This bingo card has a free space and 25 words: Geocentric, Heliocentric, sol, reflecting, EM spectrum, radio, gamma, distorts/absorbs, astronomical unit, elliptical, perihelion, aphelion, transit of venus, milky way, andromeda, orion, pisces-cetus, Virgo, expanding, flat, 4%, Sagittarius A, positively curved, cosmic horizon and light year.
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With players vying for a you'll have to call about __ items before someone wins. There's a __% chance that a lucky player would win after calling __ items.
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