It's tricky to say definitively which constellation is the "largest" because there are different ways to measure it.

Here's a breakdown:

* By Area: Hydra is the largest constellation by area, covering a whopping 3.16% of the night sky.

* By Number of Stars: This one is more subjective as star visibility depends on brightness and location. However, some consider Virgo to have the most visible stars.

* By Number of Objects: Centaurus is often cited for having the most known stars, galaxies, and other celestial objects within its boundaries.

So, while Hydra takes the crown for sheer area, Virgo and Centaurus can also be considered "largest" depending on your criteria.