How One Shattered Asteroid Showered Three Planets with Debris ✦
Around 800 million years ago, a big asteroid shattered in space like a glass ball. For ages, its rubble rained down on the Moon, carving out giant craters, including the famous Copernicus. Did this celestial smash-up also leave a mark on Earth’s life?
865 million years ago, a collision shattered a city-sized asteroid. Like a building demolition, boulders flew apart as dust blanketed the area. Under the sun's warmth, the fragments drifted slowly until Jupiter's gravity hurled them toward Earth, the Moon, and Mars.
The bombardment shook Earth: shockwaves released carbon dioxide, disrupting the ocean's carbon cycle and altering marine life. The Moon gained more craters, and volcanoes on Mars stirred to life. Scientists tell the fragments apart by their reflected light (spectroscopy, the Fraunhofer method) and brightness (photometry); they were once mistaken for comets. Traces of that ancient cosmic dust still settle today. And analysis of Bennu revealed amino acids—perhaps such impacts seeded Earth with organic material.
🎯 The Moon’s Copernicus crater was apparently carved by a fragment from the same parent body as asteroid Bennu, samples of which were brought to Earth.
🎬 It’s like the plot of ‘Don’t Look Up,’ but with a finale stretched over millions of years.