Europa Jupiter System Mission – Laplace Explained

Europa Jupiter System Mission – Laplace
Mission Type:Jupiter exploration
Operator:NASA / ESA
Mission Duration:Cancelled
Launch Mass:Jupiter Europa Orbiter

Jupiter Ganymede Orbiter

Launch Date:2020
Launch Rocket:Jupiter Europa Orbiter
Delta IV Heavy
Jupiter Ganymede Orbiter
Ariane 5
Interplanetary:
Type:orbiter
Arrival Date:2026 (proposed)
Type:orbiter
Arrival Date:2025–2026 (proposed)
Programme2:Large Strategic Science Missions
Planetary Science Division

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. JEO was estimated to cost US$4.7 billion,[1] 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

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

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

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]

External links

Notes and References

  1. http://books.nap.edu/openbook.php?record_id=13117&page=365 Vision and Voyages for Planetary Science in the Decade 2013–2022 (2011)
  2. News: Peter B.. de Selding. Europe's Next Big Mission Depends on U.S. and Japan. 4 February 2011. Space News. 22 May 2011.
  3. News: Jonathan. Amos. Esa selects 1bn-euro Juice probe to Jupiter. BBC News Online. 2 May 2012 . 2 May 2012.
  4. Howell, Elizabeth (20 June 2015). "NASA's Europa Mission Approved for Next Development Stage" Space.com. Retrieved 21 June 2015
  5. https://europa.nasa.gov/mission/about/ "Europa Clipper Mission Overview"
  6. http://opfm.jpl.nasa.gov/ Outer Planet Flagship Mission
  7. Web site: NASA and ESA Prioritize Outer Planet Missions . 18 February 2009 . 25 August 2011 . https://web.archive.org/web/20110825211633/http://www.nasa.gov/topics/solarsystem/features/20090218.html . dead .
  8. News: Rincon . Paul . Jupiter in space agencies' sights . . 18 February 2009.
  9. Web site: Outer Planet Flagship Mission: Briefing to the OPAG Steering Committee. PDF. OPF Study Team . Outer Planets Assessment Group. 28 August 2008. 14 October 2008.
  10. Web site: Europa Jupiter System Mission (EJSM). NASA Jet Propulsion Laboratory (JPL). dead. https://web.archive.org/web/20090811022733/http://opfm.jpl.nasa.gov/europajupitersystemmissionejsm/. 9 August 2009. 11 August 2009.