
The violent head-on-collision of two galaxies some 180 million light-years away from Earth appears to one of the world's most powerful telescopes like a deceptively serene cosmic butterfly flapping its wings, or a giant piece of candy

The violent head-on-collision of two galaxies some 180 million light-years away from Earth appears to one of the world's most powerful telescopes like a deceptively serene cosmic butterfly flapping its wings, or a giant piece of candy