New observations by the James Webb Space Telescope suggest that an icy moon around Uranus may have an underground liquid ocean.

Ariel is one of 27 moons around Uranus, the seventh planet from the sun and the third largest planet in the solar system. It’s one of four moons that scientists have long been interested in as part of a search for water across the solar system, the others being Umbriel, Titania and Oberon.

Ariel is named after a character in William Shakespeare’s “The Tempest,” while Titania and Oberon are from his “A Midsummer Night’s Dream.”