Einstein's theory of gravity — general relativity — has been very successful for more than a century. However, it has theoretical shortcomings. When you purchase through links on our site, we may earn ...

Why is the expansion of our universe accelerating? Twenty-five years after its discovery, this phenomenon remains one of the greatest scientific mysteries. Solving it involves testing the fundamental ...

Space's latest X-ray telescope, aptly named after the most famous physicist of all time, is poised to unveil the mysteries of nature's most extreme phenomena. Reading time 2 minutes The Einstein Probe ...

The fabric of space and time is not exempt from the effects of gravity. Plop in a mass and space-time curves around it, not dissimilar to what happens when you put a bowling ball on a trampoline. This ...

The European Space Agency (ESA) said Monday that its Euclid space telescope has detected a rare bright halo of light around a nearby galaxy. Known as an Einstein ring, the halo was captured in photos ...

The telescope will hunt for bursts of X-rays from mysterious and fascinating cosmic objects like neutron stars and black holes. When you purchase through links on our site, we may earn an affiliate ...

Monisha Ravisetti was a science writer at CNET. She covered climate change, space rockets, mathematical puzzles, dinosaur bones, black holes, supernovas, and sometimes, the drama of philosophical ...

Einstein's theory of general relativity views time similarly to width, height, and length. As such, both time and space can be curved by gravity. This effectively means that time is slower the closer ...

New claims challenge inconsistencies in one of the foundational principles of physics. What could this mean for geophysics ...

A compound lens forged by two galaxies is helping astronomers get a bead on the Hubble Constant and dark energy. Reading time 3 minutes A light source in space originally believed to be a galaxy ...

As telescopes peer into the universe, they sometimes see quirks of nature that magnify faraway objects. These eight galaxies recently imaged by the James Webb Space Telescope (JWST) appear stretched, ...