If true, it could mean the universe is destined to collapse rather than expand forever. Einstein proposed the cosmological ...

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 ...

The universe rarely fails to amaze. One of its latest surprises—nicknamed the “Einstein zig-zag”—reveals a stunning arrangement of galaxies and a distant quasar. Together, they produce a gravitational ...

Learn more about the images advanced telescopes could take of black holes and how they could back up Einstein’s general ...

As new and powerful telescopes gather fresh data about the universe, they reveal the limits of older theories like Einstein's relativity. When you purchase through links on our site, we may earn an ...

Black holes, regions of spacetime in which gravity is so strong that nothing can escape, are intriguing and extensively ...

Astrophysicists at the University of Chicago have developed physics-based models suggesting that dark energy could be changing over time. Dark energy, the mysterious force causing the universe to ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Image of the galaxy NGC 6505: the Einstein ring created by this gravitational lens can be seen in ...

The faster you move, the stranger time becomes. By imagining how light travels to two people moving at different speeds, Einstein showed that time isn’t absolute. His thought experiment revealed that ...