Cygnus
Definition
Proper noun 1. A constellation in the northern hemisphere: Cygnus is a prominent constellation located in the Milky Way, between the constellations Pegasus and Draco. It is notable for containing the Cygnus X-1 system, a well-known source of X-rays believed to be a black hole. 2. A genus of birds in the family Anatidae: In taxonomy, Cygnus is the genus that includes most swans, large, long-necked waterfowl.
Usage Examples
- As a constellation:
- On a clear summer night, you can see Cygnus, also called the Northern Cross, high in the sky.
- Astronomers study the black hole in Cygnus X-1 to learn about high-energy physics.
- As a genus name:
- The mute swan, common in parks, belongs to the genus Cygnus.
- The trumpeter swan (Cygnus buccinator) is the largest native waterfowl in North America.
Advanced Usage
- In mythology: In Greek and Roman mythology, the constellation Cygnus is often identified with the transformed shape of Zeus/Jupiter or other figures like the musician Orpheus or the youth Cygnus, a friend of Phaethon.
- The myth explains how Cygnus was placed among the stars as a swan.
Variants and Related Words
- Cygnian (adj): Pertaining to the constellation Cygnus or to swans.
- Cygnian stars are a target for many amateur astronomers.
- Cygnus X-1 (n): A specific X-ray source in the constellation Cygnus, the first widely accepted astronomical discovery of a black hole candidate.
Synonyms
- For the constellation: The Northern Cross, The Swan.
- For the genus: Swan (as a common name for birds within the genus).
Related Phrases
- The Swan (Neck): A descriptive term sometimes used for the constellation's shape or for specific nebulas within it (e.g., the North America Nebula lies in Cygnus).
- We observed the Veil Nebula, which is in the "wing" of Cygnus.
Noun
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a genus of Anatidae
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a constellation in the northern hemisphere between Pegasus and Draco in the Milky Way; contains a black hole
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