Document
... And we know how bright it should be, Result Distance We do this everyday with size. ...
... And we know how bright it should be, Result Distance We do this everyday with size. ...
No Slide Title
... Classification of Stars By using a spectrometer astronomers began to obtain spectra from many stars and began to group them in categories according to similar spectra. They named the categories according to the letters of the alphabet A, B, C,……etc. Once they realized all stars were made of the same ...
... Classification of Stars By using a spectrometer astronomers began to obtain spectra from many stars and began to group them in categories according to similar spectra. They named the categories according to the letters of the alphabet A, B, C,……etc. Once they realized all stars were made of the same ...
CARBON STARS
... • Classical models of giant stars don’t allow for a convective zone deep enough to dredge-up the carbon material formed in deeper layers • BUT – a He shell flash can create a convective zone, and if hot enough can penetrate the H shell and bring material to the surface ...
... • Classical models of giant stars don’t allow for a convective zone deep enough to dredge-up the carbon material formed in deeper layers • BUT – a He shell flash can create a convective zone, and if hot enough can penetrate the H shell and bring material to the surface ...
Astronomy Test Review
... 13. Parallax is the apparent displacement (movement) of an object due to the change in position of the observer. 14. Apparent magnitude is how bright a star is as seen from Earth where as absolute magnitude is the brightness of a star from a standard ...
... 13. Parallax is the apparent displacement (movement) of an object due to the change in position of the observer. 14. Apparent magnitude is how bright a star is as seen from Earth where as absolute magnitude is the brightness of a star from a standard ...
KOI-54 Claude Plymate There is a star system about 45 light years
... There is a star system about 45 light years away in the constellation Cygnus. The system we know as HD 187091 (also known as KOI-54 for Kepler Object of Interest 54) is an undistinguished 8th magnitude A star or was before the Kepler telescope took a close look. As it turns out, the system is anythi ...
... There is a star system about 45 light years away in the constellation Cygnus. The system we know as HD 187091 (also known as KOI-54 for Kepler Object of Interest 54) is an undistinguished 8th magnitude A star or was before the Kepler telescope took a close look. As it turns out, the system is anythi ...
Astronomy 103 Final review session - Home | UW
... – A mass of gas burning hydrogen in helium in its core – In hydrostatic equilibrium, and so therefore stable ...
... – A mass of gas burning hydrogen in helium in its core – In hydrostatic equilibrium, and so therefore stable ...
Exploring the Universe
... microwaves that are emitted all over the sky i. Scientists believe that these microwaves are the remains of the radiation produced during the Big ...
... microwaves that are emitted all over the sky i. Scientists believe that these microwaves are the remains of the radiation produced during the Big ...
Basic Properties of Stars
... O stars are hot, luminous, most massive; M are stars cool, faint, least massive ...
... O stars are hot, luminous, most massive; M are stars cool, faint, least massive ...
Life cycle of Stars Notes
... • White dwarfs, are the carbon and oxygen cores of dead stars. • WD are about the size of earth. • The more massive a WD is, the smaller it is in size. ...
... • White dwarfs, are the carbon and oxygen cores of dead stars. • WD are about the size of earth. • The more massive a WD is, the smaller it is in size. ...
Spectral Classification
... slightly cooler than our Sun. Some K stars are giants and supergiants, such as Arcturus while others are main sequence stars. These make up some 13% of main sequence stars. Examples: Acrturus ...
... slightly cooler than our Sun. Some K stars are giants and supergiants, such as Arcturus while others are main sequence stars. These make up some 13% of main sequence stars. Examples: Acrturus ...
The Milky Way
... And we know how bright it should be, Result Distance We do this everyday with size. ...
... And we know how bright it should be, Result Distance We do this everyday with size. ...
Name Date ______ Period _____ Earth Science Chapter 25 Study
... Patterns of stars called ____________________ were originally named in honor of mythological characters or great heroes. The most basic way to measure the distance to a star is ____________________. A light-year is the distance ____________________ travels in a year. Apparent magnitude refers to a s ...
... Patterns of stars called ____________________ were originally named in honor of mythological characters or great heroes. The most basic way to measure the distance to a star is ____________________. A light-year is the distance ____________________ travels in a year. Apparent magnitude refers to a s ...
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. ...
Stellar and Atomic Spectra
... Spectral classification of stars • The spectral classification essentially sorts stars according to their surface temperature.Sequence is: O B A F G K M • O type is hottest (~25,000K), M type is coolest (~2500K) • Star Colors: O blue to M red • Sequence subdivided by attaching one numerical digit, ...
... Spectral classification of stars • The spectral classification essentially sorts stars according to their surface temperature.Sequence is: O B A F G K M • O type is hottest (~25,000K), M type is coolest (~2500K) • Star Colors: O blue to M red • Sequence subdivided by attaching one numerical digit, ...
answers - Salem State University
... 13. A white dwarf will not have exhausted its potential carbon fuel, but there is not sufficient gravity to compress its carbon nuclei and electrons further. So there will be emission but not sufficient to be a very luminous star given its size (slight bigger than our Sun). 14. A nova is fusion on t ...
... 13. A white dwarf will not have exhausted its potential carbon fuel, but there is not sufficient gravity to compress its carbon nuclei and electrons further. So there will be emission but not sufficient to be a very luminous star given its size (slight bigger than our Sun). 14. A nova is fusion on t ...
Star Formation
... Hertzsprung-Russell Diagram • The chart of the stars’ luminosity vs. temperature is called the Hertzsprung-Russell diagram. • This is the H-R diagram for hundreds of nearby stars. – Temperature decreases to the right ...
... Hertzsprung-Russell Diagram • The chart of the stars’ luminosity vs. temperature is called the Hertzsprung-Russell diagram. • This is the H-R diagram for hundreds of nearby stars. – Temperature decreases to the right ...
Characteristics of Stars
... • Are hot balls of plasma that shine because nuclear fusion is happening at their cores… they create their own light • Have different characteristics which allow many different ‘varieties’ of stars to exist ...
... • Are hot balls of plasma that shine because nuclear fusion is happening at their cores… they create their own light • Have different characteristics which allow many different ‘varieties’ of stars to exist ...
Document
... And we know how bright it should be, Result Distance We do this everyday with size. ...
... And we know how bright it should be, Result Distance We do this everyday with size. ...
iClicker Questions
... The shockwave from a nearby supernova b) The shockwave from a newly formed high-mass star that is nearby c) The shockwave experienced by the cloud as it passes through a spiral arm d) All of the above ...
... The shockwave from a nearby supernova b) The shockwave from a newly formed high-mass star that is nearby c) The shockwave experienced by the cloud as it passes through a spiral arm d) All of the above ...
Classifying the Spectra of Stars:
... In an absorption line less energy is transported than in the neighboring continuum. The continuum represents the area where the pure blackbody emission spectrum of the star appears, unaffected by the presence of spectral features due to absorption. The amount of this energy deficit is proportional t ...
... In an absorption line less energy is transported than in the neighboring continuum. The continuum represents the area where the pure blackbody emission spectrum of the star appears, unaffected by the presence of spectral features due to absorption. The amount of this energy deficit is proportional t ...
HR diagram
... Spectral class is defined by the type, number and strength of spectral lines observed in a star’s optical spectrum. Spectral classes are coded by letter: O, B, A, F, G, K, M. Spectral class and color are defined by the star’s temperature. ...
... Spectral class is defined by the type, number and strength of spectral lines observed in a star’s optical spectrum. Spectral classes are coded by letter: O, B, A, F, G, K, M. Spectral class and color are defined by the star’s temperature. ...
Stars and Their Characteristics
... properties of the body or by its gravitational effect on the bodies around it – more mass = more gravitational effect ...
... properties of the body or by its gravitational effect on the bodies around it – more mass = more gravitational effect ...
Distant Stars Lesson Plan
... Assessment options: Here are two assessment options: 1. Take a simple quiz. Print and distribute the quiz on page 4. Here are the answers: What is the one factor that determines a star’s color? Answer: b) Its temperature On the H-R Diagram, most stars fall on the diagonal line from the upper lef ...
... Assessment options: Here are two assessment options: 1. Take a simple quiz. Print and distribute the quiz on page 4. Here are the answers: What is the one factor that determines a star’s color? Answer: b) Its temperature On the H-R Diagram, most stars fall on the diagonal line from the upper lef ...
Stellar classification
In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Light from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colors interspersed with absorption lines. Each line indicates an ion of a certain chemical element, with the line strength indicating the abundance of that ion. The relative abundance of the different ions varies with the temperature of the photosphere. The spectral class of a star is a short code summarizing the ionization state, giving an objective measure of the photosphere's temperature and density.Most stars are currently classified under the Morgan–Keenan (MK) system using the letters O, B, A, F, G, K, and M, a sequence from the hottest (O type) to the coolest (M type). Each letter class is then subdivided using a numeric digit with 0 being hottest and 9 being coolest (e.g. A8, A9, F0, F1 form a sequence from hotter to cooler). The sequence has been expanded with classes for other stars and star-like objects that do not fit in the classical system, such class D for white dwarfs and class C for carbon stars.In the MK system a luminosity class is added to the spectral class using Roman numerals. This is based on the width of certain absorption lines in the star's spectrum which vary with the density of the atmosphere and so distinguish giant stars from dwarfs. Luminosity class 0 or Ia+ stars for hypergiants, class I stars for supergiants, class II for bright giants, class III for regular giants, class IV for sub-giants, class V for main-sequence stars, class sd for sub-dwarfs, and class D for white dwarfs. The full spectral class for the Sun is then G2V, indicating a main-sequence star with a temperature around 5,800K.