This bingo card has a free space and 29 words: Ellipse, Earth, Circle, 11.18 years, Kepler, Away, Towards, Oval, Red, Blue, Foci, Aphelion, Perihelion, Mars, Mercury, Sun's Gravity, Period, Eccentricity, Big Bang, Venus, Hubble, CMB (cosmic microwave background), 8 years, 210 km/s, 21 km/s, 2.8 years, 1 year, distance and 2.5 AU.
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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.
Tip: If you want your game to last longer (on average), add more unique words/images to it.