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Space

Search for radio signals finds no hint of alien civilisation on K2-18b

Planet K2-18b, an apparent water world 124 light years away, has been seen as a promising location in the search for aliens, but telescopes on Earth failed to pick up any radio transmissions

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Space

Weird inside-out planet system may have formed one world at a time

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composite picture of Mars

Space

Mars's gravity may help control Earth’s cycle of ice ages

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Our solar system is extremely weird: Best ideas of the century

Space

Our solar system is extremely weird: Best ideas of the century

Features

Formation of a ring around an extrasolar planet (artist's impression)

Technology

Quantum computers could help sharpen images of exoplanets

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Tauri d compared to Earth

Space

Super-low-density worlds reveal how common planetary systems form

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Space

Rare exoplanet alignment set for 2026 – but we are likely to miss it

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Artist's impression of a free-floating-planet

Space

Rare Saturn-sized rogue planet is first to have its mass measured

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The essential guide to proving we’ve found alien life

Space

The essential guide to proving we’ve found alien life

Features

Space

Hopes of finding aliens were raised in 2025 – but quickly faded

Astronomers thought they had seen the "first hints of life on an alien world" this year, but they disappeared under closer scrutiny

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Space

Two asteroids crashed around a nearby star, solving a cosmic mystery

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Space

Strange lemon-shaped exoplanet defies the rules of planet formation

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Space

General relativity might save some planets from death

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Space

A planet the size of Saturn could orbit the nearest sun-like star

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