Stuart Clark is a contemporary English writer and widely read astronomy journalist.

He is a Fellow of the Royal Astronomical Society and a former Vice Chair of the Association of British Science Writers.

On 9 August 2000, UK daily newspaper The Independent placed him alongside Stephen Hawking and the Astronomer Royal, Professor Sir Martin Rees, as one of the 'stars' of British astrophysics teaching.

There he taught undergraduates, postgraduates and the general public, whilst researching star formation, planetary habitability and the origins of life.

In a paper published by Science in 1998, he helped develop the current paradigm that the left-handed amino acids necessary for the origin of life on Earth were synthesized in star-forming regions spread throughout the Galaxy.