A major realization of Einstein’s general relativity is the fact that massive objects warp space-time in a way that is ...

A team of astronomers has identified a double gravitational lens system with an extraordinary “zig-zag” light path, rewriting ...

A compound lens forged by two galaxies is helping astronomers get a bead on the Hubble Constant and dark energy.

Earlier studies had suggested that such an image could result from a natural compound lens. Using data from the James Webb ...

Each type has spin-offs. Refractor telescopes gather light with the objective lens, where light enters the scope. The wider ...

A galaxy cluster bends light from seven background galaxies around it, letting astronomers peer into space and time ...

Over the quarter century I’ve been writing this column, I’ve been flabbergasted by the advances in telescopes for backyard ...

Space-based telescopes are remarkable. Their view isn't obscured by the weather in our atmosphere, and so they can capture ...

The primary telescope tube was constructed from 4- and 5-inch PVC drainage pipes sourced from a local hardware store. For the ...

In astrophotography, I would say 70% is technique and 30% is the equipment. I spent a lot of time learning the technique behind those incredible images of the galaxies, Zubuyer says ...