Cosmic collision in our neighbourhood changed galaxies
Toronto, September 05: Andromeda and Triangulum, the two galaxies closest to our own, collided two to three billion years ago, changing the galactic structure, according to evidence unearthed by astronomers.
The collision appears to have plucked millions of stars from the Triangulum disk to form a faint stream visible in the Pan-Andromeda Archaeological Survey (PAndAS) data, says Larry Widrow, professor of physics and Astronomy at Queen’s University.