NASA and ESA decide on Jupiter mission before Saturn (Titan)

Saturday, February 21, 2009

Ganymede: huge but largely ignored.

Here's an update to that post I wrote about a meeting between NASA and ESA officials on how to proceed on a mission to Jupiter's moons vs. Saturn (Titan), and I'm a fan of both missions so I suppose I would have been pleased with about anything they decided. The upcoming missions look pretty interesting:
The missions, called the Europa Jupiter System Mission and the Titan Saturn System Mission, are the result of NASA and ESA merging their separate mission concepts. NASA originally studied four mission concepts during 2007, which were narrowed down to two proposals in 2008. One finalist was a Europa Orbiter to explore that icy moon of Jupiter and its subsurface water ocean. The other was a Titan Orbiter to visit the Saturn moon. Independently, in 2007, ESA also initiated a competition to select its flagship mission for the Cosmic Vision 2015-2025 slot of the ESA scientific programme. Two finalists, called Laplace and Tandem, were selected by ESA for further study. Laplace was a set of spacecraft to orbit Jupiter and eventually orbit and land on Europa. Tandem was a set of spacecraft intended to orbit Titan and explore its surface, after also exploring the surface of Saturn's moon Enceladus.

NASA and ESA engineers and scientists carefully studied both potential missions in preparation for last week's meeting. Based on these and other studies as well as stringent independent assessment reviews, NASA and ESA agreed that the Europa Jupiter System Mission, called Laplace in Europe, was the most technically feasible to do first. However, ESA's Solar System Working Group concluded the scientific merits of this mission and a Titan Saturn System Mission could not be separated. The group recommended, and NASA agreed, that both missions should move forward for further study and implementation.

"The decision means a win, win situation for all parties involved," said Ed Weiler, associate administrator for NASA's Science Mission Directorate in Washington. "Although the Jupiter system mission has been chosen to proceed to an earlier flight opportunity, a Saturn system mission clearly remains a high priority for the science community."
on the probes to Jupiter:
The orbiters would spend nearly a year orbiting Europa and Ganymede. NASA's probe would investigate whether Europa might harbor life, and ESA's spacecraft would orbit Ganymede to conduct investigations of the surface and interior of this satellite, to better understand the formation and evolution of the Jovian system.
I'm actually a bit of a fan of Ganymede even though it doesn't get all that much attention despite the fact that it's the largest moon in the whole Solar System. It also has a bit of an atmosphere.


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