A team of astronomers have found a mysterious object in the distant universe that could be dark matter or an inactive smaller ...

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 ...

The story begins with the black hole information paradox. According to relativity, anything that falls into a black hole is ...

Scientists are rethinking the universe’s deepest mysteries using numerical relativity, complex computer simulations of Einstein’s equations in extreme conditions. This method could help explore what ...

The gravitational lensing that causes this rare phenomenon cannot be explained solely by looking at observable ...

From early experiments with lanterns to Einstein’s revelations about space and time, the speed of light has proven to be far more than a number: it’s the cosmic constant that defines reality.

Planets that orbit white dwarf stars should be too hot to host alien life, theories suggest. But a new study accounting for ...