Once its antennas were deployed, Explorer 49 was the largest human-made object to orbit the Moon as of 2022.
Launched in 1972 and weighing 258 kilograms (569 pounds), Pioneer 10 completed the first mission to the planet Jupiter and became the first of five...
“The UK 4 (United Kingdom Research Satellite 4), a.k.a. Ariel 4, was a small observatory designed to investigate the interactions between electromagnetic...
This is how Deputy Chief Designer for OKB-1, Boris Chertok described the launch of Mars 3. “The red disk of the Sun was just touching the horizon...
Mariner 8 and 9 were virtually identical and designed to continue the atmospheric studies begun by Mariner 6 and 7, and to hopefully map over 70% of...