Read the text and determine if the sentence is true (see options at the end):

NASA's Saturn exploration spacecraft, Cassini , has discovered an atmosphere about the moon Enceladus . This is the first such discovery by Cassini, other than Titan , of the presence of an atmosphere around a Saturn moon.

Sentence: Cassini was a failure.
Available choices:
(I) Yes.
(II) It's impossible to say.
(III) No.