megastructure

E.T. Or Not E.T.?

How astronomers plan to solve the mystery of the 'alien megastructure star'

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MAGAZINE HIGHLIGHTS

planet-9

To Planet 9 — and Beyond!

Our familiar solar system still hides some of the universe's biggest mysteries.
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Why Nothing Really Matters

Gaping cosmic voids might hold the answers to dark matter, dark energy and the very foundations of the universe.
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The Last Soviet Citizen

Cosmonaut Sergei Krikalev witnessed his country's collapse from space and set a rocky course for international collaboration.
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