Radmila Topalovic is an urban astronomer and physics teacher based in South-East London, and Astronomer Emeritus of the Royal Observatory Greenwich. She holds a degree in Physics with Astrophysics and a PhD in Astrochemistry. Her biggest passions are quantum physics and astrobiology.

Dr. Dominic Ford is a Senior Research Associate at the Institute of Astronomy, Cambridge UK, where he works on the European Space Agency's PLATO mission. He previously led the development of data-analysis software for spectroscopic surveys of the Milky Way at Lund Observatory, Sweden.

He has worked on many science communication and amateur astronomy projects. He founded the website In-The-Sky.org, an online guide to what is visible in the night sky, which can be tailored to your exact location on Earth. He previously managed the British Astronomical Association's website and built an online image archive which now holds over 80,000 images of the night sky. In 2022, Dominic was awarded the British Astronomical Association's Horace Dall Medal for the development of software for amateur astronomers.

The Royal Observatory, Greenwich is the home of Greenwich Mean Time and the Prime Meridian of the World, making it the official starting point for each new day and year. It is also home to London's only planetarium, the Harrison timekeepers and the UK's largest refracting telescope. It runs the annual Astronomy Photographer of the Year competition.

Collins Astronomy is the home of the bestselling annual Guides to the Night Sky, Night Sky Almanac and also publishes the Astronomy Photographer of the Year collection and other popular astronomy books.