The key answer of exercise 1

Albert Einstein, Stephen Hawking, and Valentina Tereshkova share prominence in the realms of physics and space exploration, each contributing uniquely to our understanding of the universe. Einstein's groundbreaking work in theoretical physics, including the theory of relativity and E=mc², revolutionized our comprehension of space and time. Stephen Hawking, a renowned theoretical physicist and cosmologist, is celebrated for his insights into black holes, Hawking radiation, and his bestselling book "A Brief History of Time," which brought complex scientific concepts to a wider audience. Valentina Tereshkova, an accomplished Russian cosmonaut and engineer, etched her name in history by becoming the first woman in space, orbiting the Earth aboard Vostok 6 in 1963. Together, these individuals have left an indelible mark on the frontiers of science and exploration.