Cosmology is the scientific study of the universe as a whole, including its origin, evolution, and ultimate fate.

Euclid is a historical figure known as the "Father of Geometry" and is believed to have lived around 300 BCE in ancient Greece.

The European Space Agency (ESA) is an intergovernmental organization dedicated to space exploration and scientific research.

The Wikipedia page "Expansion of the universe" provides a comprehensive overview of the scientific theory and evidence supporting the idea that the universe is expanding.

Falcon 9 is a two-stage reusable rocket designed and manufactured by SpaceX, a private aerospace company founded by Elon Musk.

Falcon 9 Block 5 is a reusable two-stage rocket designed and manufactured by SpaceX.

General relativity, also known as the general theory of relativity, is a theory of gravitation that was developed by Albert Einstein in the early 20th century.