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As researchers analyzed 'Oumuamua, they found that it exhibited bizarre features. Suggestions ranged from it being anywhere between 100 to 1,000 meters long with an unconventional shape reminiscent of a cigar or flat dish. Its brightness fluctuated significantly, likely due to its elongated form, creating a pulsing brightness as it rotated every seven hours. Notably, unlike typical asteroids or comets, it appeared to be tumbling rather than smoothly spinning.
Most perplexing was 'Oumuamua’s acceleration as it neared the Sun; instead of slowing down, it displayed an unexpected burst of speed that contradicted known laws of physics. This baffling behavior prompted various theories regarding its true nature.