The planet experiences similar insolation to Earth, which has led to speculations about the possibilities for habitable moons.

Gabriel headed the terraforming team, chartered to create a habitable moon from the jumble of raw material that made up Harlequin's moon system.

"But is not the moon habitable for creatures differently organized from ourselves?"

Within range of the early Isitri warp craft, with two habitable moons and one inner planet.

Vysu was orbited by two habitable planets, Daribo and Irath, each of which had one habitable moon.

This is somewhat ameliorated by suggestions that a gas giant inside the HZ might have habitable moons under the right conditions.

The planet's discoverers speculated about the possibility of a habitable moon:

Some astrobiologists, such as Dirk Schulze-Makuch have theorised that a sufficiently massive natural satellite may form a habitable moon similar to Earth.

Hugh manages to land on the habitable moon of a gas giant.

It is a marginally habitable moon of a supergiant planet called Cat's Eye, the fourth planet in the Byer's star system.