Albert Einstein didn't discover anything in space in the literal sense. He was a theoretical physicist who developed theories about the universe, gravity, and light, but he never directly observed space.

However, his work has revolutionized our understanding of the universe:

* General Relativity: Einstein's theory of general relativity explained gravity as a curvature of spacetime caused by mass and energy. This theory has allowed us to understand the behavior of massive objects like stars, galaxies, and black holes.

* Gravitational Lensing: Einstein predicted that light would bend around massive objects due to gravity. This phenomenon, called gravitational lensing, has been observed and used to study distant galaxies and even map the distribution of dark matter.

* Red Shift: Einstein's theories predicted that light from distant objects would appear redder due to the expansion of the universe. This phenomenon, known as redshift, has been observed and provides strong evidence for the Big Bang theory.

In summary: Einstein's work was fundamental to our understanding of space, but he didn't make direct observations of it. His theoretical work laid the foundation for many of the discoveries we have made about the universe.