Bennu Spits Back: The Little Asteroid That Throws Stones
Category: Outer Space 18th May 2026
Sweetheart, when I say Bennu has attitude, I mean literal attitude: this peanut-shaped rock off in space has been caught spitting particles into space, and the pictures make it look like a grumpy old neighbor flicking cigarette butts out his window. The OSIRIS-REx spacecraft, minding its own business, watched the asteroid eject tiny grains and pebbles - some floated away, some fell back like a bad date, and some hung around in orbit for a while.
Bennu is not a solid rock you could carve a name into; it's a rubble pile, a mashed-up heap of gravel and dust held together by gravity and a whisper of cohesion. In 2019 and afterward, OSIRIS-REx recorded dozens of particle-ejection events. The bits ranged from dust grains to pebbles a few centimeters across. Scientists actually tracked some being launched, sailing around Bennu, and then slamming back down - like cosmic porch-sitters who forgot the party was over.
Now don't go picturing a volcano belching rocks. Nobody's claiming Bennu sneezed molten lava. The clever folk at NASA offered a buffet of likely causes: meteoroid impacts, thermal cracking from Bennu's brutal day-night temperature swings, or the release of trapped volatile materials. The truth is, the team says, it might be one of those, or a cocktail. Space likes to be mysterious; so do I, but I prefer my mysteries with a meatball sub.
Why does any of this matter besides being gloriously weird? For one, if asteroids are actively shedding material, it changes how we think they evolve and how safe they are if they pass near Earth. Also, OSIRIS-REx came home with a sample - part of planet defense and pure science - and Bennu's spitting ways could tell us about how planets, and even life-friendly ingredients, move around in the solar system.
So the next time someone tells you space is tidy and polite, laugh and tell 'em about Bennu: a neighborhood pebble with the gall to fling rocks, remind us nature isn't neat, and give old gossip columnists like me something juicy to chew on. And between you and me, I've been flicked at by worse - but never by a space rock.