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.
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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48
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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60
Turns out, it's as tough to drop inward into the inner solar system, as it is to head outward. The problem stems from losing momentum from a launch starting point on Earth. It can take missions several years and planetary ...
Space Exploration
Apr 4, 2025
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64
How prepared are we to deflect an asteroid heading towards Earth? This question is answered by two studies just published in Nature Communications, the result of a collaboration between Politecnico di Milano, Georgia Institute ...
Planetary Sciences
Feb 20, 2025
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90
As more satellites, telescopes, and other spacecraft are built to be repairable, it will take reliable trajectories for service spacecraft to reach them safely. Researchers in the Department of Aerospace Engineering in The ...
Space Exploration
Feb 14, 2025
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52
As the Artemis campaign leads humanity to the moon and eventually Mars, NASA is refining its state-of-the-art navigation and positioning technologies to guide a new era of lunar exploration.
Space Exploration
Jan 14, 2025
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33
Exiting Earth's gravity takes an enormous amount of fuel and power. Due to this, spacecraft strapped to rockets are limited in their carry capacity and every gram must be accounted for.
Space Exploration
Jan 9, 2025
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20
Getting places in space quickly has been the goal of propulsion research for a long time. Rockets, our most common means of doing so, are great for providing lots of force but are extraordinarily inefficient. Other options ...
Space Exploration
Dec 16, 2024
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77
A spacecraft that can provide the propulsion necessary to reach other planets while also being reproducible, relatively light, and inexpensive would be a great boon to larger missions in the inner solar system.
Space Exploration
Dec 10, 2024
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