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astrophysics

Space

The hidden pockets of the universe where the future can cause the past

Inside some very special black holes, there may be a boundary called a Cauchy horizon. Columnist Leah Crane explores the place beyond which physics breaks and anything is possible

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Space

Black hole stars really do exist in the early universe

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Space

A distant galaxy is being strangled by the cosmic web

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Space

Is the expansion of the universe slowing down?

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CMB-S4 will use telescopes installed at the South Pole to measure variations in the temperature and polarization of microwave light across most of the sky to probe for ripples in space-time. Shown here is the South Pole Telescope. Photo: Brad Benson, University of Chicago, Fermilab

Space

The end of US support for the CMB-S4 telescope is devastating

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Physics

Quantum-inspired algorithm could help reveal hidden cosmic objects

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Space

There is an odd streak in the universe – and we still don’t know why

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A bright star emitting streaks of light that curve outwards as the star moves across the night sky

Space

How faster-than-light explosions could reveal the universe’s secrets

Features

Space

Gravitational waves finally prove Stephen Hawking's black hole theorem

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Physics

Oddly viscous stars could be impersonating black holes

Calculations suggest stars that are very viscous could reflect gravitational waves and produce signals very similar to those produced by black holes

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Space

How we could explore a black hole with an interstellar nanocraft

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Space

We may have finally solved an ultra-high-energy cosmic ray puzzle

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Physics

How nothing could destroy the universe

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Physics

How does astronomy fit into astrophysics – and does it matter?

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