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 ...
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How to measure distances in the night sky using nothing but your hand. (Image credit: Created in Canva Pro) Next, look to the upper right of Altair to find Vega — the fifth brightest star in the night ...
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