Dust blocks light from Sun-like star as far-off worlds meet
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Data on infrared radiation and the dimming of the host star's light led researchers to conclude they may have witnessed planets between the size of Earth and Neptune smashing into each other while circling the distant stellar orb. "These observations are consistent with a collision between two exoplanets of several to tens of Earth masses… Such an impact produces a hot, highly extended post-impact remnant with sufficient luminosity to explain the infrared observations. Transit of the impact debris, sheared by orbital motion into a long cloud, causes the subsequent complex eclipse of the host star," says
Researchers could also rule out comparisons with our solar system's late heavy bombardment phase, in which the inner planetary system was subjected to a spate of asteroid impacts.
Belgique Dernières Nouvelles, Belgique Actualités
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