HD 172555

HD 172555 is a star of spectral type A5 V, which is slightly more than 90 light -years from Earth in the direction of the constellation peacock.

Spectral analyzes suggest that there has been a collision between two planets the star recently, the smaller of the two was destroyed. This was about the size of Earth's moon, the other about the size of Mercury. The detection of the collision managed by NASA with the Spitzer Space Telescope in the evaluation of the picture already made ​​2004.