Our home galaxy, the Milky Way, is a magnificent spiral galaxy with a disc of stars spanning over 100,000 light-years, according to NASA reports. Earth is located within one of its spiral arms, about ...

Our Milky Way is far from calm — it ripples with a colossal wave spanning tens of thousands of light-years, revealed by ESA’s Gaia telescope. This wave, moving through the galaxy’s disc like ripples ...