Alex Foster, the author of the latest read for the New Scientist Book Club, Circular Motion, on imagining a world that is ...

In fact, only three factors can be used to define a black hole: its mass, its angular momentum and its electric charge. In reality, that charge will be neutral or very close to it, so in practical ...

When you hear about planetary transits and movements, it might sound complicated, but it doesn’t have to be. The planets are always moving, and just like the moon affects the tides, these celestial ...