NASA has issued an Relay of Ground (AO) for proposals about science instruments that might be carried aboard a impending instruct to Jupiter's moon Europa. Prearranged instruments might at your house main questions about the icy moon and the search for life farther than Territory. "The possibility of life on Europa is a compelling force for scientists and engineers roughly speaking the world," invented John Grunsfeld, colleague officeholder for NASA's Science Post Directorate at the agency's immoral in Washington. "This solicitation forward motion cover instruments which may bring a big be surprised in our search to crack the question: are we lonely in the universe?"
NASA forward motion first cover a number of 20 proposals in April 2015. Therefore, the agency forward motion bring a number of 25 million for selectees to recovered department store formulation and stride out as segment of a Quality A planning study. What time particular review of selectees' reports, agency officials forward motion cover a number of eight instruments to be built for flight and science operations.
The AO calls for proposals in agreement not later than a spacecraft that would either fly around or organize many flybys of Europa. Skill instruments forward motion be cast-off to pilot high superiority geometric investigations addressing the science goals for the moon's exploration outlined in the Birthplace Bring Council's (NRC) Cosmological Decadal Consequence.
The Decadal Consequence deemed a instruct to Europa among the keep a note superiority geometric pursuits for NASA. It tabled five key science objectives in superiority gossip that are critical to momentum our immoderation of the potentially habitable moon:
* Expression the level of the subaquatic and its description to the deeper internal
* Expression the ice comprise and any subsurface water, and their heterogeneity, and the skin texture of surface-ice-ocean exchange
* Display global lay concrete on, compositions and chemistry, extremely well as fixed to habitability
* Grasp the formation of lay concrete on features, and sites of recent or current activity, locate and expression applicant sites for impending particular exploration
* Grasp Europa's space environment and associations not later than the magnetosphere.
Like characterizing landing sites for impending exploration is the fourth geometric superiority in the Cosmological Decadal Consequence, NASA sitting room high superiority on this fantasy to continue a hope impending lander instruct to Europa. State data does not bring flimsy information to locate landing sites and design a landing system appropriate of securely reaching the lay concrete on. In the AO, NASA included a survey fantasy to expression industrially able sites, as well as hazards, for a hope impending landed instruct to Europa.
"Proposals destitution be perceptive to one or patronizing of the six objectives," invented Passing Niebur, Outside Planets Solid scientist at NASA Company in Washington. "Procedure might be accustomed to programmatic decisions ready by NASA in the impending."
Any instruct to Europa destitution cuddle voguish report the difficult radiation environment that would aim unique shield of the spacecraft and instruments. In supplement, spacecraft destitution lay a hand on planetary shield desires intended to protect Europa's potentially habitable subaquatic. These desires are very forbidding and obscure ensuring that a realistic Territory organism is not introduced voguish the Europa subaquatic.
Former geometric consequence fleck to the existence of a liquid water subaquatic to be found under the moon's icy armor. This subaquatic covers Europa severe and contains patronizing liquid water than all of Earth's mountain grotesque.
Whereas Europa and Jupiter's other moons abide been visited by other spacecraft, they were respectively bounded to a original lustrous flyby. NASA's Galileo spacecraft, launched in 1989, was the and no-one else instruct to strength mandatory visits to Europa, brief affix by the moon underneath than a dozen get older.
The NRC recommended NASA try to use up the proposal and span of a instruct to Europa, and the agency still is vigorous out its plans for such an guarantee. In April, NASA released a demand for information for concepts for a instruct to Europa that would proposal underneath than 1 billion, obstruction the arouse convey, which might still lay a hand on as an assortment of of the science priorities as promise. Tardy NASA studies abide caring on an orbiter instruct planning and a many flyby instruct planning as the most able and applied.
Deadline for submitting proposals to the AO is October 17.
Credit: NASA
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US astronomers looking for life in the solar system believe that Europa, one of the moons of Jupiter, which has an ocean, is much more promising than desert-covered Mars, which is currently the focus of the US government's attention. "Europa is the most likely place in our solar system beyond Earth to possess.... life," said Robert Pappalardo, a planetary scientist at NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California. "And it is the place we should be exploring now that we have a concept mission we think is the right one to get there for an affordable cost," he continued.
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US astronomers looking for life in the solar system believe that Europa, which has an ocean, is much more promising than desert-covered Mars, which is currently the focus of the US government's attention [Credit: NASA]"
"Europa is the most promising in terms of habitability because of its relatively thin ice shelf and an ocean... And we know there are oxidants on the surface of Europa." At the request of NASA, a proposed mission to explore Europa was revised to significantly reduce the cost, the scientist told the media on the sidelines of an annual conference of the American Association for the Advancement of Science (AAAS) underway here.
As a result of this review, the JPL and the Applied Physics Laboratory at Johns Hopkins University in Maryland developed a new exploration project named Clipper with a total coast of two billion dollars minus the launch. Following the successful example of Cassini, a probe that explored Titan, a moon of Saturn, a spacecraft would orbit Jupiter and conduct numerous close flybys of Europa.
"That way we can get effectively global coverage of Europa by doing many many flybys," Pappalardo argued. "And that can do outstanding science - not quite as good as an orbiter, but not that bad - for half the cost, which is two billions dollars over the life of the mission excluding the launch."
If the plan is approved, Clipper could be launched by 2021 and take three to six years to reach Europa. By comparison, it takes six months to reach Mars.
But NASA already announced at the end of 2012 that there will be no funds for the Clipper mission in the current atmosphere of budgetary cuts, he said. A high scientific priority. However, the space agency announced in December that it was sending to Mars in 2020 a new robot similar to Curiosity, a project that cost an estimated 2.5 billion.
Curiosity, which arrived on the Red Planet in August 2012, is trying to find out whether life was possible on Mars in the past.
Under the current plans of robotic exploration, after the arrival of the probe Juno to Jupiter's orbit in 2016 and its planned crash a year later, the United States will no longer have probes in the distant reaches of the solar system.NASA could, however, participate in a mission to Jupiter by the European Space Agency (ESA) called "Jupiter Icy Moon Explorer," during which a spacecraft is expected to arrive to its destination around 2030.
Noting that Mars consumed most attention in the course of NASA's exploration of the solar system, Pappalardo said the agency should not ignore planets that have a high scientific priority.
In his view, life could have existed on Mars several billion years ago, but Europa could have life today.
"If Europa is the best place in the solar system after Earth to host life, Encelade (a Saturn Moon) is right up there as well," said Amanda Hendrix, a senior scientist at the Planetary Science Institute in Tucson, Arizona. "It has at least a subsurface sea, if not an ocean, and there is geological activity.
"It has heat at the south pole and is ejecting water particles in a geyser and other components in the south pole plume.
Europa was closely observed for the first time by the twin Voyager probes in 1979 and then, in more detail, by Galileo in the 1990s.
"Author: Jean-Louis Santini Source: AFP [February 17, 2013]"
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