[3] Clube obtained his doctorate in 1959 with a thesis titled Interferometry of the Solar Chemosphere and Photosphere[4] and went on to become a professional astrophysicist and astronomer.
He has been Dean of the Astrophysics Department of Oxford University, and has worked at the observatories of Edinburgh, Armagh and Cape Town.
[5] Co-authored with William Napier they put forward a case for giant comets causing what they call "coherent catastrophism".
Astrophysicist David Morrison " describes their work as an argument that: the association of gods with planets in many ancient cultures, the widespread fear of comets and belief in angels, and many other aspects of our cultural and religious history are a reflection of massive bombardment of the planet a few thousand years ago.
They further conclude that more recent historical events, including the collapse of the Roman Empire, the Dark Ages, and even the English Civil War, are related to climate changes induced by exceptional deposition of cosmic dust in Earth's atmosphere.