The flashes of white light accompanying some solar flares are caused by the sun's acceleration of electrons to speeds greater than half the speed of light. The phenomenon's new explanation derives ...

A red column ... of the light, he told Chron it might be an atmospheric optical phenomenon known as a light pillar, which is caused by "ice clouds reflecting back light from a flare or possibly ...

In spite of their dark reputations, two black holes may have set off a cosmic light show. Subtle gravitational rumbles from a collision of two black holes may have been accompanied by a flare of ...

The Earth-bound M8.9 solar flare, which the sun spewed yesterday ... explain how sun's charged particles are accelerated to near-light speeds. But NASA won’t know how the spacecraft fared ...