From another star, a football‑field‑long object flew past the Sun—then sped up with no comet tail, prompting Harvard’s Avi Loeb to float a light sail. Called 'Oumuamua, this dark reddish, cigar‑or‑pancake‑shaped visitor was tracked ~3 weeks before fading beyond Neptune at 58,000 mph toward Pegasus; scientists debate invisible outgassing (hydrogen/nitrogen ice) vs tech as we prep to intercept the next interstellar object.