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Linking Asteroids and Meteorites through Reflectance
... plotted spectral type (temperature) versus stellar luminosity • Saw trends in the plots • Stars did not plot randomly ...
... plotted spectral type (temperature) versus stellar luminosity • Saw trends in the plots • Stars did not plot randomly ...
PH142 - Mohawk Valley Community College
... The purpose of this course is to give a student a full introductory coverage of astronomy, to provide a means of scientific explanation for new astronomical discoveries and theories, and to put into practice techniques learned in Descriptive Astronomy 1. At the conclusion of the course, the students ...
... The purpose of this course is to give a student a full introductory coverage of astronomy, to provide a means of scientific explanation for new astronomical discoveries and theories, and to put into practice techniques learned in Descriptive Astronomy 1. At the conclusion of the course, the students ...
Document
... 1. It has been determined that all stars have the same general composition (90% H, 9% He, trace amounts of heavy elements). If this is the case, explain why stars of different temperatures show different spectral line patterns. ...
... 1. It has been determined that all stars have the same general composition (90% H, 9% He, trace amounts of heavy elements). If this is the case, explain why stars of different temperatures show different spectral line patterns. ...
Spectroscopy – the study of the colors of light (the spectrum) given
... is actually similar for all stars, the different intensities of H-lines from one star to another is due to differences in temperature causing different levels of ionization. ...
... is actually similar for all stars, the different intensities of H-lines from one star to another is due to differences in temperature causing different levels of ionization. ...
The classification of stellar spectra
... - neutral element: H I, He I, Fe I, etc. - single-ionized element: H II, O II, etc. - double-ionized element: O III, etc. ...
... - neutral element: H I, He I, Fe I, etc. - single-ionized element: H II, O II, etc. - double-ionized element: O III, etc. ...
STARS
... while stars of minimum mass (red dwarfs) burn their fuel very slowly and last tens to hundreds of billions of years. ...
... while stars of minimum mass (red dwarfs) burn their fuel very slowly and last tens to hundreds of billions of years. ...
Chapter 28 Notes
... A group of stars that appear to form a pattern in the sky How many constellations can be seen from the northern and southern hemispheres? ...
... A group of stars that appear to form a pattern in the sky How many constellations can be seen from the northern and southern hemispheres? ...
the life cycle of stars
... become giants or supergiants (Right) and then down to the left to become white dwarfs. ...
... become giants or supergiants (Right) and then down to the left to become white dwarfs. ...
Stars and Their Characteristics
... star would be if all stars were at the same distance from Earth – The more negative the number, the brighter the star ...
... star would be if all stars were at the same distance from Earth – The more negative the number, the brighter the star ...
15.3 The Lives of Stars
... • Supernovas are giant explosions from dying stars • Left over core is called a Neutron Star ...
... • Supernovas are giant explosions from dying stars • Left over core is called a Neutron Star ...
Slide 1 - Beverley High School
... • They are using up their hydrogen fuel tremendously quickly. So they are extremely short lived (c10 000 000 years) • These high mass stars finish their lives in massive supernova explosions • At the bottom right the stars are cool. These low mass stars are very long lived as they use their fuel so ...
... • They are using up their hydrogen fuel tremendously quickly. So they are extremely short lived (c10 000 000 years) • These high mass stars finish their lives in massive supernova explosions • At the bottom right the stars are cool. These low mass stars are very long lived as they use their fuel so ...
Lecture 10-11 - OSU Astronomy
... Edward Pickering & Williamina Fleming made a first attempt to classify ~10,000 stars by their spectra: • Sorted by Hydrogen absorption-line strength • Spectral Type “A” = strongest Hydrogen lines • followed by types B, C, D, etc. (weaker) ...
... Edward Pickering & Williamina Fleming made a first attempt to classify ~10,000 stars by their spectra: • Sorted by Hydrogen absorption-line strength • Spectral Type “A” = strongest Hydrogen lines • followed by types B, C, D, etc. (weaker) ...
What are the Spectral Lines? - University of Texas Astronomy Home
... • Figuring out the composition of the stars: - spectral analysis (absorption and emission lines) - Harvard classification: stars can be grouped according to spectral type (and thus surface temperature) ...
... • Figuring out the composition of the stars: - spectral analysis (absorption and emission lines) - Harvard classification: stars can be grouped according to spectral type (and thus surface temperature) ...
The Spectroscope
... the composition of objects made up of hot incandescent gases (like stars) and cool gases (like planetary atmospheres). Spectrometers are used to analyze the amounts and types of spectral light that comes from objects in space. ...
... the composition of objects made up of hot incandescent gases (like stars) and cool gases (like planetary atmospheres). Spectrometers are used to analyze the amounts and types of spectral light that comes from objects in space. ...
What are stars?
... - We know now that the stars in a constellation are not necessarily very close together, but appear to be due to our line of sight - Examples – Orion, Ursa Major (Big Dipper) ...
... - We know now that the stars in a constellation are not necessarily very close together, but appear to be due to our line of sight - Examples – Orion, Ursa Major (Big Dipper) ...
Science 8 Name: Unit 2 Astronomy Date: Period: LAB
... that exists between the average surface temperature of stars and their absolute magnitude. Absolute magnitude is how bright stars would appear to be if they were all the same distance away from Earth. Rather than speak of brightness of stars we often use the word “luminosity.” Luminosity of stars is ...
... that exists between the average surface temperature of stars and their absolute magnitude. Absolute magnitude is how bright stars would appear to be if they were all the same distance away from Earth. Rather than speak of brightness of stars we often use the word “luminosity.” Luminosity of stars is ...
Star Classification
... Most stars, including the sun, are "main sequence stars," fueled by nuclear fusion converting hydrogen into helium. For these stars, the hotter they are, the brighter. These stars are in the most stable part of their existence; this stage generally lasts for about 5 billion years. As stars begin to ...
... Most stars, including the sun, are "main sequence stars," fueled by nuclear fusion converting hydrogen into helium. For these stars, the hotter they are, the brighter. These stars are in the most stable part of their existence; this stage generally lasts for about 5 billion years. As stars begin to ...
10.5 The Hertzsprung
... The darkened curve is called the Main Sequence, as this is where most stars are. Also indicated is the white dwarf region; these stars are hot but not very luminous, as they are quite small. ...
... The darkened curve is called the Main Sequence, as this is where most stars are. Also indicated is the white dwarf region; these stars are hot but not very luminous, as they are quite small. ...
Star Life Cycles
... After becoming a planetary nebula, the remains of the core of the star become a white dwarf. A white dwarf is a star that has exhausted most or all of its nuclear fuel and has collapsed to a very small size; such a star is near its final stage of life. White dwarfs eventually become black dwarfs ...
... After becoming a planetary nebula, the remains of the core of the star become a white dwarf. A white dwarf is a star that has exhausted most or all of its nuclear fuel and has collapsed to a very small size; such a star is near its final stage of life. White dwarfs eventually become black dwarfs ...
Dim Stars - granthamkuehl
... of sizes and masses. Our Sun is a mediumsized star. The largest stars, giant stars have a mass of about 60 times the mass of the Sun. ...
... of sizes and masses. Our Sun is a mediumsized star. The largest stars, giant stars have a mass of about 60 times the mass of the Sun. ...
Stars
... size, temperature, and distance from the observer. The hotter the star, the brighter its color. Blue and white stars are the brightest and hottest stars. Red stars are the dimmest and coolest. ...
... size, temperature, and distance from the observer. The hotter the star, the brighter its color. Blue and white stars are the brightest and hottest stars. Red stars are the dimmest and coolest. ...
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.