Cosmologists are finally beginning to sketch a coherent picture of the universe we cannot see, using exquisitely detailed maps of galaxies, ghostly light and the large scale structure of space itself.

For decades, black holes have stood as the most enigmatic objects in the universe, defying our understanding of space, time, ...

The moon — for all its silent loveliness — was born in violence. About 4.5 billion years ago, a planet-sized object rammed the Earth and reduced it to a bleeding molten gob of starstuff, leaking like ...