Penguin Limerick

A penguin, resplendent in tux,
Has homing skills just like a duck's.
To achieve the South Pole,
He just heads for his goal:
The Southern Cross tail, Acrux.

Source: The Omnificent English Dictionary In Limerick Form

Note: Acrux is the brightest star in constellation Crux (the Southern Cross) and the thirteenth brightest star in the nighttime sky, at visual magnitude 0.77.