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cosmology

brain artwork

Health

To advance science we need to think about the impossible

Science sets out what we think is true – but when it gets stuck, it’s time to explore what we think isn’t

Leader

telescope 1

Technology

How to dust a telescope’s 78-square-metre mirror with CO2

Regulars

light

Physics

Cosmic uncertainty: Is the speed of light really constant?

Features

Boltzmann brains

Physics

Universes that spawn 'cosmic brains' should go on the scrapheap

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Globular cluster 47 Tucanae

Space

Rare mid-weight black hole found at heart of bright star cluster

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Hologram

Space

Have we found evidence that we live in a holographic universe?

Comment

A meteorite from the Sahara

Earth

Earth’s water must have arrived here earlier than we thought

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galaxies

Space

First evidence of dwarf galaxy merger boosts two cosmic theories

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Artists rendition of a binary star with a disc of dust around it

Space

Binary stars shred up and shove off their newborn planets

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One spherical object being ejected by a larger one

Space

Milky Way's core could be spewing out planet-sized star chunks

The supermassive black hole at the galaxy's heart can stretch and shred stars that approach – then fling the shreds away as spheres as small as Neptune

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Space

Cosmic radio bursts tracked to home galaxy for first time

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Space

First test of rival to Einstein's gravity kills off dark matter

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Space

Galaxy's rapid growth spurt may have spawned 3000 suns per year

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Space

Dark matter that talks to itself could explain galaxy mystery

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