Cosmology
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Cosmology is the study of the nature of the universe, the cosmos. The term cosmology was first used in English in 1656 in Thomas Blount's Glossographia, with the meaning of "a speaking of the world".
Except for the few stars in the foreground (which are bright and easily recognizable because only they have diffraction spikes), every speck of light in the composite photo is an individual galaxy, some of them as old as 13.2 billion years; the observable universe is estimated to contain more than 2 trillion galaxies. From the Hubble eXtreme Deep Field.
CHINTREUIL Le Boulot blanc
Cosmos
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The cosmos is an alternative name for the universe or its nature or order. Usage of the word cosmos implies viewing the universe as a complex and orderly system or entity.
Cosmology
…Cosmology (from Ancient Greek κόσμος (cosmos) 'the universe, the world' and -λογία (logia) 'study of') is the study of the nature of the universe, the cosmos. The term cosmology was first used in English in 1656 in Thomas Blount's Glossographia, with the meaning of "a speaking of the world". In 1731, German…
Stars rotating in the night sky
Flammarion engraving, Paris, 1888
Copernicus' Heliocentric Solar System
Excerpt from Philolaus Pythagoras book (Charles Peter Mason, 1870)