Tags: Star.
HD 172555 is a white-hot A5V star located relatively close by 95 light years from Earth in the direction of the constellation Pavo. Spectrographic evidence indicates a relatively recent collision between two planet-sized bodies that destroyed the smaller of the two which had been at least the size of Earth’s moon and severely damaged the larger one which was at least the size of Mercury. Evidence of the collision was detected by NASA’s Spitzer Space Telescope.
