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Deep Space

Double-world discovery could solve ‘puffy planet’ mystery

Since astronomers first measured the size of an extrasolar planet 17 years ago, they have struggled to answer the question: how did the largest planets get to be so large?

News

Earth-based telescope unlocks secrets of brightest galaxy in the universe

The Atacama Large Millimeter/submillimeter Array (ALMA) has got a closer look at the most luminous structure in the cosmos

Solar System

Video: Evolution of the Moon

Learn the violent and turbulent history of our largest natural satellite in this video.

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