An animation of how the SETI ellipsoid grows over time. (Image credit: Zayna Sheikh) The hope is that technological aliens who have seen SN 1987A would synchronize their signals with it, knowing ...

A gamma ray packs at least 10,000 times more energy than a visible light ray. Unlike the Incredible Hulk , gamma rays are not green — lying as they do beyond the visible spectrum, gamma rays ...

Gamma-ray bursts, the most powerful kinds of explosions known in the universe, can generate even more energetic light beams than astronomers previously realized, according to a set of new studies.

Now a study using the Fermi Gamma-ray Space Telescope has used the light emanating from supermassive black holes known as blazars to measure the diffuse light produced by reionization.

The cosmos keeps outdoing itself. Extremely energetic light from space is an unexplained wonder of astrophysics, and now scientists have spotted this light, called gamma rays, at higher energies ...

Light rays that originate from the light source and pass through a lens (a) to reach the target can travel through the wider area of the convex lens (b) compared to the concave lens (c).

The world's brightest laser can "transform" visible light into X-rays, making the shape and color of objects appear different, new research shows. Skip to main content. Open menu Close menu ...