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By European Space Agency
12 November 2024 marks the start of a new year on Mars. At exactly 10:32 CET/09:32 UTC on Earth, the Red Planet begins a new orbit around our Sun.
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By NASA
4 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
NASA’s Voyager 2 captured this image of Uranus while flying by the ice giant in 1986. New research using data from the mission shows a solar wind event took place during the flyby, leading to a mystery about the planet’s magnetosphere that now may be solved.NASA/JPL-Caltech NASA’s Voyager 2 flyby of Uranus decades ago shaped scientists’ understanding of the planet but also introduced unexplained oddities. A recent data dive has offered answers.
When NASA’s Voyager 2 spacecraft flew by Uranus in 1986, it provided scientists’ first — and, so far, only — close glimpse of this strange, sideways-rotating outer planet. Alongside the discovery of new moons and rings, baffling new mysteries confronted scientists. The energized particles around the planet defied their understanding of how magnetic fields work to trap particle radiation, and Uranus earned a reputation as an outlier in our solar system.
Now, new research analyzing the data collected during that flyby 38 years ago has found that the source of that particular mystery is a cosmic coincidence: It turns out that in the days just before Voyager 2’s flyby, the planet had been affected by an unusual kind of space weather that squashed the planet’s magnetic field, dramatically compressing Uranus’ magnetosphere.
“If Voyager 2 had arrived just a few days earlier, it would have observed a completely different magnetosphere at Uranus,” said Jamie Jasinski of NASA’s Jet Propulsion Laboratory in Southern California and lead author of the new work published in Nature Astronomy. “The spacecraft saw Uranus in conditions that only occur about 4% of the time.”
The first panel of this artist’s concept depicts how Uranus’s magnetosphere — its protective bubble — was behaving before the flyby of NASA’s Voyager 2. The second panel shows an unusual kind of solar weather was happening during the 1986 flyby, giving scientists a skewed view of the magnetosphere.NASA/JPL-Caltech Magnetospheres serve as protective bubbles around planets (including Earth) with magnetic cores and magnetic fields, shielding them from jets of ionized gas — or plasma — that stream out from the Sun in the solar wind. Learning more about how magnetospheres work is important for understanding our own planet, as well as those in seldom-visited corners of our solar system and beyond.
That’s why scientists were eager to study Uranus’ magnetosphere, and what they saw in the Voyager 2 data in 1986 flummoxed them. Inside the planet’s magnetosphere were electron radiation belts with an intensity second only to Jupiter’s notoriously brutal radiation belts. But there was apparently no source of energized particles to feed those active belts; in fact, the rest of Uranus’ magnetosphere was almost devoid of plasma.
The missing plasma also puzzled scientists because they knew that the five major Uranian moons in the magnetic bubble should have produced water ions, as icy moons around other outer planets do. They concluded that the moons must be inert with no ongoing activity.
Solving the Mystery
So why was no plasma observed, and what was happening to beef up the radiation belts? The new data analysis points to the solar wind. When plasma from the Sun pounded and compressed the magnetosphere, it likely drove plasma out of the system. The solar wind event also would have briefly intensified the dynamics of the magnetosphere, which would have fed the belts by injecting electrons into them.
The findings could be good news for those five major moons of Uranus: Some of them might be geologically active after all. With an explanation for the temporarily missing plasma, researchers say it’s plausible that the moons actually may have been spewing ions into the surrounding bubble all along.
Planetary scientists are focusing on bolstering their knowledge about the mysterious Uranus system, which the National Academies’ 2023 Planetary Science and Astrobiology Decadal Survey prioritized as a target for a future NASA mission.
JPL’s Linda Spilker was among the Voyager 2 mission scientists glued to the images and other data that flowed in during the Uranus flyby in 1986. She remembers the anticipation and excitement of the event, which changed how scientists thought about the Uranian system.
“The flyby was packed with surprises, and we were searching for an explanation of its unusual behavior. The magnetosphere Voyager 2 measured was only a snapshot in time,” said Spilker, who has returned to the iconic mission to lead its science team as project scientist. “This new work explains some of the apparent contradictions, and it will change our view of Uranus once again.”
Voyager 2, now in interstellar space, is almost 13 billion miles (21 billion kilometers) from Earth.
News Media Contacts
Karen Fox / Molly Wasser
NASA Headquarters, Washington
202-358-1600
karen.c.fox@nasa.gov / molly.l.wasser@nasa.gov
Gretchen McCartney
Jet Propulsion Laboratory, Pasadena, Calif.
818-393-6215
gretchen.p.mccartney@jpl.nasa.gov
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Last Updated Nov 11, 2024 Related Terms
Voyager 2 Heliophysics Jet Propulsion Laboratory Magnetosphere Solar Wind Uranus Uranus Moons Explore More
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By Space Force
The program acknowledges the Space Force mission and structure, which results in a unique demand on the force.
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By NASA
2 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
NASA logo In fiscal year 2023, NASA investments supported 66,208 jobs in the state of California, generated $18.5 billion in economic output and $1 billion in tax revenue to the state’s economy.
Overall, NASA generated an estimated $9.5 billion in federal, state, and local taxes throughout the United States.
NASA’s Armstrong Flight Research Center in Edwards, California is one of three NASA centers in the state that contributes to this economic achievement. The center supports critical research in sustainable flight, air mobility, and airborne science, reinforcing the region as a hub of aerospace innovation.
Most notably, NASA Armstrong plays a unique role in the Quesst mission and X-59 project, aimed at reducing the sonic booms into quieter “sonic thumps,” to change regulations impeding supersonic flight over land. Additionally, maturing key airframe technologies with the X-66 aircraft in the Sustainable Flight Demonstrator project which may influence the next generation single-aisle seat class airliner. The Center also supports the research of electric air taxis and drones to operate safely in the national airspace as well as supporting science aircraft for NASA’s Earth Science Mission.
NASA’s Moon to Mars campaign generated 16,129 jobs and $4.7 billion in economic output in California. Collaborations with contractors like Boeing and Lockheed Martin further extended these benefits by creating thousands of high-skilled jobs in the Antelope Valley and across the state.
NASA also fosters partnerships with educational institutions across the state, investing $39.5 million in universities to cultivate the next generation of aerospace innovators. These investments bring STEM opportunities to local communities and prepare students for careers in cutting-edge industries – adding to the agency’s most valuable asset, its workforce.
NASA embraces the challenges of exploring the unknown and making the impossible possible as we continue our global leadership in science, human spaceflight, aerospace innovation, and technology development, and support the U.S. economy and benefit all.
Read the full Economic Impact Report for Fiscal Year 2023.
-end-
Nicolas Cholula / Sarah Mann
NASA’s Armstrong Flight Research Center
661-714-3853 / 661-233-2758
nicolas.h.cholula@nasa.gov /sarah.mann@nasa.gov
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Last Updated Oct 24, 2024 EditorDede DiniusContactNicolas Cholulanicolas.h.cholula@nasa.govSarah Mannsarah.mann@nasa.govLocationArmstrong Flight Research Center Related Terms
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By NASA
NASA’s work, including its Moon to Mars exploration approach, is advancing science and technology for the Artemis Generation, while also driving significant economic growth across the United States, the agency announced Thursday.
In its third agencywide economic impact report, NASA highlighted how its Moon to Mars activities, climate change research and technology development, and other projects generated more than $75.6 billion in economic output across all 50 states and Washington, D.C., in fiscal year 2023.
“To invest in NASA is to invest in American workers, American innovation, the American economy, and American economic competitiveness,” says NASA Administrator Bill Nelson. “Our work doesn’t just expand our understanding of the universe — it fuels economic growth, inspires future generations, and improves our quality of life. As we embark on the next great chapter of exploration, we are proud to help power economic strength, job creation, scientific progress, and American leadership on Earth, in the skies, and in the stars.”
Combined, NASA’s missions supported 304,803 jobs nationwide, and generated an estimated $9.5 billion in federal, state, and local taxes throughout the United States.
The study found NASA’s Moon to Mars activities generated more than $23.8 billion in total economic output and supported an estimated 96,479 jobs nationwide. For investments in climate research and technology, the agency’s activities generated more than $7.9 billion in total economic output and supported an estimated 32,900 jobs in the U.S.
Additional key findings of the study include:
Every state in the country benefits economically through NASA activities. Forty-five states have an economic impact of more than $10 million. Of those 45 states, eight have an economic impact of $1 billion or more. The agency’s Moon to Mars initiative, which includes the Artemis missions, generated nearly $2.9 billion in tax revenue. These activities provided about 32% of NASA’s economic impact. The agency’s investments in climate change research and technology generated more than $1 billion in tax revenue. Approximately 11% of NASA’s economic impacts are attributable to its investments in climate change research and technology. NASA had more than 644 active international agreements for various scientific research and technology development activities in the 2023 fiscal year. The International Space Station, representing 15 countries and five space agencies, has a predominant role in the agency’s international partnerships. In fiscal year 2023, NASA oversaw 2,628 active domestic and international non-procurement partnership agreements, which included 629 new domestic and 109 new international agreements, active partnerships with 587 different non-federal partners across the U.S., and partnerships in 47 of 50 states. NASA Spinoffs, which are public products and processes that are developed with NASA technology, funding, or expertise, provide a benefit to American lives beyond dollars and jobs. As of result of NASA missions, our fiscal year 2023 tech transfer activities produced 1,564 new technology reports, 40 new patent applications, 69 patents issued, and established 5,277 software usage agreements. Scientific research and development, which fuels advancements in science and technology that can help improve daily life on Earth and for humanity, is the largest single-sector benefitting from NASA’s work, accounting for 19% of NASA’s total economic impact. The study was conducted by the Nathalie P. Voorhees Center for Neighborhood and Community Improvement at the University of Illinois at Chicago.
To review the full report, visit:
https://go.nasa.gov/3NEtUIq
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Meira Bernstein / Melissa Howell
Headquarters, Washington
202-615-1747 / 202-961-6602
meira.b.bernstein@nasa.gov / melissa.e.howell@nasa.gov
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Last Updated Oct 24, 2024 LocationNASA Headquarters View the full article
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