When you buy through links on our articles, Future and its syndication partners may earn a commission. A dark matter halo with a galaxy at its heart. It's possible, however, that not all dark matter ...

Photographers across Dorset have been sharing stunning images of a natural phenomenon. Last night a lunar halo could be spotted around the moon. The phenomenon is caused by the refraction of moonlight ...

DURING May and June, 1912, several correspondents described a number of optical phenomena, principally solar haloes, which they had observed just before the commencement of the remarkable haze which ...