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Aphelion vs Diameter - What's the difference?

aphelion | diameter |

As nouns the difference between aphelion and diameter

is that aphelion is (astronomy) the point in the elliptical orbit of a planet, comet, etc, where it is farthest from the sun while diameter is (geometry) any straight line between two points on the circumference of a circle that passes through the centre/center of the circle.

aphelion

English

Noun

(aphelia)
  • (astronomy) The point in the elliptical orbit of a planet, comet, etc., where it is farthest from the sun.

    • Antonyms

    * perihelion

    Related terms

    * apogee * perihelion * apolune * perilune * apastron

    diameter

    English

    (wikipedia diameter)

    Alternative forms

    * diametre

    Noun

    (en noun)
  • (geometry) Any straight line between two points on the circumference of a circle that passes through the centre/center of the circle.
  • (geometry) The length of such a line.
  • (geometry) The maximum distance between any two points in a metric space
  • (graph theory) The maximum eccentricity over all vertices in a graph.

    • Related terms

    * diametric * diametrically * semidiameter

    See also

    * circumference * radius

    Anagrams

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