Ancient near eastern (ANE) cosmology refers to the plurality of cosmological beliefs in the Ancient Near East from the 4th millennium BC to the formation of the Macedonian Empire by Alexander the Great in the second half of the 1st millennium BC. This system of cosmology went on to have a profound influence on views in Egyptian cosmology, early Greek cosmology, later Jewish cosmology, patristic cosmology, and Islamic cosmology. Until the modern era, variations of ancient near eastern cosmology survived with Hellenistic cosmology as the main competing system.

Ancient Greek astronomy is the astronomy written in the Greek language during classical antiquity. Greek astronomy is understood to include the Ancient Greek, Hellenistic, Greco-Roman, and late antique eras. Ancient Greek astronomy can be divided into three primary phases: Classical Greek Astronomy, which encompassed the 5th and 4th centuries BC, and Hellenistic Astronomy, which encompasses the subsequent period until the formation of the Roman Empire ca. 30 BC, and finally Greco-Roman astronomy, which refers to the continuation of the tradition of Greek astronomy in the Roman world. During the Hellenistic era and onwards, Greek astronomy expanded beyond the geographic region of Greece as the Greek language had become the language of scholarship throughout the Hellenistic world, in large part delimited by the boundaries of the Macedonian Empire established by Alexander the Great. The most prominent and influential practitioner of Greek astronomy was Ptolemy, whose treatise Almagest shaped astronomical thinking until the modern era. Most of the most prominent constellations known today are taken from Greek astronomy, albeit via the terminology they took on in Latin.