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10 cards from this deck
Science exploring universe beyond Earth's atmosphere
Celestial object producing own light & heat via nuclear fusion
Orbits star, round shape, cleared orbital region
Dusty snowball made of ice and dust
Always points away from the Sun
The 'glue' of the universe; force of attraction
Earth at centre, proposed by Ptolemy
Sun at centre, proposed by Copernicus
About 14 billion years ago
Cosmic radiation, expanding universe, distant galaxies
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