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22 Cards in this Set
- Front
- Back
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STAR |
It is a bright object that gives off light by energy produced in its core.
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STAR |
It is a great ball of gas formed mostly from elements hydrogen which is converted to helium through a thermonuclear reaction called fusion.
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FUSION |
It is a thermonuclear reaction when hydrogen is converted to helium. |
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1. PLANETS 2. DWARF PLANETS 3. ASTEROIDS |
May be confused as stars. |
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1. LUMINOSITY 2. COLOR and TEMPERATURE |
Characteristics of stars. |
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SPECTRUM |
an arrangement of electromagnetic radiation placed in order of wavelength
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SPECTRAL LINES |
barcode-like linked to a specific item.
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SPECTROSCOPY |
the use of unique patterns of spectral lines to identify a chemical substance.
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RED |
coolest |
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BLUE |
hottest |
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LIGHT YEAR |
Distance travelled by light (300,000km/s) for a period of one year
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8 TRILLION KILOMETERS IN ONE YEAR |
Light travels about ________________ another unit
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APPARENT MAGNITUDE |
refers to the brightness of a star as soon as it appears to us.
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ABSOLUTE MAGNITUDE |
refers to the actual brightness given off by a star.
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FREE FALL |
anything acted upon gravity
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SPECTROSCOPY |
It is the study of the spectra of stars. |
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PHOTOSPHERE |
Layer of the star that has a visible surface. This is where light comes from. |
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STELLAR SPECTRA |
These are predominantly patterns of dark lines crossing a continuous band of colors. These identify the chemical elements that make up the star's atmosphere. |
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FRAUNHOFER LINES |
Discovered by Joseph Von Fraunhofer. These are the sun's strongest dark lines. |
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HYDROGEN |
Most abundant element in the stars. |
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70% HYDROGEN 28% HELIUM 2% OTHER ELEMENTS |
Chemical composition of the sun. |
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ABSORPTION SPECTRA |
Used to classify stars into seven principal types called spectral classes. |
