When did humans begin to study constellations?

The earliest detailed and scientific research in China should be that in 207 AD, Master Wu ordered Chen Zhuo to compile a catalogue, with a total of 283 *** 1464, most of which were named after feudal emperors.

The earliest study of constellations in the west should be traced back to Babylonians around 3000 BC. By the 2nd century AD, ancient Greek astronomers had roughly determined the constellations in the northern sky! Nantian District was determined in17th century after sailing around the world ~!