6 trends tracked about this subject — the full history, oldest to newest below.
NASA's Chandra X-ray Observatory has unveiled a new gallery titled "Galactic Gems," showcasing 16 distant galaxies in high-detail X-ray views.
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XMM-Newton and Chandra reveal the Milky Way’s outer arms are about 10% farther, expanding the galaxy’s known size
NASA unveils red, white and blue cosmic images to mark America’s 250th birthday on July 4.
NASA's Chandra observatory has detected mysterious, flickering x-ray signals emanating from the ruins of dead stars 15 million light-years away.
15 news sources are covering this Science story right now — PULSE is tracking how fast it spreads.