(Print) Use this randomly generated list as your call list when playing the game. Place some kind of mark (like an X, a checkmark, a dot, tally mark, etc) on each cell as you announce it, to keep track. You can also cut out each item, place them in a bag and pull words from the bag.
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O-singularity
O-transparent
N-space
N-flat
B-inflation
I-gravity
B-absorption/emission spectra
I-radio
N-hydrogen/helium
I-expanding
G-geocentric
N-gamma
O-astronomical unit
G-cosmic microwave background
I-blue
G-temperature drop
B-visible light
G-cosmic horizon
O-redshift
G-distorts/absorbs
B-eliptical
I-Reflecting
B-
Heliocentric
reflecting
gamma
distorts/absorbs
astronomical unit
elliptical
expanding
flat
cosmic horizon
singularity
inflation
gravity
temperature drop
transparent
absorption/emission spectra
blue
Hydrogen and Helium
Cosmic Microwave