apsis

Meanings

• noun

  The point in an elliptical orbit where the radius vector of the orbiting body is perpendicular to the line joining the body to the focus.

  - "In astronomy, the apsis of a planet's orbit is the point where it is closest to the sun."
  - "The perigee is the apsis of an elliptical orbit where the body is closest to the focus."

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Variants

List of all variants of apsis that leads to same result
apsides , apsis

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Etymology

origin and the way in which meanings have changed throughout history.

From the Ancient Greek word 'apsis' meaning 'limb' or 'curved part'.

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Trivia

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1. The term 'apsis' is also used in mathematics to describe the point of intersection between two circles or conic sections.

2. The word 'apsis' is derived from the Ancient Greek word 'apsis', meaning 'limb' or 'curved part'.

3. In astronomy, the term 'apsis' is used to describe the points in the orbits of both planets and moons.

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Related Concepts

informations on related concepts or terms closely associated with the word. Discuss semantic fields or domains that the word belongs to

1. Elliptical orbit: An elliptical orbit is a type of orbital trajectory where the body moves around a focus in an elliptical or oval-shaped path.

2. Perigee: The point in an elliptical orbit where the body is closest to the focus.

3. Apogee: The point in an elliptical orbit where the body is farthest from the focus.

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Culture

Any cultural, historical, or symbolic significance of the word. Explore how the word has been used in literature, art, music, or other forms of expression.

In ancient Greek astronomy, the term 'apsis' was used to describe the points in an elliptical orbit where the body is closest to or furthest from the focus. These points were also known as 'perigee' and 'apogee', respectively.

How to Memorize "apsis"

1. visualize
   

   - Imagine an ellipse with the sun at one focus. Visualize a point on the ellipse where the radius vector is perpendicular to the line joining the point to the sun. This point is the apsis.

2. associate
   

   - Associate the term 'apsis' with 'apex' and 'axis'. An apsis is the point where an elliptical orbit reaches its highest or lowest point, much like the apex of a mountain or the axis of a spinning top.

3. mnemonics
   

   - Use the mnemonic 'An apple never falls far from the Apsis' to remember that the apsis is the point in an elliptical orbit where the body is closest to or furthest from the focus.

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