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two maps of heat maps of twin plants side by side

Space

Mistaken brown dwarf is actually two planets orbiting each other

New observations reveal a rare binary planet system made of two gas giants four times as massive as Jupiter that likely formed in the breakup of a protostar 10 million years ago

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Jupiter

Space

How Jupiter split the asteroid belt in two shows its great age

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Saturn’s moons could reassemble after a cosmic smash-up

Space

Saturn’s moons could reassemble after a cosmic smash-up

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Diagram of the shape of a synestia – like a red blood cell or a doughnut

Space

Huge impact could have smashed early Earth into a doughnut shape

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Zircon mineral grains

Earth

Early Earth was covered in a global ocean and had no mountains

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Protoplanetary disc around young star TW Hydrae.

Space

Earth may have been born in a huge flare-up of the young sun

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Mars and asteroids

Space

Mars Trojans may be part of a planet that was destroyed long ago

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meteorite artwork

Earth

Rocks of ages: How meteorites reveal the solar system's history

Features

Space

Distant DeeDee could be a new dwarf planet

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Mars

Space

Mars is so small because Jupiter shook up its formation

Models suggest Mars should be up to twice the mass of Earth, but it’s only one-tenth that, and Jupiter’s effects on the nascent solar system could be to blame

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Space

NASA orbiter shows Mars lost 90 per cent of its CO₂ to space

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Space

Pluto is still an ex-planet, no matter what its fans think

Comment

Space

Magnetic meteorites narrow down solar system’s birthdate

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Earth

Planet Earth makes its own water from scratch deep in the mantle

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