What does APSIS mean?

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1. Parts of Speech: Noun

2. Definitions:

• The point in the orbit of a celestial body, especially a planet, at which it is furthest from its star.
• The point in the orbit of a satellite at which it is furthest from the body that it is orbiting.

3. Pronunciations:

• US: /ˈæpsɪs/
• UK: /ˈapsɪs/

4. Origin and Usage:

The word "apsis" comes from the Greek word "apsis," meaning "arch" or "vault." It was first used in English in the mid-17th century to describe the point in a planets orbit at which it is furthest from the sun. Today, it is used in astronomy to describe the points in the orbits of celestial bodies that are furthest from their stars or the bodies they are orbiting.

5. Synonyms:

• Periapsis
• Apocenter
• Far point

6. Related Words:

• Aspis
• Sapid
• Paisa
• Pitas
• Spica

7. Example Sentences:

• The apsis of Mars is about 249 million kilometers from the sun.
• The satellite reached its apsis and began its descent back to Earth.