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SESK: Stuff Everyone Should Know · sesk.info/aero-hohmann-least-propellant

What is an interplanetary Hohmann transfer known for?

It moves a spacecraft between orbits using the least propulsive energy.

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  1. It is the fastest possible route
  2. It uses the least propulsive energy ✔
  3. It needs no engine burns at all

Why: An interplanetary Hohmann transfer follows an ellipse between two planetary orbits. It takes longer than higher-energy routes, but it minimizes the propellant needed.

Huh, didn't know that: Missions to Mars often use a Hohmann style path, which takes many months.

The dad joke
The Hohmann transfer is the scenic route of space. Slow, but cheap on gas.
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References

Answer: It uses the least propulsive energy. An interplanetary Hohmann transfer follows an ellipse between two planetary orbits. It takes longer than higher-energy routes, but it minimizes the propellant needed.

  1. NASA Science, Basics of Spaceflight Glossary science.nasa.gov/learn/basics-of-space-flight/glossary
    Hohmann Transfer Orbit -- Interplanetary trajectory using the least amount of propulsive energy.
    Checked 2026-10-10.
  2. NASA Science, Basics of Space Flight, Chapter 4 science.nasa.gov/learn/basics-of-space-flight/chapter4-1
    To launch a spacecraft from Earth to an outer planet such as Mars using the least propellant possible
    Checked 2026-10-10.

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