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59 Cards in this Set
- Front
- Back
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Stellar parallax |
Change in the position of a star carved by the change in the location of the observes |
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Seconds of arc |
1/60 acc minute- 1/60 / 60=1 arc second: 1/3600 acc second |
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Parsec |
A larger measurement of distance. It's 3.26 light years |
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Electromagnetic radiation |
Radiation including visible light, radio waves, gamma rays and x-rays in which electric and magnetic fields vary simultaneously |
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Electromagnetic radiation |
Radiation including visible light, radio waves, gamma rays and x-rays in which electric and magnetic fields vary simultaneously |
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Visible light |
What we can see, between infrared and ultraviolet |
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Infrared |
Emitted more by heated objects. Greater wavelength then the red end of the visible light spectrum but less then that of a microwave |
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Ultraviolet |
Has a wavelength shorter then the violet end of the visible spectrum but longer then x-rays |
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Ultraviolet |
Has a wavelength shorter then the violet end of the visible spectrum but longer then x-rays |
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Frequency |
Rate of which a vibration occurs in either a material or a electromagnetic field |
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Ultraviolet |
Has a wavelength shorter then the violet end of the visible spectrum but longer then x-rays |
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Frequency |
Rate of which a vibration occurs in either a material or a electromagnetic field |
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Spectroscopy |
Looks at spectrum given off by an object |
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Ultraviolet |
Has a wavelength shorter then the violet end of the visible spectrum but longer then x-rays |
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Frequency |
Rate of which a vibration occurs in either a material or a electromagnetic field |
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Spectroscopy |
Looks at spectrum given off by an object |
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Absorption spectra |
Spectrum of electromagnetic radiation transmitted through a substance showing dark lines or bands due to the absorption of specific wavelengths |
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Ultraviolet |
Has a wavelength shorter then the violet end of the visible spectrum but longer then x-rays |
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Frequency |
Rate of which a vibration occurs in either a material or a electromagnetic field |
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Spectroscopy |
Looks at spectrum given off by an object |
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Absorption spectra |
Spectrum of electromagnetic radiation transmitted through a substance showing dark lines or bands due to the absorption of specific wavelengths |
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Emission spectra |
Spectrum of electromagnetic radiation emitted by a source |
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Blueshift |
When the star is moving towards us |
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Red dwarf |
Lower right, cool, dim, red, there is a lot of them |
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Brown dwarf |
Not on H-R diagram, does not have enough mass, does not produce nuclear fusion |
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Absolute magnitude |
The amount of light given off by a star |
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Astrometric binary |
Only see one star but the other is smaller (wobble) |
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Spectroscopic binary |
Doppler shift |
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Doppler shift |
The apparent change in the frequency of a wave caused by relative motion between the source of the wave and the object |
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Optical dpuble |
Stars that appear binary (close to each other) but aren't |
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Luminosity |
Actual light given off by a star (absolute magnitude) |
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Apparent magnitude |
How bright a star appears to us |
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Absolute magnitude |
The amount of radiation given off by a star (luminosity) |
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Blue giant |
Upper left, hot, bright, blue, not very many |
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H-R diagram |
All stars in our galactic neighborhood (near us) |
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Main sequence |
Where most stars are located, position is determined by mass |
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Red giant |
Upper right, cool, bright, red, HUGE |
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Binary star |
Two stars moving around a central point |
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White dwarf |
Lower middle left, hottish, dim |
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Ultraviolet |
Has a wavelength shorter then the violet end of the visible spectrum but longer then x-rays |
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Frequency |
Rate of which a vibration occurs in either a material or a electromagnetic field |
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Spectroscopy |
Looks at spectrum given off by an object |
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Absorption spectra |
Spectrum of electromagnetic radiation transmitted through a substance showing dark lines or bands due to the absorption of specific wavelengths |
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Emission spectra |
Spectrum of electromagnetic radiation emitted by a source |
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Binding energy |
The energy you have to give an electron to make it jump a level |
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Ground state |
Where the electron normally is |
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Ground state |
Where the electron normally is |
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Excited state |
Where the electron goes when it gets to much energy |
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Ground state |
Where the electron normally is |
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Excited state |
Where the electron goes when it gets to much energy |
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Photon |
Pulses of energy |
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Spectral classes |
(Hottest/ ionized) O B A F G K M (coolest/ compounds) |
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Space velocity |
How stars move |
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Radial motion |
Moving toward or away from me |
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Radial motion |
Moving toward or away from me |
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Proper motion |
Move right or left |
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Radial motion |
Moving toward or away |
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Redshift |
(Radial motion) when the star is moving away from us |
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Visible binary |
Any binary star that can be seen from earth |
