Canceled orbiter mission concept to Jupiter
Europa Jupiter System Mission ? Laplace
Artist concept of the Europa Jupiter System Mission: Jupiter Europa Orbiter (top) and Jupiter Ganymede Orbiter (bottom).
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Mission type
| Multiple orbiters and lander
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Operator
| Proposed joint
NASA
/
ESA
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The
Europa Jupiter System Mission ? Laplace
(
EJSM-Laplace
) was a proposed joint
NASA
/
ESA
uncrewed space mission
slated to launch around 2020 for the in-depth exploration of
Jupiter's moons
with a focus on
Europa
,
Ganymede
and Jupiter's
magnetosphere
. The mission would have comprised at least two independent elements, NASA's
Jupiter Europa Orbiter
(JEO) and ESA's
Jupiter Ganymede Orbiter
(JGO), to perform coordinated studies of the Jovian system.
The Japan Aerospace Exploration Agency (
JAXA
) and the
Roscosmos
(Russian Space Agency) had expressed their interest in contributing to EJSM-Laplace, although no deals had been finalized.
[
citation needed
]
JEO was estimated to cost US$4.7 billion,
[1]
[
failed verification
]
while ESA would spend US$1.0 billion (€710 million) on JGO.
[2]
In April 2011, European Space Agency (ESA) stated that it seemed unlikely that a joint US?European mission will happen in the early 2020s given NASA's budget, so ESA continued with its initiative, called the
Jupiter Icy Moons Explorer
(JUICE) that will be based on the JGO design. Selection of JUICE for the L1 launch slot of ESA's
Cosmic Vision
science programme was announced on 2 May 2012.
[3]
JUICE was launched on 14 April 2023.
Later, in June 2015, NASA approved the
Europa Clipper
and it entered the formulation stage,
[4]
with an expected launch in October 2024.
[5]
Origins
[
edit
]
In February 2008,
NASA
and
ESA
began joint investigations into sending a probe to study the icy satellites of the outer
Solar System
under the title
Outer Planet Flagship Mission
.
[6]
Two primary candidate missions were considered under the study: EJSM and
Titan Saturn System Mission
(TSSM), also known under the ESA designation TandEM.
In February 2009, it was announced that NASA/ESA had given EJSM priority ahead of the TSSM.
[7]
[8]
The ESA contribution still faced funding competition from two other missions, the
Laser Interferometer Space Antenna
(LISA) and the
International X-ray Observatory
(IXO), which is why NASA kept a contingency plan of sending its part of the mission as a stand-alone project.
[9]
Mission architecture
[
edit
]
The most distinctive feature of the EJSM/Laplace-study, was the proposed collaboration with multiple orbiters and landers:
The baseline EJSM architecture consisted of JEO and JGO, which were proposed to be launched in 2020 and explore the Jupiter System before settling into orbit around Europa and Ganymede, respectively. The JEO and JGO were separate and independent spacecraft developed, launched and operated by their respective organizations to work together. Their launch dates and interplanetary trajectories were not to be dependent on each other, but would have been synergistic.
[10]
Goal
[
edit
]
The goal was to determine whether the Jupiter system harbors
habitable environments
, while focusing on
Europa
and
Ganymede
. The main science objectives supporting this goal were:
[10]
- Characterize sub-surface oceans
- Characterize the ice shells and any subsurface water
- Characterize the deep internal structure for Ganymede and the intrinsic magnetic field
- Compare the
exospheres
,
plasma
environments, and magnetospheric interactions.
- Determine global surface compositions and chemistry
- Understand the formation of surface features, including sites of recent or current activity, and identify and characterize candidate sites for future
in situ
exploration.
References
[
edit
]
External links
[
edit
]
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