NASA’s foremost solar system explorer says Europa lander a “necessity”

Charles Elachi has been director of the Jet Propulsion Laboratory for 15 years. (credit: NASA/JPL-Caltech)

The fact that Charles Elachi is retiring after 15 years of directing NASA's Jet Propulsion Laboratory in June may have him willing to speak freely. During a hearing Thursday before a Congressional committee, Elachi apparently had no qualms about contradicting NASA's administrator, Charles Bolden.

Bolden has said NASA should fully explore Europa with a flyby mission before building and flying a lander to Jupiter's ice-covered moon, which contains a vast, subsurface ocean. "Our belief is that that is imprudent from a scientific perspective," NASA's administrator told Ars late last year.

During the Congressional hearing, however, Elachi said his engineers could design both a flyby spacecraft and lander that could fly to Europa in tandem. Moreover, Elachi said, to really begin addressing the question of life existing on Europa, such a mission must have the capability to reach the surface. "In order to make sure we have confirmation, we really need to make direct measurements on the surface, to take samples," he said. "Clearly a lander, in my mind, is a necessity to understand the oceans on Europa."

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