Darkness Visible
Twinkle, twinkle, little star
How I wonder what you are ...
A small number of astronomers have been searching the universe for X-rays from the sun and from other stars and galaxies. They have discovered neutron stars, black holes, X-ray galaxies and quasars, flashing and pulsing with radiation more powerful than originally thought possible. Narrator VERNON JOYNER
Editor SIMON CAMPBELL-JONES
Written and produced by DICK GILLING