Footage shows victim in chains pleading with family to pay kidnappers; police say they were trying to get him released.

The NSO described the sun as "a plasma laboratory right on our doorstep" and said that the VTF's image gives promise that ...

The PV-driven redox flow battery can reportedly achieve a maximum solar-to-output electricity efficiency of 3.11% during a 36-hour period. The system incorporates a 25 cm2 heterojunction photovoltaic ...

Inouye Solar Telescope's new Visible Tunable Filter ... the instrument uses an etalon — two glass plates separated by mere microns."The principle is not unlike that of noise-canceling headphones ...