All galaxies (including our own) are thought to exist inside a giant cosmological structure called a dark matter halo - a cloud-like phenomenon made up of invisible ... halos weighing 100 million to 1 ...

Hong Kong on Tuesday witnessed a rare natural phenomenon, a halo around the sun, that can be experienced only when meteorological conditions are right. The Observatory posted pictures on its ...

Instead, the moon appeared as a smaller disk in front of the sun, creating a bright halo of light exposed around its edges commonly known as a "ring of fire." The annular solar eclipse didn't ...