// ORBITAL LOGISTICS AND PROPULSION TERM
Flyby Mission
A flyby mission is a space mission where a spacecraft passes close to a celestial body without entering its orbit or landing on it. It's often used for initial reconnaissance.
TECHNICAL DEFINITION
A space exploration mission profile where a spacecraft travels past a celestial body, collecting data during a brief close approach, without entering orbit or landing, often used for initial reconnaissance or gravity assist maneuvers.
BACKGROUND
The idea of sending humans to Mars has been the subject of aerospace engineering and scientific studies since the late 1940s as part of the broader exploration of Mars. Long-term proposals have included sending settlers and terraforming the planet. Currently, only robotic landers, rovers and a helicopter have been on Mars. As of 2026, the farthest humans have been beyond Earth is the Moon and its vicinity, with the lunar flights of the Apollo program from 1968 to 1972 and the Artemis II lunar flyby in 2026, both of which were operated by NASA.
READ MORE ON WIKIPEDIASYNONYMS & ALIASES
- Reconnaissance flyby
- Close approach mission
- Pass-by mission
- Transit mission
USAGE NOTE
The Voyager probes conducted numerous flyby missions of outer planets.
DEVELOPERS
Organizations developing technology related to Flyby Mission.
NASA is a primary agency for space exploration, planning, developing, and executing numerous flyby missions to study planets, moons, asteroids, and comets throughout the solar system. Their missions like Voyager and New Horizons are iconic flyby examples.
ESA conducts a wide range of space science and exploration missions, frequently utilizing flyby trajectories for gravity assists or initial observations of celestial bodies, such as with their Rosetta and BepiColombo missions.
JAXA is Japan's national aerospace agency, involved in planetary exploration that includes missions with flyby components, like the Hayabusa asteroid sample return missions and the Akatsuki Venus orbiter, which used Earth and Venus flybys.
Managed by Caltech for NASA, JPL designs, builds, and operates many of NASA's robotic planetary missions, including those that perform critical flybys for scientific data collection and trajectory adjustments, such as Galileo and Juno.
APL is a leader in developing and operating deep-space missions, notably the New Horizons mission which performed the first flybys of Pluto and Arrokoth, and the MESSENGER mission which completed multiple flybys of Mercury.
As a major aerospace manufacturer, Lockheed Martin Space builds spacecraft and instruments for various deep space missions for agencies like NASA, many of which involve complex flyby maneuvers for scientific exploration or trajectory shaping.
A prime contractor for many European space missions, Airbus Defence and Space contributes to the design and construction of spacecraft that perform flybys, particularly for ESA's planetary exploration programs like BepiColombo.