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SpaceShipOne becomes the first privately funded aircraft to enter space, which is a significant step in the development of private spaceflight and space tourism.

The Voyager 1 spacecraft makes its closest approach to Saturn, providing detailed images and data of Saturn’s rings and moons, vastly improving our understanding of the outer solar system.

The Space Shuttle Challenger disaster occurs shortly after launch, leading to the deaths of all seven crew members. This tragedy resulted in a 32-month suspension of the shuttle program and new safety measures.

NASA's Juno spacecraft enters orbit around Jupiter, aiming to study the planet's composition, gravity field, magnetic field, and polar magnetosphere. It helps to understand Jupiter's formation and evolution.

The Parker Solar Probe, the closest spacecraft to the Sun, begins its mission to study the solar corona and solar wind, improving our understanding of solar phenomena and space weather.

Yuri Gagarin becomes the first human in space and completes an orbit of Earth aboard Vostok 1. This event is a major milestone in space travel and showcases human potential to venture into space.

The Phoenix Mars Lander touches down on Mars, confirming the presence of water-ice in the Martian soil, which is crucial for the ongoing search for past or present life on Mars.

Launch of Kepler Space Telescope, designed to discover Earth-like planets orbiting other stars. The findings from this mission have drastically increased the number of known exoplanets.

NASA's Perseverance rover successfully lands on Mars, tasked with searching for signs of ancient life and collecting samples for possible return to Earth on future missions.

Launch of Sputnik 1, the first artificial satellite, by the Soviet Union. It marked the beginning of the space age and the start of the space race between the U.S. and the USSR.

The Rosetta spacecraft's Philae lander becomes the first to soft-land on a comet (67P/Churyumov-Gerasimenko), providing unprecedented insights into the composition and structure of cometary nuclei.

Launch of Pioneer 10, the first spacecraft to travel through the Asteroid belt and make direct observations of Jupiter, significantly advancing our knowledge of the solar system.

Voyager 1 takes the Pale Blue Dot photograph of Earth, which showed Earth's insignificance in the vast cosmos and highlighted the fragility of our home planet.

Apollo 11 Moon landing. The mission allowed humans to walk on the Moon for the first time and represented a milestone for space exploration and humanity.

The Galileo spacecraft arrives at Jupiter, conducting in-depth studies of the planet and its moons. It was the first spacecraft to orbit an outer planet and provided valuable data for several years.

James Webb Space Telescope launched on an Ariane 5 rocket from French Guiana. The most powerful space telescope is designed to study the universe's earliest stages and observe distant planets.

SpaceX's Falcon 1 becomes the first privately developed liquid-fueled rocket to orbit the Earth, marking an important milestone for private space ventures and the commercial space industry.

NASA's New Horizons spacecraft performs a flyby of Pluto, giving us the first high-resolution images of the dwarf planet's surface and providing a wealth of scientific data.

The Hubble Space Telescope is launched into low Earth orbit by the Space Shuttle Discovery. It has significantly contributed to astronomy, allowing deeper and clearer views of the universe than ever before.