Welcome to Explaining Science


I am Steve Hurley and welcome to Explaining Science

I started this popular science blog back in April 2014, originally under the name The Science Geek. It has gradually grown over the years to have around 2,400 followers and is now considered by the aggregator site feedspot.com to be one of the top astronomy blogs on the internet.  It has also been mentioned on the BBC news website.

Explaining Science contains articles on astronomy, space and space travel – written at a level which is easily accessible to the non-scientist but without being dumbed down. This is often a difficult balance to achieve, but I hope I manage it most of the time.

There are over 150 posts available; to view the most recent click on the icon below


My own favourite posts

I’ve listed below a selection of my posts, which have attracted the greatest interest among my readers and  which I’ve enjoying writing the most. To view any of these posts please click on its hyperlink.

How does GPS work?

The anthropic principle – the idea  that the laws of physics, and the properties of the Universe as a whole, are somehow finely tuned to allow our existence.

Geocentric cosmology  – the obsolete model in which the Earth is the the centre of the Universe and all the planets and stars revolve around it.

October 4 1957 the start of the ‘space age’ with the launch of the first artificial satellite Sputnik 1.

Leap Seconds – the need to periodically add a second to keep accurate clocks in line with solar time.

The cosmic microwave background

The Perseids – the regular meteor shower which occurs around August 12 each year.

Why is the sky blue?

A brief history of the Universe – an outline history of the Universe from the Big Bang until the the present day. This, as I am sure you’ll agree, is a pretty big topic!

Enceladus- Could there be life?  Discusses the likelihood of life on Saturn’s moon Enceladus

I have also written three popular astronomy books

The Moon

A short e-book on the Moon. For more details click here. 



Venus and How to Terraform it


Venus, is  the planet closest to the Earth in distance, size and internal composition, and the third brightest natural object in our sky after the Sun and the Moon.  This book focuses on our sister planet and discusses what we would need to do if humanity were ever to build settlements on it.  It is available as a paperback; for more details click here or for e-book format click here.


Click here for more details on my short e-book on the likelihood of there being extraterrestrial intelligent life and how humans have tried to find these life forms and make contact with them


Find out more

To find more about me and about my publications click here.