A giant wave in the Milky Way may have been created by another galaxy

Astronomers have identified patterns within the motion of stars stretching across the Milky Way, hinting at the presence of a vast wave

​Astronomers have identified patterns within the motion of stars stretching across the Milky Way, hinting at the presence of a vast wave Astronomers have identified patterns within the motion of stars stretching across the Milky Way, hinting at the presence of a vast wave