Which constellation was created to represent a microscope?

The constellation created to represent a microscope is Microscopium.

Microscopium is a small constellation in the southern celestial hemisphere. French astronomer Nicolas-Louis de Lacaille introduced it in the 1750s after surveying the southern sky from the Cape of Good Hope. He Latinised the French name le Microscope as Microscopium, linking the constellation to the compound microscope and to the scientific instruments celebrated during the Enlightenment.

Lacaille created 14 southern constellations, most of them depicting instruments or tools. Microscopium occupies a relatively inconspicuous region bordered by Capricornus, Sagittarius, Indus, Grus, Piscis Austrinus, and Telescopium. Its stars are faint, so observers in light-polluted skies may struggle to identify it even when it is above the horizon.

Gamma Microscopii is the constellation’s brightest star, at about magnitude 4.67. Despite its modest appearance, the region contains notable stellar systems. AU Microscopii hosts a debris disk and belongs to the Beta Pictoris moving group; several other stars in Microscopium are known to have planets. Telescopium is a neighbouring instrument-themed constellation, not the answer.