Covenant astronomy

The Covenant and its member cultures have rich astronomical traditions. Many of these date back to the pre-Covenant practices of the San'Shyuum and Sangheili. Some aspects of Covenant astronomy have even been inspired by newer member species such as the Lekgolo, some subcultures of which exhibit an interest in astronomy.

Constellations
Like humanity, most of the Covenant species have identified stellar constellations in the skies of their homeworlds, though different cultures ascribe different meanings and variable amounts of importance to these star patterns. To the Sangheili, constellations were particularly important, and their cultural significance in the early days of their astronomy has remarkable parallels to humanity's own. Sanghelios constellations, too, usually identify stellar patterns as mythical or divine figures, objects or places. Constellations have endured as a key fixture of Sangheili astronomy and astronavigation as the species' knowledge of the heavens improved, and they are often used to identify spatial directions and astronomical features even today. Such traditions continued even as the species spread to other worlds, with many of the Sunlit Worlds in particular devising their own sets of constellations.

In contrast, though the early San'Shyuum had their own systems of constellations, they were mostly replaced by less fanciful ways of mapping the celestial sphere as the species' astronomy developed on Janjur Qom.

Covenant names for astronomical features
The majority of the Covenant names for astronomical features are of either Sangheili or San'Shyuum origin. There is a relatively even split in which names predominate in the modern Covenant, though Sangheili names are more common particularly in the spinward side of the Holy Ecumene due to the ancient Sangheili's well-developed astronomy.