A dramatic collision between the Milky Way and a dwarf galaxy around 10 billion years ago may have completely changed the orientation of our galaxy, according to astronomers.

It's easy to think of our home galaxy as a relatively stable place, a neatly ordered disk sailing serenely through space like a frisbee – but it may be a lot more turbulent than…

While the Milky Way galaxy might look calm and stable today, scientists say a grand display of cosmic gymnastics once turned our world upside down.