Theory of relativity

The black hole forms part of a triple star system known as HR 6819, which can be seen without binoculars or telescopes from the southern hemisphere on a dark, clear night.

"Simulations and movies like these really help us visualize what Einstein meant when he said that gravity warps the fabric of space and time," the creator of the images said.

Einstein was born in Germany in 1879.

Scientists hit the road with a high-precision clock hooked up to a trailer.

The planet Mercury was the key for this latest feat.

Einstein predicted that gravity and light could be used to calculate the mass of a star. But he never thought scientists could actually do it.

Since HG Wells imagined humans traveling in time with technology, literature has inspired science. Will time travel be possible one day?

By 1921, Einstein was recognized as one of the most talented minds of his generation.