Constellation
The largest of all 88 constellations, representing a water serpent.
| Type | Constellation |
|---|---|
| Area of sky | 1,303 sq° |
| Brightest star | Alphard |
| Brightest star magnitude | mag 2 |
| Hemisphere | Southern |
| Zodiac constellation | No |
| Discovered | 150 |
A constellation is a pattern drawn on the sky rather than a physical grouping: its stars are usually unrelated and sit at wildly different distances, just lined up as seen from Earth.
Hydra covers 1,303 square degrees of sky, which is 3.2 percent of the whole celestial sphere.
That makes it the 1st largest of the 88 constellations the International Astronomical Union recognises.
It sits in the southern sky.
Its brightest star reaches magnitude 2, bright enough to pick out with the naked eye under a dark sky.
Play today's Cosmodle