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Why sending messages to extraterrestrials is controversial

Space

Why sending messages to extraterrestrials is controversial

If there are intelligent aliens out there, should we try to get in touch with them? And who should speak for Earth, asks professor of astronomy Chris Impey

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Supermassive black hole. Elements of this image furnished by NASA.; Shutterstock ID 1756053335; purchase_order: -; job: -; client: -; other: -

Space

Lab imitations of the unobservable cosmos can be genuinely insightful

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Milky Way. Night sky and silhouette of a standing man

Space

Questions I dread: How did the universe begin, and what is space-time?

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CE8NB6 Illustration showing galaxy giant whirlpool in space galaxy's effect on space image shows how gravity galaxy warps local

Physics

To create a wormhole that doesn't collapse, you need exotic matter

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A dense collection of stars covers the view. Towards the centre the stars become even more dense in a circular region, and also more blue. Around the edges there are some redder foreground stars, and many small stars in the background.

Physics

Why darkness between stars reveals more about the universe than light

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NEW CLOUDS ABOVE US The modern world relies on satellites for its communications and commerce. While mostly invisible to us as we go about out daily lives, our entire modern way of living ? both socially and professionally ? is intimately linked with the orbital space around the Earth. How we treat this extraterrestrial environment will determine how much we can rely on it in the future. ?In this view of Greenwich, London, you?ve got examples of what?s in space. I photographed about 300 artefacts ranging from satellites to rocket bodies, satellite parts, solar panels, all the way down to the screws and a glove to show what?s up there. The photography was done over a one year period, across North America, Europe and the UK. I wanted to show this from a human perspective ? from the ground looking up. I chose Greenwich because of its history of astronomy and because from there you can see the financial district of London to highlight the modern world?s connection to the satellites that circle Earth.? Max Alexander

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Space debris problem highlighted in new series of photographs

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Space

Alien messages responding to NASA signals could reach us by 2029

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Seven galaxies highlighted here in five boxes are part of the most distant galaxy cluster ever found

Space

JWST has spotted the most distant galaxy cluster ever seen

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HA6GE7 departmentofenergy 8056998030 The Daya Bay Antineutrino Detector

Space

What was the universe's first second like? These particles can tell us

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inventory of the universe

Space

Your essential guide to the many breathtaking wonders of the universe

An abridged inventory of everything there is in the universe – from rogue planets and exomoons to supernovae, supermassive black holes and the cosmic web.

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Space

JUICE livestream: Watch the launch of ESA’s mission to Jupiter’s moons

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Space

The JUICE mission to explore Jupiter’s ocean moons is about to launch

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Space

A supermassive black hole is hurtling away from its home galaxy

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Physics

Are there planets that are better for life than Earth?

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