Bennu: The 6-Year Asteroid Visitor Revealing Life’s Origins

Six years from now, Earthlings will gaze skyward as Bennu returns, the ancient asteroid grazing our orbit at moon-like proximity. NASA’s OSIRIS-REx brought back its bounty in 2023—121.6 grams unlocking solar system’s dawn.

Packed with life’s precursors—organics, amino acids, nucleobases, sugars, phosphates—this 500m rock whispers of watery worlds past, evidenced by salts. Supernova dust and gum-like goo mark its explosive heritage. Far older than most, it coalesced in the asteroid belt before drifting near.

A 9-year-old named it after mythology; it spins tilted, orbits swiftly. Rugged boulders and fissures mar its face, a shock to observers. Extreme conditions bar life, but its cargo hints at panspermia, seeding Earth.

These insights reshape astrobiology, showing chemistry primed for biology everywhere early on. Bennu’s periodic visits keep the wonder alive.