Un adept al „Pământului plat” a încercat sa demonstreze teoria cu un boloboc si un avion.
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Universe

The Universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy. While the spatial size of the entire Universe is unknown, it is possible to measure the size of the observable universe, which is currently estimated to be 93 billion light years in diameter.