Nov 13, 2025 · Achieving spaceflight enabled humans to begin to explore the solar system and the rest of the universe, to understand the many objects and phenomena that are better …

Nov 13, 2025 · Space exploration - Milestones, Achievements, History: The first artificial Earth satellite, Sputnik 1, was launched by the Soviet Union on October 4, 1957. The first human to …

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 …

You’ll find on this page a collection of facts about everything from the size of the universe to the business of space. All of these facts and numbers add up to a vivid portrait of space.

Although its borders already have been crossed, space still holds mysteries and, undoubtedly, surprises beyond number. The space age began on October 4, 1957, when the Soviet Union …

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 …

This list provides answers to 12 questions about the history of space exploration.

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 …

Introduction Through space exploration humans have learned a great deal about the planets, stars, and other objects in space. More than 5,000 spacecraft have been launched into space …

Nov 28, 2025 · Outer space is the region beyond Earth’s atmosphere. It has been considered by some as beginning at the Kármán line, 80 to 100 km (50 to 62 statute miles) above sea level.