This single “star” showed three sets of spectral lines, quite unprecedented in astronomy. One set was apparently normal and showed a small Doppler shift of 70 km/s, expected for the star's direction and distance in the Galaxy.
This book is a guide to the ninety-nine per cent of cosmic reality we can’t see – the Universe that is hidden, right in front of our eyes. It is also the endpoint of a scientific detective story thousands of years in the telling.
The Invisible Universe: Probing the frontiers of astrophysics
This extensive volume, an outgrowth of a topical and tutorial summer school, has been set up with the aim of constituting an advanced-level, multi-authored textbook which meets the needs of both postgraduate students and young researchers ...
In imagination I often wonder what it would be like to live on another planet that happens to be located within 30 lightyears of a star that explodes as a supernova. Imagine a technologically sophisticated civilization like ours.