The European Space Agency’s XMM-Newton and NASA’s Chandra X-ray space telescopes have spotted the aftermath of three bright explosions echoing through the outer spiral arms of our galaxy, the Milky ...
X-ray echoes from distant blasts reveal the Milky Way's outer spiral arms are up to 10% farther away than previous maps suggested. An artist’s impression of what our home galaxy, the Milky Way, might ...