy elements
... nuclei via subsequernt fusion - all the way up to iron • finally explode as supernovae, leaving behind a neutron star or black hole Explosion ejects products of stellar fusion back into the gas of the Galaxy - forms the raw material for new generations of stars “galactic recycling”. ...
... nuclei via subsequernt fusion - all the way up to iron • finally explode as supernovae, leaving behind a neutron star or black hole Explosion ejects products of stellar fusion back into the gas of the Galaxy - forms the raw material for new generations of stars “galactic recycling”. ...
Slides
... (where Hydrogen Is Built Into Helium at a Temperature Of Millions Of Degrees) (you don’t need to know numbers, just the idea below) Mass of 4 H Atoms = 6.693 × 10-24 g Mass of 1 He Atom = 6.645 × 10-24 g Difference ...
... (where Hydrogen Is Built Into Helium at a Temperature Of Millions Of Degrees) (you don’t need to know numbers, just the idea below) Mass of 4 H Atoms = 6.693 × 10-24 g Mass of 1 He Atom = 6.645 × 10-24 g Difference ...
1” “Sky-Notes” of the Open University Astronomy Club. October 2005
... the faint glow of the galaxy. Use high power to push the star out of the field of view for best results. NGC752 (5.7) oc This large open cluster is located about 4 degrees south of . NGC891 (10.1) sg. Located about 3 degrees east of is seen almost edge on. Bright central bulge. Moderate apertures ...
... the faint glow of the galaxy. Use high power to push the star out of the field of view for best results. NGC752 (5.7) oc This large open cluster is located about 4 degrees south of . NGC891 (10.1) sg. Located about 3 degrees east of is seen almost edge on. Bright central bulge. Moderate apertures ...
Regents Earth Science – Unit 5: Astronomy
... Dark Line (Absorption) Spectrum - a continuous spectrum with dark lines where wavelengths have been absorbed lines have the same fingerprint as in a bright line spectra produced by light that produces a continuous spectrum passing through a cooler gas ...
... Dark Line (Absorption) Spectrum - a continuous spectrum with dark lines where wavelengths have been absorbed lines have the same fingerprint as in a bright line spectra produced by light that produces a continuous spectrum passing through a cooler gas ...
Stars
... Supergiants and Supernovas • Stars that are about 8 times more massive than the sun have a more violent star evolution. • The core heats up to much higher temperatures. Heavier and heavier elements form by fusion and the star expands into a supergiant. • Iron forms in the core. Iron cannot release ...
... Supergiants and Supernovas • Stars that are about 8 times more massive than the sun have a more violent star evolution. • The core heats up to much higher temperatures. Heavier and heavier elements form by fusion and the star expands into a supergiant. • Iron forms in the core. Iron cannot release ...
Lesson #5: Constellations - Center for Learning in Action
... safety when handling scissors and to clean up after themselves. Activity: Ask the students what they know about stars. Try to lead them towards the definition: Stars are massive shining spheres of hot gas. The stars you can see with your naked eye in the night sky are part of the Milky Way Galaxy, a ...
... safety when handling scissors and to clean up after themselves. Activity: Ask the students what they know about stars. Try to lead them towards the definition: Stars are massive shining spheres of hot gas. The stars you can see with your naked eye in the night sky are part of the Milky Way Galaxy, a ...
Chapter 16
... that can be supported by electron degeneracy pressure - and that mass corresponds to 1.4 M Any more mass than 1.4 M will cause further collapse until Neutron degeneracy is reached, leading to a neutron star. A Neutron star is essentially a giant iron nucleus comprised of protons and degenerate neu ...
... that can be supported by electron degeneracy pressure - and that mass corresponds to 1.4 M Any more mass than 1.4 M will cause further collapse until Neutron degeneracy is reached, leading to a neutron star. A Neutron star is essentially a giant iron nucleus comprised of protons and degenerate neu ...
Bluffer`s Guide to Orion
... and part of Taurus can be seen at upper right. Diagram created with Starry Night software. years away and thirty light years across, and is the closest region of star formation to Earth. A lot of what proper astronomers know about how stars and planetary systems are formed from collapsing clouds of ...
... and part of Taurus can be seen at upper right. Diagram created with Starry Night software. years away and thirty light years across, and is the closest region of star formation to Earth. A lot of what proper astronomers know about how stars and planetary systems are formed from collapsing clouds of ...
White Dwarf star. Are
... of energy, it is finished. Our sun will run out of energy and it will be finished too. But this will not happen for another 5 billion years! ...
... of energy, it is finished. Our sun will run out of energy and it will be finished too. But this will not happen for another 5 billion years! ...
HighRedshiftGalaxies
... A systematic survey is conducted according to some property that is sensitive to the on-going rate of star formation. The volume-average luminosity density is converted into its equivalent star formation rate averaged per unit co-moving volume and the procedure repeated as a function of redshift to ...
... A systematic survey is conducted according to some property that is sensitive to the on-going rate of star formation. The volume-average luminosity density is converted into its equivalent star formation rate averaged per unit co-moving volume and the procedure repeated as a function of redshift to ...
Observing the Solar System
... an object that orbits the sun and is large enough to have become round due to the force of its own gravity. In addition, a planet has to dominate the neighborhood ...
... an object that orbits the sun and is large enough to have become round due to the force of its own gravity. In addition, a planet has to dominate the neighborhood ...
LIfe of a Star
... Apparent Magnitude: How bright a star appears to be from Earth (observer’s perspective). Absolute Magnitude: How much light the star actually gives off. ...
... Apparent Magnitude: How bright a star appears to be from Earth (observer’s perspective). Absolute Magnitude: How much light the star actually gives off. ...
Miss Nevoral - Ms. Nevoral`s site
... 7. How does the speed at which a galaxy rotates affect its shape? The more spin a galaxy has, the flatter it will be. 8. Besides shape, what other ways do galaxies differ from each other? Galaxies differ in size, mass, brightness, colour, and speed of spin. 9. Describe the two different types of sta ...
... 7. How does the speed at which a galaxy rotates affect its shape? The more spin a galaxy has, the flatter it will be. 8. Besides shape, what other ways do galaxies differ from each other? Galaxies differ in size, mass, brightness, colour, and speed of spin. 9. Describe the two different types of sta ...
SAMPLE TEST: Stars and Galaxies Multiple Choice Identify the letter
... 47. The most basic way to measure the distance to a star is ____________________. 48. A light-year is the distance ____________________ travels in a year. 49. Apparent magnitude refers to a star’s ____________________ as it appears from ____________________. 50. Some stars, called _________________ ...
... 47. The most basic way to measure the distance to a star is ____________________. 48. A light-year is the distance ____________________ travels in a year. 49. Apparent magnitude refers to a star’s ____________________ as it appears from ____________________. 50. Some stars, called _________________ ...
The Milky Way - Houston Community College System
... Object (BN): Hot star, just reaching the main sequence ...
... Object (BN): Hot star, just reaching the main sequence ...
Problem 4: magnitude of the star?
... E. The change in size of the star cannot be determined __C___15. The Milky Way galaxy has a bulge and disk characterstic of spiral galaxies. These features are most plainly seen in images taken in A. Visible light B. Ultraviolet light C. Infrared light D. 21cm radio observations E. X-rays __D___16. ...
... E. The change in size of the star cannot be determined __C___15. The Milky Way galaxy has a bulge and disk characterstic of spiral galaxies. These features are most plainly seen in images taken in A. Visible light B. Ultraviolet light C. Infrared light D. 21cm radio observations E. X-rays __D___16. ...
Review Game
... protostar, main-sequence, red giant, white dwarf 80 times the mass of Jupiter when nuclear fusion begins in the core The rotation rate increases and results in a disk of material around a protostar. core, radiation zone, convection zone, photosphere, chromosphere, corona areas of the corona where ma ...
... protostar, main-sequence, red giant, white dwarf 80 times the mass of Jupiter when nuclear fusion begins in the core The rotation rate increases and results in a disk of material around a protostar. core, radiation zone, convection zone, photosphere, chromosphere, corona areas of the corona where ma ...
Stars Power Point
... • For example – when look at a neon sign WOULD NOT see a continuous spectrum but would see EMISSION LINES • Emission Lines are lines made when certain wave lengths of light or COLORS are given off by hot gases • Bright Line (Emission)-A spectrum consisting of individual lines at unique spots. ...
... • For example – when look at a neon sign WOULD NOT see a continuous spectrum but would see EMISSION LINES • Emission Lines are lines made when certain wave lengths of light or COLORS are given off by hot gases • Bright Line (Emission)-A spectrum consisting of individual lines at unique spots. ...
Stellar Evolution - Hays High School
... form – More massive stars can completely form in a few hundred thousand years ...
... form – More massive stars can completely form in a few hundred thousand years ...
The Lives of Stars From Birth Through Middle Age (Chapter 9)
... 1. A helium-3 atom and a helium-4 atom combine to form a beryllium-7 (four protons and three neutrons) and a gamma ray. 2. A beryllium-7 atom captures an electron to become lithium-7 atom (three protons and four neutrons) and a neutrino. 3. The lithium-7 combines with a proton to form two helium-4 a ...
... 1. A helium-3 atom and a helium-4 atom combine to form a beryllium-7 (four protons and three neutrons) and a gamma ray. 2. A beryllium-7 atom captures an electron to become lithium-7 atom (three protons and four neutrons) and a neutrino. 3. The lithium-7 combines with a proton to form two helium-4 a ...
H II region
An H II region is a large, low-density cloud of partially ionized gas in which star formation has recently taken place. The short-lived blue stars forged in these regions emit copious amounts of ultraviolet light that ionize the surrounding gas. H II regions—sometimes several hundred light-years across—are often associated with giant molecular clouds. The first known H II region was the Orion Nebula, which was discovered in 1610 by Nicolas-Claude Fabri de Peiresc.H II regions are named for the large amount of ionised atomic hydrogen they contain, referred to as H II, pronounced H-two by astronomers (an H I region being neutral atomic hydrogen, and H2 being molecular hydrogen). Such regions have extremely diverse shapes, because the distribution of the stars and gas inside them is irregular. They often appear clumpy and filamentary, sometimes showing bizarre shapes such as the Horsehead Nebula. H II regions may give birth to thousands of stars over a period of several million years. In the end, supernova explosions and strong stellar winds from the most massive stars in the resulting star cluster will disperse the gases of the H II region, leaving behind a cluster of birthed stars such as the Pleiades.H II regions can be seen to considerable distances in the universe, and the study of extragalactic H II regions is important in determining the distance and chemical composition of other galaxies. Spiral and irregular galaxies contain many H II regions, while elliptical galaxies are almost devoid of them. In the spiral galaxies, including the Milky Way, H II regions are concentrated in the spiral arms, while in the irregular galaxies they are distributed chaotically. Some galaxies contain huge H II regions, which may contain tens of thousands of stars. Examples include the 30 Doradus region in the Large Magellanic Cloud and NGC 604 in the Triangulum Galaxy.