Feed aggregator

NASA's Juno probe continues to give us more insight into Jupiter and the giant planet's moons, including Io, the most volcanically active object in the solar system.

NASA is building a moonquake detector for its upcoming Artemis 3 mission, in hopes of learning more about lunar tremors and the internal structure of the moon.

Matevž Frangež, State Secretary, Ministry of Economy, Tourism, and Sport signs the Artemis Accords on behalf of Slovenia with NASA astronaut Randy Bresnik, Ambassador Jamie L. Harpootlian, Rebecca Bresnik, Associate General Counsel for International and Space Law, and Slovenian Ambassador to the United States Iztok Mirošič standing behind. Credit: State Department

NASA and Slovenia affirmed their cooperation in future space endeavors on Friday as Slovenia became the 39th country to sign the Artemis Accords. The signing certified Slovenia’s commitment to pursue safe and sustainable exploration of space for the benefit of humanity and took place during a U.S.-Slovenia strategic dialogue in Ljubljana, Slovenia, at the Ministry of Foreign Affairs Offices.

“NASA welcomes Slovenia to the Artemis Accords,” said NASA Administrator Bill Nelson. “Today, the partnership between the United States and Slovenia crosses a new frontier. We live in a golden era of exploring the stars. That era will be written by nations that explore the cosmos openly, responsibly, and in peace.” 

State Secretary Matevž Frangež of the Ministry of the Economy, Tourism, and Sport signed the Accords on behalf of Slovenia, with James O’Brien, Assistant Secretary of State for European and Eurasian Affairs, participating in the signing event.

“Slovenia joins the principles, values, and rules on the peaceful use of space as a common good of humanity,” Frangež said.

Rebecca Bresnik, Associate General Counsel for International and Space Law, served as the senior NASA official at the ceremony, along with her husband, Randy Bresnik, who is a NASA astronaut of Slovenian descent.

“We are delighted to welcome Slovenia to the Artemis Accords family,” said Ambassador Jamie Harpootlian, the U.S. ambassador to Slovenia “We recognize Slovenia as a rising leader in space. We look forward to taking our collaborations with Slovenia on science, technology, and innovation to new frontiers.”

In 2020, the United States and seven other countries established the Artemis Accords to establish guidelines for the peaceful exploration and use of outer space. The Accords reinforce and implement key obligations in the 1967 Outer Space Treaty. They also strengthen the commitment by the United States and signatory nations to the Registration Convention, the Rescue and Return Agreement, as well as best practices NASA and its partners support, including the public release of scientific data.

Learn more about the Artemis Accords at:

https://www.nasa.gov/artemis-accords

-end-

Lauren Low
Headquarters, Washington
202-358-1600
lauren.e.low@nasa.gov

Share

Details Last Updated Apr 19, 2024 LocationNASA Headquarters Related Terms

• Artemis
• Artemis Accords
• Office of International and Interagency Relations (OIIR)
• Opportunities For International Participants to Get Involved

It can be difficult to figure out how to move a spacecraft from one orbit to another, but a trick from knot theory can help find spots where shifting orbits becomes easy

2 min read

Preparations for Next Moonwalk Simulations Underway (and Underwater) A beaver family nibbles on aspen branches just up Logan Canyon from Utah State University, in Spawn Creek, Utah. Credit: Sarah Koenigsberg

Humans aren’t the only mammals working to mitigate the effects of climate change in the Western United States. People there are also enlisting the aid of nature’s most prolific engineers – beavers. Using NASA-provided grants, two open-source programs from Boise State University in Idaho and Utah State University in Logan are making it possible for ranchers, land trust managers, nonprofits, and others to attract beavers to areas that need their help.

The Beaver Restoration Assessment Tool (BRAT) created by Utah State University uses data from satellites built at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, to identify areas that need restoration and would benefit from beavers’ dam-building abilities. The Boise State University Mesic Resource Restoration Monitoring Aid (MRRMaid) program, which also uses satellite data, monitors the areas over time. Both efforts are also supported by NASA’s Research Opportunities in Space and Earth Science program and the agency’s Applied Sciences’ Ecological Conservation program.

Once a site is chosen, program staffers and landowners begin to take measures to attract beavers, or the teams may relocate them from other areas. Either way, once on site, these semiaquatic builders get to work building and maintaining dams to create the ponds. The ponds help to retain water, including runoff from snowmelt and rainstorms, that would otherwise rush through the area, causing erosion and degrading the surrounding ecosystems.

Over time, these new ponds raise the water table, support wetlands that attract more wildlife and fish, and restore native plants to the ecosystem. Beaver dams can help ranchers improve water availability on their property, supporting their operations.

NASA Landsat data helps Utah State University identify streams where beavers can be reintroduced to help improve an ecosystem. Boise State University also uses Landsat data to show just how much beavers help. The vegetation in this satellite image indicates where streams or creeks are flowing and reveals the benefits of beaver activity.Credit: NASA

In addition to being beautiful and supporting the local ecology, these moisture-rich environments can limit wildfire damage with a barrier of healthy vegetation resistant to burning. When human infrastructure is nearby, a built-in leak or other interventions by humans can be added to control the water level, preventing floods that cause property damage.

As a restoration site’s health improves, MRRMaid and BRAT use NASA satellite data to monitor those changes and analyze how the beavers benefit the ecosystem in drought-stricken areas. Community leaders can use this information and the living examples of restored sites to build new parks and recreational areas and plan future restoration projects with their furry collaborators.

Read More

For more information on beaver rewilding, visit:

https://www.nasa.gov/missions/landsat/researchers-become-beaver-believers-after-measuring-the-impacts-of-rewilding/

Share

Details Last Updated Apr 19, 2024 Related Terms

• Technology Transfer & Spinoffs
• Climate Change
• Earth
• Goddard Space Flight Center
• Spinoffs
• Technology Transfer

Explore More 6 min read NASA Selects New Aircraft-Driven Studies of Earth and Climate Change

NASA has selected six new airborne missions that include domestic and international studies of fire-induced…

Article 5 hours ago 2 min read Hubble Captures a Bright Galactic and Stellar Duo

This image from the NASA/ESA Hubble Space Telescope features NGC 3783, a bright barred spiral galaxy about…

Article 6 hours ago 4 min read Students Celebrate Rockets, Environment at NASA’s Kennedy Space Center Article 7 hours ago Keep Exploring Discover Related Topics

Earth Observations

Earth Day News and Articles

Climate Change

Solar System

This image from NASA’s James Webb Space Telescope’s NIRCam (Near-Infrared Camera) of star-forming region NGC 604 shows how stellar winds from bright, hot young stars carve out cavities in surrounding gas and dust.

This image from NASA’s James Webb Space Telescope’s NIRCam (Near-Infrared Camera) of star-forming region NGC 604 shows how stellar winds from bright, hot young stars carve out cavities in surrounding gas and dust.NASA, ESA, CSA, STScI

In this image released on March 9, 2024, the NIRCam (Near-Infrared Camera) on NASA’s James Webb Space Telescope gives us a more detailed view of a well-studied but still mysterious region, NGC 604. The most noticeable features are tendrils and clumps of emission that appear bright red, extending out from areas that look like clearings, or large bubbles in the nebula. Stellar winds from the brightest and hottest young stars have carved out these cavities, while ultraviolet radiation ionizes the surrounding gas. This ionized hydrogen appears as a white and blue ghostly glow.

Learn more about this image and another of the same region from Webb’s MIRI (Mid-Infrared Instrument).

Image Credit: NASA, ESA, CSA, STScI

NASA's history-making Ingenuity helicopter covered a lot of ground on Mars over the past three years, as a new video shows.

Purple may be a likely color for extraterrestrial organisms, research suggests

Carbon storage calculations don’t always take into account the effects of animals – when they eat, defecate and die, they help store lots of carbon

The mission aims to assist the later removal of spunk junk, an issue that threatens the sustainable use of orbital space above the Earth.

By measuring how birds’ vocal muscles move while they are asleep and using a physical model for how those muscles produce sound, researchers have pulled songs from the minds of sleeping birds

Fossils and stone tools show that a cave in Saudi Arabia has been used as shelter by humans for millennia, up to the present day

Artist’s rendering of remotely piloted aircraft providing fire suppression, monitoring and communications capabilities during a wildland fire.NASA

NASA and the Federal Aviation Administration (FAA) have established a research transition team to guide the development of wildland fire technology. 

Wildland fires are occurring more frequently and at a larger scale than in past decades, according to the U.S. Forest Service. Emergency responders will need a broader set of technologies to prevent, monitor, and fight these growing fires more effectively. Under this Wildland Fire Airspace Operations research transition team, NASA and the FAA will develop concepts and test new technologies to improve airspace integration. 

Current aerial firefighting operations are limited to times when aircraft have clear visibility – otherwise pilots run the risk of flying into terrain or colliding with other aircraft. Drones could overcome this limitation by enabling responders to remotely monitor and suppress these fires during nighttime and low visibility conditions, such as periods of heavy smoke. However, advanced airspace management technologies are needed to enable these uncrewed aircraft to stay safely separated and allow aircraft operators to maintain situational awareness during wildland fire management response operations. 

Over the next four years, NASA’s Advanced Capabilities for Emergency Response Operations (ACERO) project, in collaboration with the FAA, will work to develop new airspace access and traffic management concepts and technologies to support wildland fire operations. These advancements will help inform a concept of operations for the future of wildland fire management under development by NASA and other government agencies. The team will test and validate uncrewed aircraft technologies for use by commercial industry and government agencies, paving the way for integrating them into future wildland fire operations.  

ACERO is led out of NASA’s Ames Research Center in Silicon Valley under the agency’s Aeronautics Research Mission Directorate. 

The state supreme courts in Florida and Arizona both recently ruled that strict abortion bans could go into effect. But ballot measures may give voters a chance to weigh in

This NASA space-based observatory video shows 'Devil Comet' 12P/Pons-Brooks passing past bright Jupiter while the sun explodes in the distance.

Japan will test solar power transmission from space in 2025 with a miniature space-based photoelectric plant that will wirelessly transmit energy from low Earth orbit to Earth.

Many researchers think that Wegovy and Ozempic should be taken for life, but myriad factors can force people off the drugs

Three types of misinformation are being used against transgender people: oversimplifying scientific knowledge, fabricating and misinterpreting research and promoting false equivalences

Untangling what happened in our Solar System tens or hundreds of millions of years ago is challenging. Millions of objects of wildly different masses interacted for billions of years, seeking natural stability. But its history—including the migration of the giant planets—explains what we see today in our Solar System and maybe in other, distant solar systems.

New research shows that giant planet migration began shortly after the Solar System formed.

Planetary migration is a well-established idea. The Grand-Tack Hypothesis says that Jupiter formed at 3.5 AU, migrated inward to 1.5 AU, and then back out again to 5.2 AU, where it resides today. Saturn was involved, too. Migration can also explain the Hot Jupiters we see orbiting extremely close to their stars in other solar systems. They couldn’t have formed there, so they must have migrated there. Even rocky planets can migrate early in a solar system’s history.

New research in the journal Science establishes dates for giant planet migration in our Solar System. Its title is “Dating the Solar System’s giant planet orbital instability using enstatite meteorites.” The lead author is Dr. Chrysa Avdellidou from the University of Leicester’s School of Physics and Astronomy.

“The question is, when did it happen?” Dr. Avdellidou asked. “The orbits of these planets destabilised due to some dynamical processes and then took their final positions that we see today. Each timing has a different implication, and it has been a great matter of debate in the community.”

“What we have tried to do with this work is to not only do a pure dynamical study, but combine different types of studies, linking observations, dynamical simulations, and studies of meteorites.”

The meteorites in this study are enstatites or E-type asteroids. E-type asteroids have enstatite (MgSiO3) achondrite surfaces. Achondrite means they lack chondrules, grains of rock that were once molten before being accreted to their parent body. Specifically, this group of meteorites are the low-iron chondrites called ELs.

When giant planets move, everything else responds. Tiny asteroids are insignificant compared to Jupiter’s mass. Scientists think E-type asteroids were dispersed during the gas giants’ outward migration. They may even have been the impactors in the hypothetical Late Heavy Bombardment.

Artist concept of Earth during the Late Heavy Bombardment period. Scientists have wondered if E-type asteroids disturbed during giant planet migration could’ve been responsible for the Bombardment, but the authors of this research don’t favour that explanation. Credit: NASA’s Goddard Space Flight Center Conceptual Image Lab.

Enstatite achondrites that have struck Earth have similar compositions and isotope ratios as Earth. This signals that they formed in the same part of the protoplanetary disk around the young Sun. Previous research by Dr. Avdellidou and others has linked the meteorites to a population of fragments in the asteroid belt named Athor.

This work hinges on linking meteorites to parent asteroids and measuring the isotopic ratios.

“If a meteorite type can be linked to a specific parent asteroid, it provides insight into the asteroid’s composition, time of formation, temperature evolution, and original size,” the authors explain. When it comes to composition, isotopic abundances are particularly important. Different isotopes decay at different rates, so analyzing their ratio tells researchers when each meteorite closed, meaning when it became cool enough that there was no more significant diffusion of isotopes. “Therefore, thermochronometers in meteorites can constrain the epoch at which major collisional events disturbed the cooling curves of the parent asteroid,” the authors explain.

The team’s research shows that Athor is a part of a once much larger parent body that formed closer to the Sun. It also suffered from a collision that reduced its size out of the asteroid belt.

Athor found its way back when the giant planets migrated. Athor was at the mercy of all that shifting mass and underwent its own migration back into the asteroid belt. Analysis of the meteorites showed that this couldn’t have happened earlier than 60 million years ago. Other research into asteroids in Jupiter’s orbit showed it couldn’t have happened later than 100 million years ago. Since the Solar System formed about 4.56 billion years ago, the giant planet migration happened between 4.5 and 4.46 billion years ago.

This schematic from the research shows what the researchers think happened. Red circles are planetesimals (and their fragments) from the terrestrial planet region. The black solid curves roughly denote the boundary of the current asteroid inner main belt. Eccentricity increases from bottom to top.

A shows the formation and cooling of the EL parent planetesimal in the terrestrial planet region before 60 Myr after Solar System formation. In this period, the terrestrial planets began scattering planetesimals to orbits with high eccentricity and semimajor axes corresponding to the asteroid main belt. B shows that between 60 and 100 Myr, the EL planetesimal was destroyed by an impact in the terrestrial planet region. At least one fragment (the Athor family progenitor) was scattered by the terrestrial planets into the scattered disk, as in (A). Then the giant planet instability implanted it into the inner main belt by decreasing its eccentricity. C shows that a few tens of millions of years after the giant planet instability occurred, a giant impact between the planetary embryo Theia and proto-Earth formed the Moon. D shows that the Athor family progenitor experienced another impact event that formed the Athor family at ~1500 Myr. Image Credit: Avdellidou et al. 2024.

Another important event happened right around the same time. About 4.5 billion years ago, a protoplanet named Theia smashed into Earth, creating the Moon. Could it all be related?

“The formation of the Moon also occurred within the range that we determined for the giant planet instability,” the authors write in their research. “This might be a coincidence, or there might be a causal relationship between the two events.”

“It’s like you have a puzzle, you understand that something should have happened, and you try to put events in the correct order to make the picture that you see today,” Dr. Avdellidou said. “The novelty with the study is that we are not only doing pure dynamical simulations, or only experiments, or only telescopic observations.”

“There were once five inner planets in our Solar System and not four, so that could have implications for other things, like how we form habitable planets. Questions like, when exactly objects came delivering volatile and organics to our planet to Earth and Mars?”

Artist’s impression of the impact that caused the formation of the Moon. Could giant planet migration have caused that impact? Credit: NASA/GSFC

The Solar System’s history is a convoluted, beautiful puzzle that somehow led to us. Everything had to work out for life to arise on Earth, sustain itself, and evolve for so long. The epic migration of the gas giants must have played a role, and this research brings its role into focus.

Never mind habitability, complex life, and civilization, the migration may have allowed Earth to form in the first place.

“The timing is very important because our Solar System at the beginning was populated by a lot of planetesimals,” said study co-author Marco Delbo, Director of Research at France’s Nice Observatory. “And the instability clears them, so if that happens 10 million years after the beginning of the Solar System, you clear the planetesimals immediately, whereas if you do it after 60 million years you have more time to bring materials to Earth and Mars.”

The post The Giant Planets Migrated Between 60-100 Million Years After the Solar System Formed appeared first on Universe Today.