Definition

1. Noun:
   • The point on the celestial sphere directly opposite the solar apex: The "antapex" is the point in the sky away from which the Sun and the solar system are moving relative to the local standard of rest of stars in our galaxy.

Usage

• The term "antapex" is used almost exclusively in astronomy and astrophysics. It describes a specific, calculated direction in space, opposite to the direction of the Sun's motion (the solar apex).

Examples

• Noun:
  • Astronomers calculated the antapex to better understand the Sun's trajectory through the Milky Way.
  • The solar apex and the antapex are two fundamental reference points for studying the peculiar motion of our solar system.

Advanced Usage

• "Direction of the antapex": Refers to the vector pointing to this specific celestial coordinate.
  • The spacecraft's velocity vector was nearly aligned with the direction of the antapex.

Variants and Related Words

• Solar apex (n): The point on the celestial sphere toward which the Sun and the solar system are moving. This is the direct antonym of the antapex.
• Apex (n): In a general sense, the highest point or the climax. In the astronomical context, it specifically refers to the "solar apex."

Synonyms

• Solar antapex: This is a more precise, full term often used interchangeably with "antapex."

Antonyms

• Solar apex: The point toward which the solar system is moving.

Noun

1. the point opposite in direction from the solar apex; the point the solar system is moving away from