The skies above the airfield lit up, with wide luminous flashes reaching out along the skyline.

"Again," Leeta commanded, and three more luminous flashes sped forward, this time devastating the forward hull, where its command center would be located.

A gamma-ray burst is a highly luminous flash of gamma rays, the most energetic form of electromagnetic radiation.

It doesn't happen every night, but if you get a really good, clear sunset on Barbados, there's this sudden, luminous green flash in the sky just before the sun vanishes.

A gamma-ray burst is a highly luminous flash of gamma rays, the most energetic form of electromagnetic radiation, which is often followed by a longer-lived "afterglow" emitting at longer wavelengths (X-ray, ultraviolet, optical, infrared, and radio).

Sprites appear as luminous reddish-orange flashes.

They dissolved into luminous green flashes.

A gamma-ray burst is a highly luminous flash associated with an explosion in a distant galaxy and producing gamma rays, the most energetic form of electromagnetic radiation, and often followed by a longer-lived "afterglow" emitted at longer wavelengths (X-ray, ultraviolet, optical, infrared, and radio).

And this," here she turned her veiled features toward Theos, whose heart beat furiously as he caught a luminous flash from those half-hidden, brilliant eyes, "this is the unwitting stranger who honored me by so daring a scrutiny this morning!