Humanity's robotic and crewed explorers.
Launched 1977, now in interstellar space — the most distant human-made object, more than 15 billion miles from the Sun. Radio signals take over 22 hours one-way.
Source: NASA Voyager mission
An infrared observatory at the Sun–Earth L2 point (1.5 million km away), seeing the first galaxies that formed after the Big Bang.
Source: NASA Webb mission
NASA's Mars rover (landed 18 Feb 2021) searching for signs of ancient microbial life and caching samples in Jezero Crater.
Source: NASA Mars 2020
The first crewed Moon landing, 20 July 1969: Neil Armstrong and Buzz Aldrin walked on the Sea of Tranquility while Michael Collins orbited above.
Source: NASA Apollo programme