Members Can Post Anonymously On This Site
Tethered satellites for propulsion without fuel
-
Similar Topics
-
By European Space Agency
Last night a crucial step in the European Space Agency’s eclipse-making Proba-3 mission was completed: the two spacecraft, flying jointly since launch, have successfully separated. This leaves them ready to begin their cosmic dance in the world’s first-ever precision formation-flying mission.
View the full article
-
By NASA
2 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
Artist concept highlighting the novel approach proposed by the 2025 NIAC awarded selection of TOBIAS: Tethered Observatory for Balloon-based Imaging and Atmospheric Sampling concept.NASA/Ben Hockman Ben Hockman
NASA Jet Propulsion Laboratory
A basketball-sized towbody containing a camera, atmospheric sampling instruments, and support hardware is suspended on a multi-kilometer tether from a high-altitude balloon in the Venusian atmosphere, allowing it to peer beneath the dense cloud layer and image the surface at high resolution. The towbody harvests energy from the differential wind shear via an onboard wind turbine in order to power onboard instruments and active cooling system. Aerodynamic surfaces interacting with the relative wind shears of ~10 m/s allow the towbody to maintain stable pointing for imaging. This Phase I study will focus on four key feasibility aspects of the towbody system: (1) the tether system, including tether design, deployment system, and drag due to atmospheric wind shear, (2) towbody attitude stability, including its aerodynamic design and vibration suppression, (3) the power and thermal system for surviving the harsh Venusian atmosphere, and (4) the mission architecture and systems engineering aspects, particularly communications, towbody deployment, gondola interfaces, and the concept of operations. This “Tethered Observatory for Balloon-based Imaging and Atmospheric Sampling (TOBIAS)” would transform our understanding of the nature and evolution of Venus by enabling high resolution and spatial coverage nighttime IR imaging of surface geology, including active and past volcanism.
2025 Selections
Facebook logo @NASATechnology @NASA_Technology
Share
Details
Last Updated Jan 10, 2025 EditorLoura Hall Related Terms
NASA Innovative Advanced Concepts (NIAC) Program NIAC Studies Keep Exploring Discover More NIAC Topics
Space Technology Mission Directorate
NASA Innovative Advanced Concepts
NIAC Funded Studies
About NIAC
View the full article
-
By NASA
Modular Assembled Radiators for Nuclear Electric Propulsion Vehicles, or MARVL, aims to take a critical element of nuclear electric propulsion, its heat dissipation system, and divide it into smaller components that can be assembled robotically and autonomously in space. This is an artist’s rendering of what the fully assembled system might look like.NASA The trip to Mars and back is not one for the faint of heart. We’re not talking days, weeks, or months. But there are technologies that could help transport a crew on that round-trip journey in a relatively quick two years.
One option NASA is exploring is nuclear electric propulsion, which employs a nuclear reactor to generate electricity that ionizes, or positively charges, and electrically accelerates gaseous propellants to provide thrust to a spacecraft.
Researchers at NASA’s Langley Research Center in Hampton, Virginia, are working on a system that could help bring nuclear electric propulsion one significant, technology-defining step closer to reality.
Modular Assembled Radiators for Nuclear Electric Propulsion Vehicles, or MARVL, aims to take a critical element of nuclear electric propulsion, its heat dissipation system, and divide it into smaller components that can be assembled robotically and autonomously in space.
“By doing that, we eliminate trying to fit the whole system into one rocket fairing,” said Amanda Stark, a heat transfer engineer at NASA Langley and the principal investigator for MARVL. “In turn, that allows us to loosen up the design a little bit and really optimize it.”
Loosening up the design is key, because as Stark mentioned, previous ideas called for fitting the entire nuclear electric radiator system under a rocket fairing, or nose cone, which covers and protects a payload. Fully deployed, the heat dissipating radiator array would be roughly the size of a football field. You can imagine the challenge engineers would face in getting such a massive system folded up neatly inside the tip of a rocket.
The MARVL technology opens a world of possibilities. Rather than cram the whole system into an existing rocket, this would allow researchers the flexibility to send pieces of the system to space in whatever way would make the most sense, then have it all assembled off the planet.
Once in space, robots would connect the nuclear electric propulsion system’s radiator panels, through which a liquid metal coolant, such as a sodium-potassium alloy, would flow.
While this is still an engineering challenge, it is exactly the kind of engineering challenge in-space-assembly experts at NASA Langley have been working on for decades. The MARVL technology could mark a significant first milestone. Rather than being an add-on to an existing technology, the in-space assembly component will benefit and influence the design of the very spacecraft it would serve.
“Existing vehicles have not previously considered in-space assembly during the design process, so we have the opportunity here to say, ‘We’re going to build this vehicle in space. How do we do it? And what does the vehicle look like if we do that?’ I think it’s going to expand what we think of when it comes to nuclear propulsion,” said Julia Cline, a mentor for the project in NASA Langley’s Research Directorate, who led the center’s participation in the Nuclear Electric Propulsion tech maturation plan development as a precursor to MARVL. That tech maturation plan was run out of the agency’s Space Nuclear Propulsion project at Marshall Space Flight Center in Huntsville, Alabama.
NASA’s Space Technology Mission Directorate awarded the MARVL project through the Early Career Initiative, giving the team two years to advance the concept. Stark and her teammates are working with an external partner, Boyd Lancaster, Inc., to develop the thermal management system. The team also includes radiator design engineers from NASA’s Glenn Research Center in Cleveland and fluid engineers from NASA’s Kennedy Space Center in Florida. After two years, the team hopes to move the MARVL design to a small-scale ground demonstration.
The idea of robotically building a nuclear propulsion system in space is sparking imaginations.
“One of our mentors remarked, ‘This is why I wanted to work at NASA, for projects like this,’” said Stark, “which is awesome because I am so happy to be involved with it, and I feel the same way.”
Additional support for MARVL comes from the agency’s Space Nuclear Propulsion project. The project’s ongoing effort is maturing technologies for operations around the Moon and near-Earth exploration, deep space science missions, and human exploration using nuclear electric propulsion and nuclear thermal propulsion.
An artist’s rendering that shows the different components of a fully assembled nuclear electric propulsion system.NASAView the full article
-
By USH
The ongoing mystery surrounding recent drone sightings has become increasingly complex, with conflicting reports making it difficult to draw definitive conclusions. However, a new and intriguing element has emerged alongside these drones sightings: numerous accounts of mysterious orbs, potentially of alien origin, flying at both low and high altitudes.
Reports of mysterious orbs have been increasing in recent weeks. These orbs have been sighted at both high altitudes and closer to urban areas.
Orb sighting over New Jersey on December 17, 2024Watch video UFO Sightings Daily
Pilots have reported encounters to air traffic control. Listen to conversations between pilots and traffic control.
And a passenger aboard United Airlines flight UA2359 from Chicago to Newark recently captured footage of these mysterious orbs. The video, shared online by the user “EasilyAmusedEE” on December 16, 2024, shows objects at altitudes between 40,000 and 50,000 feet—far beyond the capabilities of consumer drones. The footage was reportedly taken using an iPhone 16 Pro Max.
Video plane passenger films unknown orbs.
About the drone sightings: Meanwhile, eyewitness accounts describe these so-called drones as crafts that emit no noise, suggesting advanced technology. Additionally, there are claims that these crafts seem to intentionally draw attention, as they have reportedly interfered with cars (lamps flickering), electronics, streetlights (lamps flickering), and even fully charged batteries, which are said to be instantly drained in their presence.
Video shows among other (drone/orb) sightings, cars lamps flickering, streetlights lamps flickering, fully charged batteries drained.
This surge in Orb sightings raises more questions. Are these orbs extraterrestrial in origin? Could they be deliberately associated with the drone phenomena, or is their timing coincidental? Some suggest the possibility of a false flag operation, hinting at a deeper and potentially misleading agenda by the U.S. government.
Whether these drones and Orbs sightings point to advanced human technology, extraterrestrial activity, or a mix of both, one thing is clear: there is something significant going on.View the full article
-
By European Space Agency
A multi-orbit constellation of about 300 satellites that will deliver resilient, secure and fast communications for EU governments, European companies and citizens will be put in orbit after two contracts were confirmed today in Brussels.
View the full article
-
-
Check out these Videos
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.