semimajor axis

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Definitions from WordNet

Noun semimajor axis has 1 sense

semimajor axis - one-half the major axis of an ellipse; the distance from the center of an ellipse to one end
--₁ is a kind of axis
--₁ is a part of major axis

Definitions from the Web

Semimajor Axis

Definition:

The semimajor axis is a term primarily used in the field of astronomy to describe the largest distance between the center and any point on an elliptical orbit or an ellipse. It is one of the key parameters used to determine the shape and size of celestial bodies.

Sample Sentences:

As a noun:

The semimajor axis of Earth's orbit around the sun is approximately 149.6 million kilometers.
The moon's semimajor axis is 384,400 kilometers, which is the average distance from the moon to the Earth.
Scientists use the semimajor axis to calculate the orbital period of planets.

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