In Northern Hemisphere autumn (Southern Hemisphere spring), you can see some constellations representing a "celestial ocean in the sky" to early stargazers.
Spot the constellation Cassiopeia the Queen somewhere in the northern sky during much of the year, and throughout much of the night. It's high overhead now.
Sextans the Sextant is in a dim patch of sky between Leo and Hydra that is home to some interesting galaxies, and one of the largest supermassive black holes.
Can you find the long, meandering river of stars called Eridanus in your sky? Seeing Eridanus can give you a kinship with stargazers from centuries ago.