Researchers analyzing telescope data found a stable star flickering wildly, suggesting two planets collided in its system.
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Astronomer Anastasios Tzanidakis discovered unusual behavior in star Gaia20ehk while reviewing 2020 telescope observations. The main sequence star, located 11,000 light-years from Earth near constellation Puppis, began flickering erratically despite being a stable, sun-like star that should emit steady light.
Planetary collisions are extremely rare cosmic events that astronomers have long theorized but rarely observed directly. When planets collide, they create massive debris clouds and energy releases that can cause temporary changes in nearby stellar light patterns. This discovery provides crucial evidence for understanding how planetary systems evolve.
The star Gaia20ehk shares characteristics with our sun as a main sequence star, making its sudden light variations particularly significant for researchers. Main sequence stars typically maintain consistent luminosity for billions of years. The flickering pattern observed suggests debris from a planetary impact temporarily obscured the star's light.
This finding could help scientists better understand planetary formation and destruction processes in distant solar systems. The research demonstrates how archived astronomical data continues to yield new discoveries years after initial collection. Further observations may reveal additional details about the collision's aftermath and impact on the stellar system.