Europa is the star of the show. By proving that there is indeed a liquid, briny ocean, [Galileo] transformed it from a mere moon to a prime candidate for extraterrestrial life. |
We certainly don't want to waste investments of hundreds of millions of dollars, especially when they're up there and ready to go. |
You can't do the Europa mission cheaply because of the harsh environment in which that mission will operate. Yet these [flagship missions] are critical to approaching some of the very important questions we wish to address. |