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Space

Is the universe really one big black hole?

According to the equations that govern black holes, the larger one of these cosmic behemoths is the lower its average density – given that the universe contains a lot of relatively empty space, could the whole cosmos be a black hole?

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Do black holes exist and, if not, what have we really been looking at?

Space

Do black holes exist and, if not, what have we really been looking at?

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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

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Geometric 3d render shower of decorative starry short lines. Digital waterfall made futuristic straight shapes with random repetition. Tears outer space falling in rays bright stars.; Shutterstock ID 1952851798; purchase_order: -; job: -; client: -; other: -

Physics

Should it be space-time or spacetime – and why does it matter anyway?

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NASA Astronaut John Glenn inside a vacuum chamber

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Inside the missions that made the moon landings possible

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John Glenn during the fiery re-entry, holding steadfast, believing his heatshield had come loose and he may burn up in the atmosphere - the capsule is illuminated in orange light due to intense heat.

Space

NASA's first space photos restored in stunning detail

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Lunar Crater Radio Telescope: Illuminating the Cosmic Dark Ages This illustration depicts a conceptual Lunar Crater Radio Telescope on the Moon?s far side. The early-stage concept is being studied under grant funding from the NASA Innovative Advanced Concepts program but is not a NASA mission. Credit: Vladimir Vustyansky

Space

Could a huge lunar telescope be our best chance of spotting aliens?

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The northern lights, or aurora borealis, in the UK in 2024

Space

Why auroras are so much brighter and more easily visible recently

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Space

CPR in space could be made easier by chest compression machines

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Space

New moon discovered orbiting Uranus is its smallest one

The James Webb Space Telescope has discovered a new moon that is small and dim in orbit around Uranus. The discovery brings the planet's total to 29, and scientists say there are probably more to be found

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Physics

Jupiter's moon Ganymede could be a giant dark matter detector

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Space

6 of the most fascinating moments in the life of our solar system

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Space

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

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Physics

What happens to light's energy when it redshifts? It's complicated

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