December 2016: When galaxies eat each other

This issue of Astronomy covers galaxies becoming cannibals, exploring the impact that killed the dinosaurs, observing colorful open clusters, how moon dust will put a ring around Mars, and beautiful images from astroimagers Rogelio Bernal Andreo.
By | Published: December 20, 2016 | Last updated on May 18, 2023
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Astronomy offers you the most exciting, visually stunning, thorough, and timely coverage of the heavens above. Each monthly issue includes expert science reporting, vivid color photography, complete sky-event coverage, spot-on observing tips, informative equipment reviews, and more. All of this comes in an easy-to-understand user-friendly style that’s perfect for astronomers at any level. Contact Astronomy, the world’s best-selling astronomy magazine, at 262.796.8776 or email