Definition

Proper noun 1. A constellation: "Southern Triangle" is the common name for the constellation Triangulum Australe. It is a small but distinct constellation in the southern celestial hemisphere, characterized by its three bright stars forming a prominent triangular shape.

Usage

• The word "Southern Triangle" is used as a proper noun to specifically identify this constellation. It is always capitalized.
• It is typically used in astronomical contexts, such as in star charts, astronomy guides, or when describing the night sky in the Southern Hemisphere.

Examples

• Proper noun:
  • The Southern Triangle is one of the 88 modern constellations recognized by the International Astronomical Union.
  • To find the star Alpha Centauri, you can use the Southern Triangle as a guidepost in the sky.
  • Unlike its fainter northern counterpart (Triangulum), the Southern Triangle is quite bright and easy to spot.

Advanced Usage

• "Triangulum Australe": This is the Latin, scientific name for the constellation. "Southern Triangle" is its English equivalent. In formal astronomical writing, the Latin name is often preferred.
  • The constellation Triangulum Australe was first catalogued by the Dutch astronomer Petrus Plancius in the 16th century.

Variants and Related Words

• Triangulum Australe (n): The Latin name for the Southern Triangle constellation.
• Triangulum (n): A separate, smaller and fainter constellation in the northern hemisphere, known as "The Triangle".

Synonyms

• Triangulum Australe (n): The formal Latin synonym.

Notes on Meaning

• The term refers exclusively to the constellation. It is not used as a general geometric term for any triangle located in the south.
• Its defining characteristic is its simple, bright triangular asterism (star pattern), which makes it easily recognizable.

Noun

1. a small bright constellation in the polar region of the southern hemisphere near Circinus and Apus