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In 1608, Galileo Galilei built the "first telescope" starting the begging of space exploration but some people believe that it wasn't him who built the first telescope and that he just took the idea from someone else. This telescope was a refracting telescope.
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Galileo Galilei takes the first observation of the night sky and discovers Jupiters moons, lunar craters, in the phases of Venus
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The first clear telescopic photograph of the moon
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Herman Oberth helped design the V-2 rocket which was the first human – made object to travel into space
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The first space research flight
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The Soviet Union launched Sputnik 1, the first artificial satellite
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The Soviets launched Sputnik 2, which carried the first animal to go into orbit, a dog name Laika
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The first photograph of Earth in orbit from Explorer 6
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The first plants and animals to return alive from Earth orbit
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The first human-piloted space flight by Alan Shepard and first human space mission the landed with the pilot still in it, technically completing the first complete space flight.
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Neil Armstrong becomes the first man on the moon
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The first mission to enter the asteroid belt and leave the inner Solar System
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The first photos and samples from Mars
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The first photos and samples from Mars
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The first photograph of the whole Solar System
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THe Hubble Space Telescope was put into orbit and has been there for 25 years to this day
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The first multinational space station and the largest man-made object built in space to date
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Kepler Mission is launched. The first space telescope designated to search for Earth-like exoplanets
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Lettuce became the first food eaten and grown in space
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Astronaut Scott Kelly and cosmonaut Mikhail Kornienko return to Earth after their 340-day space mission. It was the longest recorded time in space for ISS crew members.
