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Front page of The Sun newspaper, headlined 'World's end'

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Ease up doom mongers, Planet Nine is not about to destroy us

Contrary to tabloid tales, a distant extra planet in our solar system is not about to send comets raining down on us, says astronomer Phil Plait

The Pleiades star cluster: it might have been the sun's nursery

Space

Planet Nine might be an exoplanet stolen by the sun

A hypothetical view of Planet Nine

Space

More evidence for Planet Nine as odd celestial alignment emerges

Mercury in false colour, imaged by the Messenger probe

Space

Mercury once had a graphite crust floating on a sea of magma

Artist's impression of planet nine

Space

Planet Nine hunters enlist big bang telescopes and Saturn probe

A desert, with a few stones and dry branches in the foreground and a very bright sun shining in a clear, dark blue sky

Earth

Planets with too much carbon dioxide could lose oceans to space

Earth

Why do people believe Earth is flat in the 21st century?

Space

Lonely exoplanet orbits its star at greatest distance yet seen

Earth

How Planet Nine may have been exiled to solar system’s edge

Space

Hints that ‘Planet Nine’ may exist on edge of our solar system

An unusual alignment between the orbits of six small bodies in the Kuiper belt suggests there is an undiscovered planet 10 times the mass of Earth

Space

Is Pluto no bigger than the moon?

Space

Crater count led Mars historians astray

Space

Robot finds life in a Mars-like desert

Space

Save the planet