Astrodynamics is the research area concerned with the modeling, analysis, and control of the motion of natural and artificial bodies in space under the influence of gravitational and non-gravitational forces. It encompasses orbital mechanics, trajectory design and optimization, mission analysis, attitude–orbit coupling, and perturbation theory for multi-body environments. The field integrates celestial mechanics, numerical methods, optimal control, and spacecraft propulsion modeling to enable precise prediction and adjustment of trajectories for applications such as orbit insertion, station-keeping, interplanetary transfers, formation flying, and proximity operations, often requiring high-fidelity dynamical models and robust estimation techniques for navigation and guidance.
Advanced space travel relies on a fundamental understanding of the restricted three-body problem (RTBP), in which one of the three bodies—typically a spacecraft—is so small that its gravity doesn't affect the other two, such ...
Space Exploration
Sep 22, 2025
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When Anil Menon launches into space aboard a Russian Soyuz rocket next June, he'll bring two decades of experience as a physician, engineer, military pilot, and NASA flight surgeon—and a highly personal understanding of risk.
Space Exploration
Sep 18, 2025
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Selecting the right spot to smash a spacecraft into the surface of a hazardous asteroid to deflect it must be done with great care, according to new research presented at the EPSC-DPS2025 Joint Meeting in Helsinki. Slamming ...
Planetary Sciences
Sep 9, 2025
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The Three-Body Problem isn't just the name of a viral Netflix series or a Hugo Award-winning sci-fi book. It also represents a real problem in astrodynamics—and one that can cause headaches for mission planners in terms of ...
Space Exploration
Aug 19, 2025
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After nearly 20 years of operations, NASA's Mars Reconnaissance Orbiter (MRO) is on a roll, performing a new maneuver to squeeze even more science out of the busy spacecraft as it circles the Red Planet. Engineers have essentially ...
Space Exploration
Jun 26, 2025
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Mars has received considerable attention in the past few decades, thanks to the many robotic missions exploring it to learn more about its past. NASA and China plan to send astronauts/taikonauts there in the coming decades, ...
Space Exploration
Jun 3, 2025
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In recent years, humanity has visited several near-Earth asteroids (NEAs), including Ryugu (Hayabusa2) and Didymos (DART). However, we will need more frequent missions to start gathering more helpful information about this ...
Space Exploration
May 21, 2025
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Tracking exoplanets via orbital mechanics isn't easy. Plenty of variables could affect how a planet moves around its star, and determining which ones affect any given exoplanet requires a lot of data and a lot of modeling.
Astronomy
May 20, 2025
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When you put your hand out the window of a moving car, you feel a force pushing against you called drag. This force opposes a moving vehicle, and it's part of the reason why your car naturally slows to a stop if you take ...
Space Exploration
May 7, 2025
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On March 15 at 8:15 p.m. Beijing time (March 14 at 8:42 p.m. EDT; 5:42 p.m. PDT), China launched two satellites atop a Yuanzheng-1S mounted on a Long March-2C rocket. While the first and second stages were successful, a technical ...
Space Exploration
Apr 23, 2025
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