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Launch of Sputnik 1 was launched by the Soviet Union. The launch of Sputnik 1 is important because it was the first space craft into orbit.
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First animal to orbit. This is important because it shows that you could have living things in space and in orbit.
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First solar powered satellite went into orbit. This is important because it shows that you can have a solar powered satellite in space and into orbit.
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First rocket enigine to restart in Earth's orbit. The first rocket engine to restart in Earth's orbit is important because it showed that you could restrt an engine in orbit.
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First satellite recovered intact from orbit is important because it showed that you could have a satellite recovery.
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First ship to have radio-to-contact, and first ship to use radio-to-contact. The first ship to have radio-to-contact is important because if something went wrong then the people in the rocket could let the other people know.
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First piloted spacecraft in an orbit change. The first piloted spacecraft in a orbit is important because it showed that humans can go into orbit.
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First crew exchange in space. This is important because it showed that a crew can exchange things in orbit.
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Landing of the first humans on the moon. The landing of the first humans on the moon is important because it showed that humans can be on the moon.
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First man to dance on the moon is important because it showed that humans can walk/dance on the moon.
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First national human-crewed mission is important because it showed that humans can crew a mission in space.
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