'Saharan starry night' diaporamas de présentation

Astronomers label stars within a constellation based on their apparent brightness ,

As early as 5000 years ago, people began naming patterns of stars, called constellations , in the honor of mythological characters or great heroes. Today, 88 constellations are recognized. They divide the sky into disjoint units. Every star in the sky is in one of these constellations.

620 views • 43 slides