March 21 in Universe History: Space Missions, Satellites and Exploration
March 21, 2026
1963
On 21 March 1963, transmitters aboard the Soviet Mars 1 probe fell silent. The final radio contact occurred when the craft was about 106 million km from Earth, ending communications during cruise and leaving it to proceed toward its planned Mars flyby without further telemetry, after earlier relays had returned measurements of interplanetary conditions between Earth and Mars.
All names in this article
Alphonsus
Arianespace
ASI
AsiaSat 3S
Atlas-Agena
AVUM
Baikonur
BOLT-2
BurstCube
Cape Canaveral
Cassini
CRS-30
Dragon
Drew Feustel
Europe’s Spaceport
Expedition 1
Expedition 55
Expedition 56
Falcon 9
French Guiana
High Energy Solar Spectroscopic Imager
Imaging Science Subsystem
Ingenuity
International Launch Services
JPL
Kennedy
L4 Lagrange point
Leonardo
Marina Vasilevskaya
Mars 1
MDIS
Mercury
MESSENGER
Mid-Atlantic Regional Spaceport
NASA Planetary Data System
National Reconnaissance Office
NROL-123
Oleg Artemyev
Oleg Novitskiy
OneWeb
PDS4 Standards Reference
Perseverance
PRISMA
Proton
Ranger 9
Ricky Arnold
Rocket Lab Electron
Saturn
Soyuz Flight ST28
Soyuz MS-08
SpaceX
SPICE
Starsem
Terrier-Improved Malemute
Titan
Tracy Dyson
Vega
Wallops
Wallops Island
Asia
Europe
Russia
Air Force Research Laboratory
Earth
Io
Moon
Sun
International Space Station
Space Shuttle Discovery
STS-102