-
1984- First untethered spacewalk, by Bruce McCandless II NASA
-
1998-First multinational space station, which is the largest man-made object built in space to da
-
2001- First landing on an asteroid by USA
-
2015- First flyby of dwarf planet Pluto by the US
-
2016-Astronaut Scott Kelly and Cosmonaut Mikhail Kornienko return to Earth after their 340-day space mission, longest recorded time up in space
