Scientists Say Galactic Wobble , Offers Glimpse at Ancient , Cosmic Collisions.<br />Scientists have found that the entire <br />Milky Way galaxy is rippling like <br />a pond disturbed by a large stone.<br />The Byte reports that the pond represents <br />our home galaxy, while the stone is our nearest <br />galactic neighbor, the Sagittarius dwarf galaxy. .<br />According to a new study published in the journal <br />of the 'Royal Astronomical Society,' the ancient <br />wobbling may shed light on our galaxy's distant past.<br />The wobble astronomers are now <br />observing is the result of a cosmic <br />collision that occurred eons ago.<br />We can see that these stars <br />wobble and move up and down <br />at different speeds, Paul McMillan, co-author and astronomer <br />at Sweden's Lund University, via The Byte.<br />A team of international researchers utilized data from <br />the European Space Agency's Gaia space observatory <br />to track and compare over 20 million Milky Way stars.<br />A team of international researchers utilized data from <br />the European Space Agency's Gaia space observatory <br />to track and compare over 20 million Milky Way stars.<br />The Byte reports that the process <br />known as "galactic seismology" was <br />used to generate models of the ripples. .<br />The team's results suggest that the Milky Way <br />and Sagittarius galaxies have collided multiple <br />times throughout the history of the universe.<br />The team's results suggest that the Milky Way <br />and Sagittarius galaxies have collided multiple <br />times throughout the history of the universe.<br />Researchers trace the likely <br />time of the last Sagittarius collision <br />to hundreds of millions of years ago.<br />An understanding of previous Sagittarius <br />collisions may allow scientists <br />to predict likely future collisions
