Globus Aerostaticus, the hot-air balloon:
Originally created by French astronomer Joseph Jerome le Francais
de La Lande in 1798 to honor the hot-air balloon, which was considered
a scientific breakthrough of the time. The constellation was composed
of dim stars that were located between Capricornus, the sea-goat,
and Microscopium, the microscope. Although the constellation appeared
in several star atlases, in never became official and fell out of
use by astronomers.