Crux few bright stars of importance lie between Crux and the pole itself, although the constellation Musca is fairly easily recognised immediately beneath Crux. A technique used in the field is to clench one's right fist and to view the cross, aligning the first knuckle with the axis of the cross. The tip of the thumb will indicate south. Argentine gauchos are well known for using it for night orientation in the vast Pampas and Patagonic regions. Within the constellation's borders, there are 49 stars brighter than or equal to apparent magnitude 6.5. The four main stars that form the asterism
Crux 67 degrees south declination for the middle of the constellation. But in AD 18000 or BC 8000 Crux will be and was less than 30 degrees south declination making it visible in Northern Europe. Even by AD 14000, it will be visible for most parts of Europe and the whole United States. In the Southern Hemisphere, the Southern Cross is frequently used for navigation in much the same way that Polaris is used in the Northern Hemisphere. Alpha and Gamma (known as Acrux and Gacrux, respectively) are commonly used to mark south. Tracing a line from Gacrux to Acrux leads