Century Publishing Co. Ltd.

To measure a galaxy's speed, astronomers spread out its light into a spectrum (rainbow). This reveals the range of wavelengths - from 'short' (blue) to 'long' (red) - emitted by its stars. The spectrum is crossed by dark absorption lines, which correspond to the absorption of light at particular...

PREFACE uring the winter of the year 1808, a new inhabitant appeared in the little Buckinghamshire town of Beaconsfield-a retired lawyer named William Hickey, who, having long practised his profession with considerable advantage at the Indian bar, had recently, much against his will, been obliged...