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  1. Space exploration | History, Definition, & Facts | Britannica

    Nov 13, 2025 · Space exploration, investigation, by means of crewed and uncrewed spacecraft, of the reaches of the universe beyond Earth’s atmosphere and the use of the information so gained to …

  2. Space exploration - Astronauts, Technology, Discoveries | Britannica

    Nov 13, 2025 · The results of these space investigations have made major contributions to an understanding of the origin, evolution, and likely future of the universe, galaxies, stars, and planetary …

  3. Space exploration - History, Technology, Benefits | Britannica

    Nov 13, 2025 · Space exploration - History, Technology, Benefits: Since ancient times, people around the world have studied the heavens and used their observations and explanations of astronomical …

  4. Space exploration - Milestones, Achievements, History | Britannica

    Nov 13, 2025 · The first human to go into space, Yuri Gagarin, was launched, again by the Soviet Union, for a one-orbit journey around Earth on April 12, 1961. Within 10 years of that first human flight, …

  5. Space exploration - Solar System, Probes, Missions | Britannica

    Nov 13, 2025 · Space exploration - Solar System, Probes, Missions: From the start of space activity, scientists recognized that spacecraft could gather scientifically valuable data about the various …

  6. Space exploration - Astronomy, Technology, Discovery | Britannica

    Nov 13, 2025 · After Gagarin’s 1961 flight, space missions involving human crews carried out a range of significant research, from on-site geologic investigations on the Moon to a wide variety of …

  7. Space exploration - Technology, Cost, Benefits | Britannica

    Nov 13, 2025 · Space exploration and development have been stimulated by a complex mixture of motivations, including scientific inquiry, intense competition between national governments and …

  8. Space exploration - Applications, Benefits, Technology | Britannica

    Oct 29, 2025 · Space exploration - Applications, Benefits, Technology: Space visionaries in the early 20th century recognized that putting satellites into orbit could furnish direct and tangible benefits to people …

  9. Space exploration - Human, Debate, Consequences | Britannica

    Nov 13, 2025 · Space exploration - Human, Debate, Consequences: By the early 2020s more than 500 people, coming from more than 40 different countries and more than 10 percent of whom were …

  10. History and significant events in space exploration | Britannica

    A succession of longer and more complex manned space missions followed, most notably the U.S. Apollo program, including the first manned lunar landing in 1969, and the Soviet Soyuz and Salyut …