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Cards In This Set
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Why are the hydrogen balmer lines weak in O type stars?
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The hydrogen in these stars is mostly ionized.
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From the spectrum of a star we can learn about its . . .
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Chemistry, temperature, motions, spectral type.
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What is the order of stellar spectral classes from hottest to coolest?
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OBAFGKM.
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How is a star's surface temperature determined?
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Color.
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What are the key components of an atom?
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Electron, proton, neutron, nucleus.
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Cooler gas in front of a continuous source results in what kind of a spectrum?
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An absorption.
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What would an atom be not electrically neutral?
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It has too many or too few electrons to match the number of protons.
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A set of two or more atoms being held together by sharing electrons is called what?
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A molecule.
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A photon of red light as the same _____ as a photon of blue light.
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Speed.
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Which is cooler a K9 or K0 star?
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K9.
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How does the radiation of an atom come out?
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At a few specific wavelengths.
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A very hot body that is solid or DENSE gas radiates what kind of spectrum?
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Continuous.
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What component of an atom has a positive charge?
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A proton.
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What are two solar phenomena that are the same thing but are just viewed at different angles?
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Filaments and prominences.
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What have astronomers built huge underground instruments to detect for?
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Neutrinos.
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