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By NASA
Radioisotope Power Systems RPS Home About About RPS About the Program About Plutonium-238 Safety and Reliability For Mission Planners Contact Systems Overview Power Systems Thermal Systems Dynamic Radioisotope Power Missions Overview Timeline News Resources STEM Overview Power to Explore Contest Kid-Friendly Videos FAQ 5 Min Read After 60 Years, Nuclear Power for Spaceflight is Still Tried and True
Workers install one of three Radioisotope Thermoelectric Generators (RTGs) on the Cassini spacecraft. More › Credits:
NASA Editor’s Note: Originally published on June 21, 2021.
Six decades after the launch of the first nuclear-powered space mission, Transit IV-A, NASA is embarking on a bold future of human exploration and scientific discovery. This future builds on a proud history of safely launching and operating nuclear-powered missions in space.
“Nuclear power has opened the solar system to exploration, allowing us to observe and understand dark, distant planetary bodies that would otherwise be unreachable. And we’re just getting started,” said Dr. Thomas Zurbuchen, associate administrator for NASA’s Science Mission Directorate. “Future nuclear power and propulsion systems will help revolutionize our understanding of the solar system and beyond and play a crucial role in enabling long-term human missions to the Moon and Mars.”
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Space nuclear power to explore the deepest, dustiest, darkest, and most distant regions of our solar system and beyond. NASA From Humble Beginnings: Nuclear Power Spawns an Age of Scientific Discovery
On June 29, 1961, the John’s Hopkins University Applied Physics Laboratory launched the Transit IV-A Spacecraft. It was a U.S. Navy navigational satellite with a SNAP-3B radioisotope powered generator producing 2.7 watts of electrical power — about enough to light an LED bulb. Transit IV-A broke an APL mission-duration record and confirmed the Earth’s equator is elliptical. It also set the stage for ground-breaking missions that have extended humanity’s reach across the solar system.
Since 1961, NASA has flown more than 25 missions carrying a nuclear power system through a successful partnership with the Department of Energy (DOE), which provides the power systems and plutonium-238 fuel.
“The department and our national laboratory partners are honored to play a role in powering NASA’s space exploration activities,” said Tracey Bishop, deputy assistant secretary in DOE’s Office of Nuclear Energy. “Radioisotope Power Systems are a natural extension of our core mission to create technological solutions that meet the complex energy needs of space research, exploration, and innovation.”
There are only two practical ways to provide long-term electrical power in space: the light of the sun or heat from a nuclear source.
We couldn’t do the mission without it. No other technology exists to power a mission this far away from the Sun, even today.
Alan Stern
Principal Investigator, NASA’s New Horizons Mission to Pluto and Beyond
“As missions move farther away from the Sun to dark, dusty, and harsh environments, like Jupiter, Pluto, and Titan, they become impossible or extremely limited without nuclear power,” said Leonard Dudzinski, chief technologist for NASA’s Planetary Science Division and program executive for Radioisotope Power.
That’s where Radioisotope Power Systems, or RPS, come in. They are a category of power systems that convert heat generated by the decay of plutonium-238 fuel into electricity.
“These systems are reliable and efficient,” said June Zakrajsek, manager for NASA’s Radioisotope Power Systems Program office at Glenn Research Center in Cleveland. “They operate continuously over long-duration space missions regardless of sunlight, temperature, charged particle radiation, or surface conditions like thick clouds or dust. They’ve allowed us to explore from the Sun to Pluto and beyond.”
RPS powered the Apollo Lunar Surface Experiment Package. They’ve sustained Voyager 1 and 2 since 1977, and they kept Cassini-Huygens’ instruments warm as it explored frigid Saturn and its moon Titan.
Today, a Multi-Mission Thermoelectric Generator (MMRTG) powers the Perseverance rover, which is captivating the nation as it searches for signs of ancient life on Mars, and a single RTG is sustaining New Horizons as it ventures on its way out of the solar system 15 years after its launch.
“The RTG was and still is crucial to New Horizons,” said Alan Stern, New Horizons principal investigator from the Southwest Research Institute. “We couldn’t do the mission without it. No other technology exists to power a mission this far away from the Sun, even today.”
New Horizons carries seven scientific instruments and a radioisotope thermoelectric generator. The spacecraft weighs 1,060 pounds. NASA/JHUAPL Great Things to Come: Science and Human Exploration
Dragonfly, which is set to launch in 2028, is the next mission with plans to use an MMRTG. Part of NASA’s New Frontiers program, Dragonfly is an octocopter designed to explore and collect samples on Saturn’s largest moon, Titan, an ocean world with a dense, hazy atmosphere.
“RPS is really an enabling technology,” said APL’s Zibi Turtle, principal investigator for the upcoming Dragonfly mission. “Early missions like Voyager, Galileo, and Cassini that relied on RPS have completely changed our understanding and given us a geography of the distant solar system…Cassini gave us our first close-up look at the surface of Titan.”
According to Turtle, the MMRTG serves two purposes on Dragonfly: power output to charge the lander’s battery and waste heat to keep its instruments and electronics warm.
“Flight is a very high-power activity. We’ll use a battery for flight and science activities and recharge the battery using the MMRTG,” said Turtle. “The waste heat from the power system is a key aspect of our thermal design. The surface of Titan is very cold, but we can keep the interior of the lander warm and cozy using the heat from the MMRTG.”
As the scientific community continues to benefit from RPS, NASA’s Space Technology Mission Directorate is investing in new technology using reactors and low-enriched uranium fuel to enable a robust human presence on the Moon and eventually human missions to Mars.
Astronauts will need plentiful and continuous power to survive the long lunar nights and explore the dark craters on the Moon’s South Pole. A fission surface power system could provide enough juice to power robust operations. NASA is leading an effort, working with the DOE and industry to design a fission power system for a future lunar demonstration that will pave the way for base camps on the Moon and Mars.
NASA has also thought about viable ways to reduce the time it takes to travel to Mars, including nuclear propulsion systems.
As NASA advances its bold vision of exploration and scientific discovery in space, it benefits from 60 years of the safe use of nuclear power during spaceflight. Sixty years of enlightenment that all started with a little satellite called Transit IV-A.
News Media Contact
Jan Wittry
NASA’s Glenn Research Center
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By USH
The Colares UFO incidents refer to a series of unusual sightings and encounters that took place in 1977 on the Brazilian island of Colares. During this period, numerous residents from the Amazon River community of Colares reported being attacked by UFOs.
These mysterious objects allegedly descended from the sky, and in some cases, emerged from the water, emitting intense beams of light. The beams caused physical harm, including burn marks, puncture wounds, fatigue, and memory loss, affecting as many as 2,000 people.
In response to the alarming situation, the Brazilian Air Force initiated a thorough investigation. Years later, their findings were made public, revealing details of this bizarre chapter in UFO history.
Weaponized hosts Jeremy and George speak with Thiago Ticchetti, Brazil's leading UFO investigator and author, to discuss the Colares case and the once-classified military files.
According to Thiago, the Brazilian military captured remarkably clear film footage and photographs of the UFOs. However, he claims that this evidence was sent to the U.S. and has never been released to the public.
In this episode, they also explores various conspiracy theories and recent debunking efforts surrounding the topic of unidentified aerial phenomena (UAP).
The discussion on the Colares UFO incidents begins at the 37-minute mark in the video.
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By USH
In an article posted on January 27, 2018, we discussed Biological UFOs, showcasing many images of different types of biological entities such as zeroids, archons, ebani and flying rods.
Image shows some of the biological UFOs taken from our 2018 article
Now, the theory that some UFOs may be biological entities, which may populate the recesses of free space, possibly originating from another dimension, is not a new one.
Video on Youtube: Astronauts report squid-like entity floating in space
Jacques Vallée, a renowned computer scientist and ufologist, proposed a theory that UFOs and related phenomena might be manifestations of beings from other dimensions or parallel realities existing at different frequencies from our own.
These entities, according to Vallée, may not necessarily be extraterrestrial but could belong to a reality operating under different physical laws. This hypothesis suggests that the phenomenon of alien visitors might originate not from our physical reality or outer space but from alternate realities or parallel universes.
Video on Youtube: Possible biological UFO filmed from passenger plane
Possible biological UFO seen over Iraq
Analyst Bob Spearing of MUFON recently spilled the beans to Daily Mail about these mysterious aerial objects. MUFON has studied drawings and photographs dating back to the 1970s of "squid-like objects" floating in the sky
Image left: squid like entity spotted in Russia 1977 (credit MUFON)Image right: squid like entity spotted in Denmark 1975 (credit MUFON)
These bioforms, living beings, are not only floating in our sky but also for example orbiting the moon, potentially populating the recesses of free space and the cosmic void, remain a mystery.View the full article
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By European Space Agency
Image: The Copernicus Sentinel-2 mission takes us over a section of Italy’s heel in the southern part of the boot-shaped peninsula. View the full article
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By USH
The first video shows an unknown cylindrical object with rings hovering in the sky over Lucca, Italy. The sighting captured on February 18 2024 raises many questions as to what the object might have been.
The second video showcases yet another unidentified object in motion, captured during a flight from Florida to New York City on March 25, 2024. Resembling a classic flying saucer, this entity, akin to its counterpart over Lucca, Italy, lacks discernible propellers characteristic of drones or wings typical of aircraft, as well as visible propulsion systems.
While the allure of extraterrestrial origins persists, it's almost certain that most of the UFO sightings we seen in the sky nowadays is not alien but actually ours, covert, highly advanced technologies concealed within classified projects.
Organizations involved in these classified projects want to believe you that these objects are alien because allegations of an alien presence could provide cover for their clandestine operations employing advanced technologies.
Consequently, should governments and mainstream media begin espousing narratives of an alien threat, it's prudent to maintain a critical perspective. Much of the alleged information may be fabricated or distorted to serve motives such as a false flag operation by using these highly advanced technologies.
And if that happened they can blame it on the aliens.
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