Four-and-a-half months after the James Webb Space Telescope's Christmas Day launch, engineers have achieved near-perfect alignment of its complex optical system, setting the stage for final instrument ...

Stargazers witnessed a rare celestial event on Monday, as Mercury passed directly across the face of the sun. Mercury, the solar system's smallest planet and closest to the sun, won't make the next ...

Archaeologists have long wondered how the ancient Egyptians aligned the corners of the pyramids of Giza along the cardinal points so accurately. But now an electrical engineer with an interest in ...