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Stellar Spectra
Stellar Evolution
Star Properties
100
A hot glowing body such as the sun or a metal filament produces this type of spectrum
What is a continuous spectrum?
100
All stars begin their lives inside this.
What is a nebula, a huge cloud of gas and dust?
100
A star's brightness as seen from earth is called this.
What is apparent magnitude?
200
Emission lines in spectra come from this phenomenon
What are electrons releasing absorbed energy as they fall back down into their ground state positions or lower energy levels.
200
Once a star gets hot enough to fuse Hydrogen into Helium it becomes this
What is a main stream star?
200
The hotter the star, the ________ the color.
What is bluer.
300
If the emission lines from an element in a star are shorter than they are here on earth, the spectrum is _______ shifted.
What is blue?
300
This determines the evolutionary track of a star.
What is its mass?
300
Very hot stars have __________ peak wavelengths.
What is short?
400
If all of the emission lines from an element in a star are longer than they are here on earth, the star is likely moving ___________ from us.
What is further away?
400
Once a highest mass stars use up all of their fuel they explode as ____________ and become _______________.
What are supernovae and black holes?
400
What force is responsible for creating stars?
What is gravity?
500
One star is more red-shifted than other. This could be the reason.
What is it is further away or it is moving away faster.
500
The fusion of which element in the core of a star triggers its demise?
What is iron, Fe?
500
The diagram relating temperature and luminosity of a star is called this
What is an H-R diagram?