constellation does not rotate at all, but the Earth does
Galileo did not discover any new constellations. Instead, he made important observations about the existing constellations and their movements in the night sky, using his telescope to study the stars and planets.
The Babylonians are credited with the discovery and naming of most of the constellations.
There are 88 recognized constellations in the night sky. Some have been discovered but not recognized. And their still some to discover that may be recognized.
All the constellations appear to rotate round the pole star because the pole star is in line with the axis that the Earth rotates around with us on board.
It is impossible to say when star constellations were "first discovered".The stars in the heavens have been recorded since man first learned to write.There are many instances of the stars being recorded in the Christian Bible and Holy books of other religions
It was one of the 48 constellations listed by the 2nd century astronomer Ptolemy. (Wikipedia)
The North Star, or Polaris. This star remains nearly stationary in the sky while all other stars seem to rotate around it due to the Earth's rotation on its axis.
Nobody discovered constellations; they were invented. Somebody must have said something like "this group of stars looks like such-and-such", and given it the appropriate name.
The belt of constellations through which all the planets move is called zodiac. The true shape of the planetary orbits was discovered by Kepler.
In the Northern Hemisphere, when facing North, towards the Pole Star (Polaris) Ursa Major and surrounding constellations, rotate counter-clockwise (right to left).Turn round to face south (with Polaris behind you) the stars rotate clockwise (left to right).
Like most constellations Aquarius is a borrowing by the Greeks from the Babylonians, who had been around since 1830 BC.
Orion is one of the most noticeable constellations in the sky, and has been known since antiquity.