Why sending messages to extraterrestrials is controversial
24 May 2023
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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We need a new model of space governance to address today's challenges
25 January 2023
Access to space is growing, with more than 70 nations now operating space programmes. We urgently need to update international rules, says chair of the UAE Space Agency Sarah Al Amiri
The eternal debate about the eternal inflation of the universe
21 July 2021
The idea that the universe is continually inflating isn’t confirmed – but there are still some misconceptions about it, writes Chanda Prescod-Weinstein
We may have to rewrite our understanding of gravity
3 March 2021
There is a mismatch between two ways of measuring galactic mass. Dark matter is one way to solve it, but so is rewriting the laws of gravity, says Chanda Prescod-Weinstein
How every galaxy comes from quantum fluctuations billions of years ago
6 January 2021
All the galaxies in the universe started out in a similar way, but the forms they now take are incredibly diverse, writes Chanda Prescod-Weinstein
Does a halo of mysterious dark matter swirl around every galaxy?
2 December 2020
Many galaxies seem to have bubbles of dark matter enveloping them, but finding out if every galaxy is like this is an ongoing area of research, writes Chanda Prescod-Weinstein
Why the vast emptiness of space isn't really that empty after all
4 November 2020
Space-time may seem empty, but the expanse between stars is filled with more interesting stuff than you may think, writes Chanda Prescod-Weinstein
It’s time to for us to revisit Venus to uncover its many mysteries
18 September 2020
The discovery of a possible sign of life on Venus highlights our ignorance of what is going on within its swirling clouds and on its furnace-like surface. It’s time to go there and find some answers, writes Peter Gao
Why dark matter should be called something else
12 August 2020
There are many things that we don't understand about dark matter, but whether it is actually dark isn't one of them, writes Chanda Prescod-Weinstein
Elements from the universe’s earliest stars gave birth to our sun
15 July 2020
It is easy to regard the sun as humdrum, yet it contains elements blasted from the universe’s first stars as they died and is halfway through its 9-billion-year lifespan
