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By NASA
6 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
NASA instruments and aircraft are helping identify potential sources of critical minerals across vast swaths of California, Nevada, and other Western states. Pilots gear up to reach altitudes about twice as high as those of a cruising passenger jet.NASA NASA and the U.S. Geological Survey have been mapping the planets since Apollo. One team is searching closer to home for minerals critical to national security and the economy.
If not for the Joshua trees, the tan hills of Cuprite, Nevada, would resemble Mars. Scalded and chemically altered by water from deep underground, the rocks here are earthly analogs for understanding ancient Martian geology. The hills are also rich with minerals. They’ve lured prospectors for more than 100 years and made Cuprite an ideal place to test NASA technology designed to map the minerals, craters, crusts, and ices of our solar system.
Sensors that discovered lunar water, charted Saturn’s moons, even investigated ground zero in New York City were all tested and calibrated at Cuprite, said Robert Green, a senior research scientist at NASA’s Jet Propulsion Laboratory in Southern California. He’s honed instruments in Nevada for decades.
One of Green’s latest projects is to find and map rocky surfaces in the American West that could contain minerals crucial to the nation’s economy and security. Currently, the U.S. is dependent on imports of 50 critical minerals, which include lithium and rare earth elements used in everything from rechargeable batteries to medicine.
Scientists from the U.S. Geological Survey (USGS) are searching nationwide for domestic sources. NASA is contributing to this effort with high-altitude aircraft and sensors capable of detecting the molecular fingerprints of minerals across vast, treeless expanses in wavelengths of light not visible to human eyes.
The hills of Cuprite, Nevada, appear pink and tan to the eye (top image) but they shine with mica, gypsum, and alunite among other types of minerals when imaged spectroscopically (lower image). NASA sensors used to study Earth and other rocky worlds have been tested there.USGS/Ray Kokaly The collaboration is called GEMx, the Geological Earth Mapping Experiment, and it’s likely the largest airborne spectroscopic survey in U.S. history. Since 2023, scientists working on GEMx have charted more than 190,000 square miles (500,000 square kilometers) of North American soil.
Mapping Partnership Started During Apollo
As NASA instruments fly in aircraft 60,000 feet (18,000 meters) overhead, Todd Hoefen, a geophysicist, and his colleagues from USGS work below. The samples of rock they test and collect in the field are crucial to ensuring that the airborne observations match reality on the ground and are not skewed by the intervening atmosphere.
The GEMx mission marks the latest in a long history of partnerships between NASA and USGS. The two agencies have worked together to map rocky worlds — and keep astronauts and rovers safe — since the early days of the space race.
For example, geologic maps of the Moon made in the early 1960s at the USGS Astrogeology Science Center in Flagstaff, Arizona, helped Apollo mission planners select safe and scientifically promising sites for the six crewed landings that occurred from 1969 to 1972. Before stepping onto the lunar surface, NASA’s Moon-bound astronauts traveled to Flagstaff to practice fieldwork with USGS geologists. A version of those Apollo boot camps continues today with astronauts and scientists involved in NASA’s Artemis mission.
Geophysicist Raymond Kokaly, who leads the GEMx campaign for USGS, is pictured here conducting ground-based hyperspectral imaging of rock in Cuprite, Nevada, in April 2019.USGS/Todd Hoefen The GEMx mission marks the latest in a long history of partnerships between NASA and USGS. The two agencies have worked together to map rocky worlds — and keep astronauts and rovers safe — since the early days of the space race.
Rainbows and Rocks
To detect minerals and other compounds on the surfaces of rocky bodies across the solar system, including Earth, scientists use a technology pioneered by JPL in the 1980s called imaging spectroscopy. One of the original imaging spectrometers built by Robert Green and his team is central to the GEMx campaign in the Western U.S.
About the size and weight of a minifridge and built to fly on planes, the instrument is called AVIRIS-Classic, short for Airborne Visible/Infrared Imaging Spectrometer. Like all imaging spectrometers, it takes advantage of the fact that every molecule reflects and absorbs light in a unique pattern, like a fingerprint. Spectrometers detect these molecular fingerprints in the light bouncing off or emitted from a sample or a surface.
In the case of GEMx, that’s sunlight shimmering off different kinds of rocks.
Compared to a standard digital camera, which “sees” three color channels (red, green, and blue), imaging spectrometers can see more than 200 channels, including infrared wavelengths of light that are invisible to the human eye.
NASA spectrometers have orbited or flown by every major rocky body in our solar system. They’ve helped scientists investigate methane lakes on Titan, Saturn’s largest moon, and study Pluto’s thin atmosphere. One JPL-built spectrometer is currently en route to Europa, an icy moon of Jupiter, to help search for chemical ingredients necessary to support life.
“One of the cool things about NASA is that we develop technology to look out at the solar system and beyond, but we also turn around and look back down,” said Ben Phillips, a longtime NASA program manager who led GEMx until he retired in 2025.
The Newest Instrument
More than 200 hours of GEMx flights are scheduled through fall 2025. Scientists will process and validate the data, with the first USGS mineral maps to follow. During these flights, an ER-2 research aircraft from NASA’s Armstrong Flight Research Center in Edwards, California, will cruise over the Western U.S. at altitudes twice as high as a passenger jet flies.
At such high altitudes, pilot Dean Neeley must wear a spacesuit similar to those used by astronauts. He flies solo in the cramped cockpit but will be accompanied by state-of-the-art NASA instruments. In the belly of the plane rides AVIRIS-Classic, which will be retiring soon after more than three decades in service. Carefully packed in the plane’s nose is its successor: AVIRIS-5, taking flight for the first time in 2025.
Together, the two instruments provide 10 times the performance of the older spectrometer alone, but even by itself AVIRIS-5 marks a leap forward. It can sample areas ranging from about 30 feet (10 meters) to less than a foot (30 centimeters).
“The newest generation of AVIRIS will more than live up to the original,” Green said.
More About GEMx
The GEMx research project will last four years and is funded by the USGS Earth Mapping Resources Initiative. The initiative will capitalize on both the technology developed by NASA for spectroscopic imaging, as well as the agency’s expertise in analyzing the datasets and extracting critical mineral information from them.
Data collected by GEMx is available here.
News Media Contacts
Andrew Wang / Jane J. Lee
Jet Propulsion Laboratory, Pasadena, Calif.
626-379-6874 / 818-354-0307
andrew.wang@jpl.nasa.gov / jane.j.lee@jpl.nasa.gov
Karen Fox / Elizabeth Vlock
NASA Headquarters, Washington
202-358-1600
karen.c.fox@nasa.gov / elizabeth.a.vlock@nasa.gov
Written by Sally Younger
2025-086
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Last Updated Jul 10, 2025 Related Terms
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By USH
The photograph was captured by the Mast Camera (Mastcam) aboard NASA’s Curiosity rover on Sol 3551 (August 2, 2022, at 20:43:28 UTC).
What stands out in the image are two objects, that appear strikingly out of place amid the natural Martian landscape of rocks and boulders. Their sharp edges, right angles, flat surfaces, and geometric symmetry suggest they may have been shaped by advanced cutting tools rather than natural erosion.
Could these ancient remnants be part of a destroyed structure or sculpture? If so, they may serve as yet another piece of evidence pointing to the possibility that Mars was once home to an intelligent civilization, perhaps even the advanced humanoid beings who, according to some theories, fled the catastrophic destruction of planet Maldek and sought refuge on the Red Planet.
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For the first time, two spacecraft in orbit were aligned in formation with millimetre precision and maintained their relative position for several hours without any control from the ground.
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By NASA
4 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
Researchers use a flat aerogel array antenna to communicate with a geostationary satellite above the Earth during tests at NASA’s Glenn Research Center in Cleveland.Credit: NASA/Jordan Cochran NASA engineers are using one of the world’s lightest solid materials to construct an antenna that could be embedded into the skin of an aircraft, creating a more aerodynamic and reliable communication solution for drones and other future air transportation options.
Developed by NASA, this ultra-lightweight aerogel antenna is designed to enable satellite communications where power and space are limited. The aerogel is made up of flexible, high-performance plastics known as polymers. The design features high air content (95%) and offers a combination of light weight and strength. Researchers can adjust its properties to achieve either the flexibility of plastic wrap or the rigidity of plexiglass.
“By removing the liquid portion of a gel, you’re left with this incredibly porous structure,” said Stephanie Vivod, a chemical engineer at NASA’s Glenn Research Center in Cleveland. “If you’ve ever made Jell-O, you’ve performed chemistry that’s similar to the first step of making an aerogel.”
NASA sandwiched a layer of aerogel between a small circuit board and an array of thin, circular copper cells, then topped the design off with a type of film known for its electrical insulation properties. This innovation is known at NASA and in the aviation community as an active phased array aerogel antenna.
A sample of aerogel is folded to demonstrate its flexibility during testing at NASA’s Glenn Research Center in Cleveland.Credit: NASA In addition to decreasing drag by conforming to the shape of aircraft, aerogel antennas save weight and space and come with the ability to adjust their individual array elements to reduce signal interference. They are also less visually intrusive compared to other types of antennas, such as spikes and blades. The finished product looks like a honeycomb but lays flat on an aircraft’s surface.
In the summer of 2024, researchers tested a rigid version of the antenna on a Britten-Norman Defender aircraft during an in-flight demonstration with the U.S. Navy at Naval Air Station Patuxent River in Maryland.
A Britten-Norman Defender aircraft outfitted with an advanced phased array antenna prototype for a flight test in summer 2024. The aircraft was used to verify data transmission quality and communications link resiliency with a low Earth orbit satellite.Credit: U.S. Navy Then, last October, researchers at NASA Glenn and the satellite communications firm Eutelsat America Corp., of Houston, began ground testing a version of the antenna mounted to a platform. The team successfully connected with a Eutelsat satellite in geostationary orbit, which bounced a signal back down to a satellite dish on a building at Glenn. Other demonstrations of the system at Glenn connected with a constellation of communications satellites operated in low Earth orbit by the data relay company Kepler. NASA researchers will design, build, and test a flexible version of the antenna later this year.
“This is significant because we are able to use the same antenna to connect with two very different satellite systems,” said Glenn researcher Bryan Schoenholz. Low Earth orbit satellites are relatively close – at 1,200 miles from the surface – and move quickly around the planet. Geostationary satellites are much farther – more than 22,000 miles from the surface – but orbit at speeds matching the Earth’s rotation, so they appear to remain in a fixed position above the equator.
NASA Glenn Research Center’s Sarah Dever and Mick Koch, electrical engineers, command an active phased array antenna to point toward a geostationary satellite. They used a flat version of an aerogel antenna during tests in October 2024.Credit: NASA/Jordan Cochran The satellite testing was crucial for analyzing the aerogel antenna concept’s potential real-world applications. When modern aircraft communicate with stations on the ground, those signals are often transmitted through satellite relays, which can come with delays and loss of communication. This NASA-developed technology will make sure these satellite links are not disrupted during flight as the aerogel antenna’s beam is a concentrated flow of radio waves that can be electronically steered with precision to maintain the connection.
As new types of air transportation options are brought to the market and U.S airspace – from the small, piloted aircraft of today to the autonomous air taxis and delivery drones of tomorrow – these kinds of steady connections will become increasingly important. That’s why NASA’s Advanced Air Mobility mission and Transformative Aeronautics Concepts program are supporting research like the aerogel antennas that can boost industry efforts to safely expand the emerging marketplace for these transportation systems.
“If an autonomous air taxi or drone flight loses its communications link, we have a very unsafe situation,” Schoenholz said. “We can’t afford a ‘dropped call’ up there because that connection is critical to the safety of the flight.”
Schoenholz, Vivod, and others work on NASA’s Antenna Deployment and Optimization Technologies activity within the Transformational Tools and Technologies project. The activity aims to develop technologies that reduce the risk of radio frequency interference from air taxis, drones, commercial passenger jets, and other aircraft in increasingly crowded airspace.
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By NASA
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Preparations for Next Moonwalk Simulations Underway (and Underwater)
Advanced Capabilities for Emergency Response Operations (ACERO) researchers Lynne Martin, left, and Connie Brasil use the Portable Airspace Management System (PAMS) to view a simulated fire zone and set a drone flight plan during a flight test the week of March 17, 2025.NASA/Brandon Torres-Navarrete NASA researchers conducted initial validation of a new airspace management system designed to enable crews to use aircraft fight and monitor wildland fires 24 hours a day, even during low-visibility conditions.
From March 17-28, NASA’s Advanced Capabilities for Emergency Response Operations (ACERO) project stationed researchers at multiple strategic locations across the foothills of the Sierra de Salinas mountains in Monterey County, California. Their mission: to test and validate a new, portable system that can provide reliable airspace management under poor visual conditions, one of the biggest barriers for aerial wildland firefighting support.
The mission was a success.
“At NASA, we have decades of experience leveraging our aviation expertise in ways that improve everyday life for Americans,” said Carol Carroll, deputy associate administrator for NASA’s Aeronautics Research Mission Directorate at agency headquarters in Washington. “We need every advantage possible when it comes to saving lives and property when wildfires affect our communities, and ACERO technology will give responders critical new tools to monitor and fight fires.”
NASA ACERO researchers Samuel Zuniga,left, and Jonathan La Plain prepare for a drone flight test using the PAMS in Salinas on March 19, 2025.NASA/Brandon Torres-Navarrete One of the barriers for continued monitoring, suppression, and logistics support in wildland fire situations is a lack of tools for managing airspace and air traffic that can support operations under all visibility conditions. Current aerial firefighting operations are limited to times with clear visibility when a Tactical Air Group Supervisor or “air boss” in a piloted aircraft can provide direction. Otherwise, pilots may risk collisions.
The ACERO technology will provide that air boss capability for remotely piloted aircraft operations – and users will be able to do it from the ground. The project’s Portable Airspace Management System (PAMS) is a suitcase-sized solution that builds on decades of NASA air traffic and airspace management research. The PAMS units will allow pilots to view the locations and operational intents of other aircraft, even in thick smoke or at night.
During the testing in Salinas, researchers evaluated the PAMS’ core airspace management functions, including strategic coordination and the ability to automatically alert pilots once their aircrafts exit their preapproved paths or the simulated preapproved fire operation zone.
Using the PAMS prototype, researchers were able to safely conduct flight operations of a vertical takeoff and landing aircraft operated by Overwatch Aero, LLC, of Solvang, California, and two small NASA drones.
Flying as if responding to a wildfire scenario, the Overwatch aircraft connected with two PAMS units in different locations. Though the systems were separated by mountains and valleys with weak cellular service, the PAMS units were able to successfully share and display a simulated fire zone, aircraft location, flight plans, and flight intent, thanks to a radio communications relay established by the Overwatch aircraft.
Operating in a rural mountain range validated that PAMS could work successfully in an actual wildland fire environment.
“Testing in real mountainous environments presents numerous challenges, but it offers significantly more value than lab-based testing,” said Dr. Min Xue, ACERO project manager at NASA’s Ames Research Center in California’s Silicon Valley. “The tests were successful, providing valuable insights and highlighting areas for future improvement.”
NASA ACERO researchers fly a drone to test the PAMS during a flight test on March 19, 2025.NASA/Brandon Torres-Navarrete Pilots on the ground used PAMS to coordinate the drones, which performed flights simulating aerial ignition – the practice of setting controlled, intentional fires to manage vegetation, helping to control fires and reduce wildland fire risk.
As a part of the testing, Joby Aviation of Santa Cruz, California, flew its remotely piloted aircraft, similar in size to a Cessna Grand Caravan, over the testing site. The PAMS system successfully exchanged aircraft location and flight intent with Joby’s mission management system. The test marked the first successful interaction between PAMS and an optionally piloted aircraft.
Fire chiefs from the California Department of Forestry and Fire Protection (CAL FIRE) attended the testing and provided feedback on the system’s functionality, features that could improve wildland fire air traffic coordination, and potential for integration into operations.
“We appreciate the work being done by the NASA ACERO program in relation to portable airspace management capabilities,” said Marcus Hernandez, deputy chief for CAL FIRE’s Office of Wildfire Technology. “It’s great to see federal, state, and local agencies, as it is important to address safety and regulatory challenges alongside technological advancements.”
ACERO chief engineer Joey Mercer, right, shows the Portable Airspace Management System (PAMS) to Cal Fire representatives Scott Eckman, center, and Pete York, left, in preparation for the launch of the Overwatch Aero FVR90 Vertical Take Off and Landing (VTOL) test “fire” information sharing, airspace management, communication relay, and aircraft deconfliction capabilities during the Advanced Capabilities for Emergency Response Operations (ACERO) test in Salinas, California.NASA/Brandon Torres-Navarrete These latest flights build on successful PAMS testing in Watsonville, California, in November 2024. ACERO will use flight test data and feedback from wildland fire agencies to continue building out PAMS capabilities and will showcase more robust information-sharing capabilities in the coming years.
NASA’s goal for ACERO is to validate this technology, so it can be developed for wildland fire crews to use in the field, saving lives and property. The project is managed by NASA’s Airspace Operations and Safety Program and supports the agency’s Advanced Air Mobility mission.
ACERO’s PAMS unit shown during a flight test on March 19, 2025NASA/Brandon Torres-Navarrette Share
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Last Updated Mar 25, 2025 Related Terms
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