Radio Universe: How to Explore Space Without Leaving Earth

by Emma Chapman

How do you explore distant stars, buried water on Mars or the first moments after the Big Bang - without leaving your back garden?

In The Radio Universe, award-winning astrophysicist Emma Chapman takes us on an electrifying voyage through the cosmos using one of the most powerful, yet overlooked, tools in the radio wave. With dazzling clarity and humour, Chapman reveals how these invisible messengers glide through space, bounce off planets, tunnel through clouds and slip past galactic dust - carrying secrets of the universe that no other kind of light can uncover.

We follow a single radio wave as it escapes Earth and travels outward - ricocheting off the Moon, tunnelling through Venus's furnace-thick atmosphere, tracing ancient ice hidden in Mercury's shadows and diving deep into the swirling arms of the Milky Way. Along the way, we meet black holes that roar louder than stars, pulsars more precise than atomic clocks and galaxies lit by the very first starlight. We explore volcanic pancake planets, death-defying neutron stars, the eerie possibility of alien broadcasts - and the fragile question of our own future in the cosmos.

A celebration of human ingenuity and cosmic curiosity, The Radio Universe reveals that the true frontier of space isn't 'out there' - it's humming quietly all around us, waiting to be heard.

Genres: Science, Nonfiction

332 pages, Kindle Edition

First published March 10, 2026

About the author

Emma Chapman is a Royal Society research fellow and fellow of the Royal Astronomical Society, based at Imperial College London. She is among the world's leading researchers in search of the first stars to exist in our Universe, 13 billion years ago, and she is involved in both the Low Frequency Array (LOFAR) in the Netherlands and the forthcoming Square Kilometre Array (SKA) in Australia, a telescope that will eventually consist of a million antennas pointing skywards in the desert.

Emma has been the recipient of multiple commendations and prizes, the most recent of which was both the 2018 Royal Society Dorothy Hodgkin Research Fellowship and STFC Ernest Rutherford Fellowship, two of the most prestigious science fellowships in the UK. She won the Institute of Physics Jocelyn Bell Burnell Prize in 2014, and was runner-up for the UK L'Oreal Women in Science award in 2017. In 2018 she was also the recipient of the Royal Society Athena Medal.

Emma is a respected public commentator on astrophysical matters, contributing to the Guardian, appearing on BBC radio and regularly speaking at public events. Among others, she has spoken at Cheltenham Science Festival, the European Open Science Forum and at New Scientist Live.

Reviews

[Hannah · Rating 3 out of 5]

It had a lot of interesting information, I particularly enjoyed the chapters on dark matter and energy and the early universe. I did find the way it was written didn't necessarily appeal to me, especially with how many analogies etc there were. I also really wish there had been images and diagrams included.

[Debby Binns · Rating 4 out of 5]

I listened to the abridged version of this book on BBC Radio 4. It was excellent and full of fantastic little facts that I really didn't know. The book is about the power of radio astronomy and the study of the universe through the detection and analysis of radio waves.

[Francis Pellow · Rating 4 out of 5]

very interesting radio 4 book of the week abridgement

[Tim Jones · Rating 5 out of 5]

I loved this book. Dr Chapman shares her passion and enthusiasm for radio astronomy with a clear joy and lightness of touch in an areathat might otherwise be overly technical and off-putting. What surprised me the most is that radio astronomy is not 'something this happened in the 1950s' but a living thing - it has grown to be an equal partner to its more attention-grabbing visual counterpart. This book is for anyone interested in the past, present, or future of science, and the determined and idiosyncratic humans who make that science.

[Rob Thompson · Rating 4 out of 5]

The Echoing Universe by Dr. Emma Chapman — ★★★★☆
Reading this feels like stepping into a quiet observatory at night—calm, expansive, and full of wonder. Chapman writes with a clarity that makes radio astronomy feel accessible without sanding off its complexity. The pacing is steady and measured, more contemplative than breathless, and the emotional impact comes from the sense of scale: the invisible cosmos suddenly feels intimate.

The book shines when Chapman connects scientific discovery to human curiosity. Her explanations of how radio waves reveal what optical telescopes can’t are especially strong—clear, grounded, and genuinely awe-inducing. If there’s a limitation, it’s that the prose occasionally drifts into textbook territory, but never for long.

Best for: Curious readers who enjoy science writing that’s both informative and quietly poetic.

[Maggie Lieu · Rating 5 out of 5]

Even as a well seasoned astrophysicist, i was able to learn a few new facts about our universe!

[Donna Holland · Rating 4 out of 5]

Very enjoyable ,accessible read about one of the most powerful,yet overlooked,tools in science:the radio wave . My favourite part was learning about Karl Jansky who in 1928 got annoyed at the hiss in his headphones.What he then did opened a line of communication for astronomers,far beyond the confines of visible light .
I have learnt that radio waves can pierce the thick atmosphere of Venus ,uncover underground lakes beneath the Martian surface and peer through the Milky Way to the spiral arms beyond.
Highly recommend.

[Morts.]

4.25*

BBC abridged version

[Elisa · Rating 4 out of 5]

This is an eye-opening read (or should it be ear-popping?) If you know what Venus looks like under all the cloud cover, you can thank Radio Astronomy. This field also taught us how our neighbors rotate, or where to find water on the Moon or Mars. And this is only in our neck of the woods. Radio Astronomy goes where optical Astronomy can only dream of, and Dr. Chapman shares her passion for the field through the pages of this book. Going from our own solar system to black holes and galaxies far far away, Chapman describes the contributions of her field to what is known of the universe, as well as what is only conjecture and what may never be explained. The language is approachable and not too heavy on the science. Even the most theoretical concepts are explained in a way that even I understood, without dumbing it down either, Just plain spoken. The descriptions are expressed so well that I pictured myself walking down the lava tubes on the Moon, staring at the massive mountains on Venus or even looking into Sagittarius A*, the black hole at the center of our galaxy. There are chapters dedicated to exoplanets, dark matter, dark energy and even the possibility of intelligent life on other planets. Not a quick read, but fascinating.
I chose to read this book and all opinions in this review are my own and completely unbiased. Thank you, NetGalley/Basic Books.

[Steve · Rating 5 out of 5]

I thoroughly enjoyed this book. I thought that the science was well-explained, with some great analogies. I also appreciated the author’s journey and her enthusiasm for the subject matter, the latter of which I found contagious. The book is written with a highly conversational tone and with a great sense of humour. Overall, this is great science writing. Thank you to Netgalley and Basic Books for the advance reader copy.

[Jerry]

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