This illustration shows NASA’s Dragonfly rotorcraft-lander approaching a site on Saturn’s exotic moon, Titan. Taking advantage of Titan’s dense atmosphere and low gravity, Dragonfly will explore dozens of locations across the icy world, sampling and measuring the compositions of Titan's organic surface materials to characterize the habitability of Titan’s environment and investigate the progression of prebiotic chemistry.
Titan's abundant complex carbon-rich chemistry, interior ocean, and past presence of liquid water on the surface make it an ideal destination to study prebiotic chemical processes and the potential habitability of an extraterrestrial environment.
DraMS will allow scientists back on Earth to remotely study the chemical makeup of the Titanian surface. “We want to know if the type of chemistry that could be important for early pre-biochemical systems on Earth is taking place on Titan,” explains Dr. Melissa Trainer of NASA’s Goddard Space Flight Center, Greenbelt, Maryland.
The colorful globe of Saturn's largest moon, Titan, passes in front of the planet and its rings in this true color snapshot from NASA's Cassini spacecraft.
Credits: NASA/JPL-Caltech/Space Science Institute
Trainer is a planetary scientist and astrobiologist who specializes in Titan and is one of the Dragonfly mission’s deputy principal investigators. She is also lead on the DraMS instrument, which will scan through measurements of samples from Titan’s surface material for evidence of prebiotic chemistry.
To accomplish this, the Dragonfly robotic rotorcraft will capitalize on Titan’s low gravity and dense atmosphere to fly between different points of interest on Titan’s surface, spread as far as several miles apart. This allows Dragonfly to relocate its entire suite of instruments to a new site when the previous one has been fully explored, and provides access to samples in environments with a variety of geologic histories.
At each site, samples less than a gram in size will be drilled out of the surface by the Drill for Acquisition of Complex Organics (DrACO) and brought inside the lander’s main body, to a place called the “attic” that houses the DraMS instrument. There, they will be irradiated by an onboard laser or vaporized in an oven to be measured by DraMS. A mass spectrometer is an instrument that analyzes the various chemical components of a sample by separating these components down into their base molecules and passing them through sensors for identification.
“DraMS is designed to look at the organic molecules that may be present on Titan, at their composition and distribution in different surface environments,” says Trainer. Organic molecules contain carbon and are used by all known forms of life. They are of interest in understanding the formation of life because they can be created by living and non-living processes.
Mass spectrometers determine what’s in a sample by ionizing the material (that is, bombarding it with energy so that the atoms therein become positively or negatively charged) and examining the chemical composition of the various compounds. This involves determining the relationship between the weight of the molecule and its charge, which serves as a signature for the compound.
DraMS was developed in part by the same team at Goddard which developed the Sample Analysis at Mars (SAM) instrument suite aboard the Curiosity rover. DraMS is designed to survey samples of Titanian surface material in situ, using techniques tested on Mars with the SAM suite.
Trainer emphasized the benefits of this heritage. Dragonfly’s scientists did not want to “reinvent the wheel” when it came to searching for organic compounds on Titan, and instead built on established methods which have been applied on Mars and elsewhere. “This design has given us an instrument that’s very flexible, that can adapt to the different types of surface samples,” says Trainer.
DraMS and other science instruments on Dragonfly are being designed and built under the direction of the Johns Hopkins Applied Physics Laboratory in Laurel, Maryland, which manages the mission for NASA and is designing and building the rotorcraft-lander. The team includes key partners at Goddard, the French space agency (CNES, Paris, France), which is providing the Gas Chromatograph Module for DraMS that will provide an additional separation after leaving the oven, Lockheed Martin Space, Littleton, Colorado, NASA Ames Research Center at Moffett Federal Airfield in California's Silicon Valley, NASA Langley Research Center, Hampton, Virginia, NASA Jet Propulsion Laboratory, Pasadena, California, Penn State University, State College, Pennsylvania, Malin Space Science Systems, San Diego, California, Honeybee Robotics, Brooklyn, New York, the German Aerospace Center (DLR), Cologne, Germany, and the Japan Aerospace Exploration Agency (JAXA), Tokyo, Japan.
Dragonfly is the fourth mission in NASA’s New Frontiers program. New Frontiers is managed by NASA's Marshall Space Flight Center in Huntsville, Alabama, for the agency's Science Mission Directorate Washington.
Quelle: NASA
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Upte:28.03.2023
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NASA’s Dragonfly Team Soars through Major Design Review
Before it can fly its revolutionary rotorcraft over the organic dunes of Saturn’s moon Titan, NASA’s Dragonfly mission team needs to navigate a series of independent reviews to demonstrate the flight project is on track.
Artist’s impression of the Dragonfly rotorcraft-lander on the surface of Titan, Saturn’s largest moon and a major target in NASA’s quest to assess habitability and search for potential signs of life beyond Earth on worlds across the solar system.
Credits: NASA/Johns Hopkins APL/Steve Gribben
Led by the Johns Hopkins Applied Physics Laboratory (APL) in Laurel, Maryland, the team recently crossed a major milestone on that path, successfully passing all the technical requirements and standards of the weeklong Preliminary Design Review (PDR) that wrapped up on March 3.
“I am very proud of the entire Dragonfly team,” said Bobby Braun, head of APL’s Space Exploration Sector. “APL, NASA’s Goddard Space Flight Center, Lockheed Martin, and all of our partners really came together to deliver a credible technical baseline. The fidelity and thought that went into each decision was clearly communicated and forms a solid foundation upon which the team can build.”
The PDR – a requirement for all NASA missions – covers topics such as spacecraft design, mission requirements, science plans, schedule, cost, and risk. Held at APL, which manages the mission and will build and operate the Dragonfly lander, the PDR included more than 60 presentations to a panel of external experts tasked with evaluating and assessing mission progress for NASA.
“I’m excited to see all of the Dragonfly mission's design components coming together,” said Lori Glaze, director of the Planetary Science Division at NASA Headquarters in Washington. “This mission team's hard work has resulted in the technical design for a spacecraft that can conduct compelling science to increase our understanding of Titan.”
NASA will consider the board’s findings in a confirmation review later this year, examining Dragonfly’s cost, schedule, and the recommended baseline plan forward.
Space Exploration Sector engineers (from left) John Samsock, Anthony Drewicz and Stephanie Lepchenske work with a test platform in the Dragonfly Flight Lab. The mission team is making progress on several technical aspects of Dragonfly, including the rotorcraft-lander’s flight and autonomy systems.
Credits: Johns Hopkins APL/Ed Whitman
“The team did a fantastic job,” said Dragonfly Principal Investigator Zibi Turtle, also of APL. “Everyone worked so hard to make sure the review board had a clear idea not just of the great progress we've made to close out the design but of our technical challenges, and how we plan to overcome them. We’re incredibly excited to have completed this step, and are ready to continue our work on the next phase of Dragonfly development -- including testing in the large Titan-environment chamber here at APL over the next year.”
Dragonfly centers on a game-changing approach to planetary exploration, employing a rotorcraft-lander to travel between and sample diverse sites on this mysterious world. Dragonfly will characterize the habitability of Titan's environment, investigate the progression of prebiotic chemistry in an environment where carbon-rich material and liquid water may have mixed for an extended period, and even search for chemical indications of whether water-based or hydrocarbon-based life once existed on Titan.
Dragonfly team members pause during the mission preliminary design review, held at the Johns Hopkins Applied Physics Laboratory in Laurel, Maryland, from Feb. 27-March 3. Many other team members attended the PDR virtually.
Credits: Johns Hopkins APL
Dragonfly is being designed and built under the direction of the Johns Hopkins Applied Physics Laboratory in Laurel, Maryland, which manages the Dragonfly mission for NASA. The team includes key partners at NASA’s Goddard Space Flight Center in Greenbelt, Maryland; Lockheed Martin Space in Littleton, Colorado; NASA’s Ames Research Center in Silicon Valley, California; NASA’s Langley Research Center in Hampton, Virginia; Penn State University in State College, Pennsylvania; Malin Space Science Systems in San Diego, California; Honeybee Robotics in Pasadena, California; NASA’s Jet Propulsion Laboratory in Southern California; the French space agency (CNES) in Paris; the German Aerospace Center (DLR) in Cologne, Germany; and the Japan Aerospace Exploration Agency (JAXA) in Tokyo. Dragonfly is the fourth mission in NASA's New Frontiers Program, managed by NASA's Marshall Space Flight Center in Huntsville, Alabama, for the agency's Science Mission Directorate in Washington.
Quelle: NASA
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Update: 30.11.2023
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NASA’s Dragonfly to Proceed with Final Mission Design Work
