Moons like Pandora or Endor are staples of science fiction, but astronomers have yet to discover any beyond our solar system. However, researchers might soon not only be able to spot them, but ...

The film "Avatar" is set on the inhabited moon Pandora. ... telltale fingerprint to the atmosphere's composition. An Earth-sized moon could be studied if conditions are just right.

Life-bearing moons like Pandora or the Star Wars ... the James Webb Space Telescope will be able to study its atmosphere and detect ... telltale fingerprint to the atmosphere's composition.

If it does, those gases will absorb a fraction of the star’s light during the transit, leaving a tiny, telltale fingerprint to the atmosphere’s composition.