This NASA/ESA Hubble Space Telescope image offers us the chance to see a distant galaxy now some 19.5 billion light-years ...

The discovery in 1998 that the Universe is expanding faster over time shook the foundations of cosmology. This finding ...

A Growing Mystery The discovery of the Universe’s accelerating expansion in 1998 left scientists scratching their heads, ...

Einstein rings created by gravitational lensing are not just cosmic eye candy. This ring was captured during ... two-and-a-half times larger than the Hubble Space Telescope's mirror, meaning ...

It's two galaxies, many billions of light-years apart, combined into one by a rare cosmic phenomenon called an Einstein ring ... quirks of nature — a gravitational lens. It's when the ...

creating a ring-like shape. This effect, called gravitational lensing, is a direct consequence of Einstein’s theory of general relativity, which describes how massive objects can warp the fabric ...

But perhaps the most beautiful effect of gravitational lensing is what's known as an Einstein Ring. This is where the distant galaxy is so perfectly centered behind the closer galaxy that its ...

This "rare cosmic phenomenon", called an Einstein ring ... the more distant galaxy looks like a ring because it has been distorted by gravitational lensing. Gravitational lensing occurs when ...