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SpaceX launched 20 more of its Starlink broadband satellites, including 13 with direct-to-cell capability, from Florida tonight (Oct. 18).

For most of human history, the Sun appeared stable. It was a stoic stellar presence, going about its business fusing hydrogen into helium beyond our awareness and helping Earth remain habitable. But in our modern technological age, that facade fell away.

We now know that the Sun is governed by its powerful magnetic fields, and as these fields cycle through their changes, the Sun becomes more active. Right now, according to NASA, the Sun is at its solar maximum, a time of increased activity.

Solar Maximum means pretty much what it sounds like. In this phase of the cycle, our star is exhibiting maximum activity. The Sun’s intense magnetic fields produce more sunspots and solar flares than at any other time in its 11-year cycle.

The Solar Maximum is all based on the Sun’s magnetic fields. These fields are measured in Gauss units, which describe magnetic flux density. The Sun’s poles measure about 1 to 2 gauss, but sunspots are much higher at about 3,000 gauss. (Earth is only 0.25 to 0.65 gauss at its surface.) Since the magnetic field is so much stronger where sunspots appear, they inhibit convective heating from deeper inside the Sun. As a result, sunspots appear as dark patches.

Sunspots are visual indicators of the Sun’s 11-year cycle. The National Oceanic and Atmospheric Administration and an international group called the Solar Cycle Prediction Panel watch sunspots to understand where the Sun is at in its cycle.

“During solar maximum, the number of sunspots, and therefore, the amount of solar activity, increases,” said Jamie Favors, director of the Space Weather Program at NASA Headquarters in Washington. “This increase in activity provides an exciting opportunity to learn about our closest star — but also causes real effects at Earth and throughout our solar system.”

The effects came into focus for many of us recently. In May 2024, the Sun launched multiple CMEs. As the magnetic fields and charged particles reached Earth, they triggered the strongest geomagnetic storm in 200 decades. These created colourful aurorae that were visible much further from the poles than usual. NASA says that these aurorae were likely among the strongest displays in the last 500 years.

Scientists know the Sun is at its solar maximum. But it lasts for an entire year. They won’t know when its activity peaks until after they’ve watched it for months and its activity has declined.

“This announcement doesn’t mean that this is the peak of solar activity we’ll see this solar cycle,” said Elsayed Talaat, director of space weather operations at NOAA. “While the Sun has reached the solar maximum period, the month that solar activity peaks on the Sun will not be identified for months or years.”

Each cycle is different, making it difficult to label peak solar activity. Different peaks have different durations and have higher or lower peaks than others.

Understanding the Sun’s cycle is important because it creates space weather. During solar maximum, the increased sunspots and flares also mean more coronal mass ejections (CMEs.) CMEs can strike Earth, and when they do, they can trigger aurorae and cause geomagnetic storms. CMEs, which are blobs of hot plasma, can also affect satellites, communications, and even electrical grids.

NASA’s Solar Dynamics Observatory captured these images of solar flares below, as seen in the bright flashes in the left image (May 8, 2024 flare) and the right image (May 7, 2024 flare). The image shows 131 angstrom light, a subset of extreme ultraviolet light that highlights the extremely hot material in flares and which is colourized in orange.

via GIPHY

During the solar maximum, the Sun produces an average of three CMEs every day, while it drops to one CME every five days during the solar minimum. The CMEs’ effect on satellites causes the most concern. In 2003, satellites experienced 70 different types of failures. The failures ranged from erroneous signals in a satellite’s electronics to the destruction of electrical components. The solar storm that occurred in 2003 was deemed responsible for 46 of those 70 failures.

CMEs are also a hazard for astronauts orbiting Earth. The increased radiation poses a health risk, and during storms, astronauts seek safety in the most shielded part of the ISS, Russia’s Zvezda Service Module.

Galileo and other astronomers noticed sunspots hundreds of years ago but didn’t know exactly what they were. In a 1612 pamphlet titled “Letters on Sunspots,” Galileo wrote ‘The sun, turning on its axis, carries them around without necessarily showing us the same spots, or in the same order, or having the same shape.’ This contrasted with others’ views on the spots, some of which suggested they were natural satellites of the Sun.

We’ve known about the Sun’s magnetic fields for 200 hundred years, though at first, scientists didn’t know the magnetism was coming from the Sun. In 1724, an English geophysicist noticed that his compass was behaving strangely and was deflected from magnetic north throughout the day. In 1882, other scientists correlated these magnetic effects with increased sunspots.

In recent decades, we’ve learned much more about our stellar companion thanks to spacecraft dedicated to studying it. NASA and the ESA launched the Solar and Heliospheric Observatory (SOHO) in 1995, and NASA launched the Solar Dynamics Observatory (SDO) in 2010. In 2011, we got our first 360-degree view of the Sun thanks to NASA’s two Solar TErrestrial RElations Observatory (STEREO) spacecraft. In 2019, NASA launched the Parker Solar Probe, which also happens to be humanity’s fastest spacecraft.

Our understanding of the Sun and its cycles is far more complete now. The current cycle, Cycle 25, is the 25th one since 1755.

This figure shows the number of sunspots over the previous twenty-four solar cycles. Scientists use sunspots to track solar cycle progress; the dark spots are associated with solar activity, often as the origins for giant explosions—such as solar flares or coronal mass ejections—that can spew light, energy, and solar material out into space. Image Credit: NOAA’s Space Weather Prediction Center

“Solar Cycle 25 sunspot activity has slightly exceeded expectations,” said Lisa Upton, co-chair of the Solar Cycle Prediction Panel and lead scientist at Southwest Research Institute in San Antonio, Texas. “However, despite seeing a few large storms, they aren’t larger than what we might expect during the maximum phase of the cycle.”

The most powerful flare so far in Cycle 25 was on October 3rd, when the Sun emitted an X9 class flare. But scientists anticipate more flares and activity to come. There can be significantly powerful storms even in the cycle’s declining phase, though they’re not as common.

On October 3, 2024, the Sun emitted a strong solar flare. As of this date, this solar flare is the largest of Solar Cycle 25 and is classified as an X9.0 flare. X-class denotes the most intense flares, while the number provides more information about its strength. NASA’s Solar Dynamics Observatory captured imagery of this solar flare – as seen in the bright flash in the center – on October 3, 2024. The image shows a blend of 171 Angstrom and 131 Angstrom light, subsets of extreme ultraviolet light.
Image Credit: NASA/SDO

The Sun’s 11-year cycle is just one of its cycles, nested in larger cycles. The Gleissberg cycle lasts between 80 to 90 years and modulates the 11-year cycle. The de Vries cycle or Suess cycle lasts between 200 and 210 years, and the Hallstatt cycle lasts about 2,300 years. Both of these cycles contribute to long-term solar variation.

However, even with all we know about the Sun, there are big gaps in our knowledge. The Sun’s magnetic poles switch during the 11-year cycle, and scientists aren’t sure why.

There’s a lot more to learn about the Sun, but we won’t run out of time to study it any time soon. It’s in the middle of its 10-billion-year lifetime and will be a main-sequence star for another five billion years.

The post The Sun Has Reached Its Solar Maximum and it Could Last for One Year appeared first on Universe Today.

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Preparations for Next Moonwalk Simulations Underway (and Underwater) Jhony Zavaleta, ASIA-AQ Project Manager, welcomes DC-8 Navigator Walter Klein and the rest of the aircraft crew to U-Tapao, Thailand for its initial arrival to the country during the ASIA-AQ campaign. Erin Czech (back, blue shirt) and Jaden Ta (front, black pants) served as part of the Thailand ESPO site management team, while Zavaleta and Sam Kim (far right) worked as the ESPO advance team to prepare each new site for the mission’s arrival. NASA Ames/Rafael Luis Méndez Peña

ESPO solves problems before you know you have them. If you are missing a canister of liquid nitrogen, got locked out of your rental car, or need clearance for a South Korean military base, you want ESPO in your corner.

What is ESPO?

While the Earth Science Project Office (ESPO) does many things, one of the team’s primary responsibilities is providing project management for many of the largest and most complex airborne campaigns across NASA’s Earth Science Division.

Some of these missions are domestic, such as the Sub-Mesoscale Ocean Dynamics Experiment (S-MODE). S-MODE deployed three separate field campaigns from 2021-2023, using planes, drones, marine robotics, and research vessels to study ocean eddies and sub-surface dynamics. NASA Ames Research Center, located in Northern California, served as S-MODE’s control center and the base for two of the three deployed aircraft.

Erin Czech (far left) stands with Jacob Soboroff and the Today Show crew, members of the NASA Ames Public Affairs Office, researchers from the Jet Propulsion Laboratory (JPL), and the NASA Langley G-III air crew during S-MODE’s 2023 deployment. Courtesy of Jacob Soboroff

ESPO also provides project management for many international missions, such as the Airborne and Satellite Investigation of Asian Air Quality (ASIA-AQ), which deployed in January, 2024 out of South Korea, Thailand, and the Philippines. The campaign used satellites, aircraft, and ground-based sensors to study air quality across Asia, as part of a global effort to better understand the factors that contribute to air quality.

Despite the critical nature of ESPO’s work, they’ll be the first to tell you that their goal is to remain behind the scenes. “Our mission statement is essentially to let the scientists concentrate on science,” said Erin Czech, Assistant Branch Chief of ESPO. “Our team’s job is to stay in the background. We don’t really advertise all the things we do, the pieces we put together, the crises we solve, because we don’t want folks to have to be in the weeds with us. We’ll take care of it.”

Making the invisible, visible: What does this look like in practice?

Before a deployment:

Project management for major airborne campaigns begins long before a deployment. The team begins by helping establish a mission framework, such as getting a budget in place, settling grants and funding with partner universities and agencies, and performing site visits.

“We are not scientists,” Czech said, “it’s the job of the Principal Investigator to mission plan. Our job is to evaluate risk, set up contingency plans, and help make sure all the different groups are talking to each other. We work with world-class scientists, who are going to come up with an awesome plan; we just want to do whatever we need to in order to support them.”

We work with world-class scientists, who are going to come up with an awesome plan; we just want to do whatever we need to in order to support them.

Erin Czech

ESPO Assistant Branch Chief

As the deployment date draws closer, the team nails down logistics: deciding how and where to ship equipment, reserving hotel blocks for researchers, acquiring diplomatic clearances, running planning meetings between agencies, and so much more.

This process is particularly complicated for multi-site, international missions like ASIA-AQ, which required multiple visits to each country before the actual deployment. “We looked at many locations in each country on the first scouting trip, to help figure out deployment sites,” said Jhony Zavaleta, Deputy Director for ESPO and Project Manager for ASIA-AQ. “The second scouting trip was to evaluate modifications promised during the first trip, such as upgrades to infrastructure, and to figure out hotels, transit options, specific facilities for mission operations, that sort of thing.”

According to Zavaleta, another purpose of these advance trips was to put pieces in place with partner organizations  – such as civilian aviation authorities, foreign science ministries, or military operations – so that when NASA officially requested diplomatic clearance to run the airborne campaigns, the groundwork had already been laid.

Then it’s go time. 

During the deployment:

As the deployment gets underway, ESPO keeps the flurry of activity running as smoothly as possible.

“During a deployment, you’re working all day every day,” said Czech, who is also the Project Manager for S-MODE. “But really that’s the whole mission team. When you’re on a NASA project, the whole team is incredibly dedicated and working like crazy, because everybody’s on the same page to make the most out of this investment, and take advantage of any kind of science opportunity that presents itself day to day.”

For Zavaleta, day-to-day operations meant escorting personnel onto military bases, tracking down liquid nitrogen, coordinating media days with local news outlets, setting up satellite communications, arranging transportation between sites, and preparing the next location. “I was on the ESPO advance team, which would set up one location, overlap with the ESPO site management team for about a week, then head to the next,” Zavaleta recalled. “Our teams would leapfrog; we were always managing site logistics, but also always preparing and setting up for the next spot.”

(From left) Stevie Phothisane, Vidal Salazar, and Daisy Gonzalez, the ESPO site management team for the Philippines during ASIA-AQ, sit at Clark International Airport coordinating daily operations support while the aircraft was in flight.NASA Ames/Rafael Luis Méndez Peña

Beyond the day-to-day operations, ESPO also steps in when major issues arise. According to Czech, they can usually expect one or two big wrenches to come up for any major mission.

For S-MODE, the first wrench came in the form of a global pandemic. “The original deployment was set for April, 2020,” Czech said. “Everything was shutting down, and we had just set everything up: ship, aircraft, everything. In fact, we set everything up two more times before we ultimately got to do our first deployment, in October of 2021.”

The second major wrench happened when four months before the actual launch, the research vessel the mission was planned around backed out. From there, Czech said it was a mad scramble to find a suitable replacement vessel that was already on the West Coast, and to build out the on-board infrastructure to meet the mission requirements.

The R/V (Research Vessel) Oceanus sits docked in Newport, Oregon during S-MODE ship mobilization. The Oceanus was one of three research vessels that deployed throughout the mission. NASA Ames/Sommer Nicholas

“The key is just to always be on the lookout for issues, keep agile, and don’t get too frustrated if things don’t go your way,” Czech said. “It is what it is. Some major issue comes up on every big mission: you’ve just got to figure out how to deal with it, then move on.”

After the deployment:

After a field deployment is finished, there are still years of work to do – for the scientists and for ESPO.

The final S-MODE field deployment concluded in Spring of 2023. While the science team has been processing data and analyzing results, ESPO’s role has been to organize annual science team meetings, track publications tied to the mission, and help compile a final report to be presented in Washington DC when the mission officially wraps in May of 2025.

Researchers Kayli Matsuyoshi, Luke Colosi and Luc Lenain in the Air-Sea Interaction Laboratory at SIO discussing the latest S-MODE findings. Courtesy of Nick Pizzo

For ASIA-AQ, whose deployment wrapped up in March of 2024, ESPO’s first task was getting all equipment and personnel back to their respective home bases. Next up, Zavaleta and his team are coordinating a science team meeting in Malaysia in January of 2025, and supporting the scientists as they put together a preliminary research report for later that spring.

Knowledge and Expertise

While logistical skills and communication brokering are important pieces of ESPO’s role, knowledge may be the group’s most important asset. “In many ways, our value to NASA lies in the fact that we’ve been doing this a long time,” Czech said. “Our first mission was in 1987, and we’ve run over 60 campaigns since then; we have a lot of institutional knowledge that gets passed down, and a lot of experience between our team members. That expertise is a large part of our value to the agency.”

To access the data from S-MODE, visit the Physical Oceanography Distributed Active Archive Center (PO.DAAC)

About the AuthorMilan LoiaconoScience Communication Specialist

Milan Loiacono is a science communication specialist for the Earth Science Division at NASA Ames Research Center.

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• Earth Science
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The Oort Cloud comet, called C/2023 A3 Tsuchinshan-ATLAS, passes over Southeast Louisiana near New Orleans, home of NASA’s Michoud Assembly Facility, Sunday, Oct. 13, 2024. The comet is making its first appearance in documented human history; it was last seen in the night sky 80,000 years ago. The Tsuchinshan-ATLAS comet made its first close pass by Earth in mid-October and will remain visible to viewers in the Northern Hemisphere just between the star Arcturus and planet Venus through early November.

NASA/Eric Bordelon

Comet C/2023 A3 (Tsuchinshan-ATLAS) passes over NASA’s Michoud Assembly Facility in New Orleans in this Oct. 13, 2024, image. This comet comes from the Oort Cloud, far beyond Pluto and the most distant edges of the Kuiper Belt. Though Comet C/2023 A3 will be visible through early November, the best time to observe is between now and Oct. 24.

Image credit: NASA/Eric Bordelon

On July 1st, 2023 (Canada Day!), the ESA’s Euclid mission lifted off from Cape Canaveral, Florida, atop a SpaceX Falcon 9 rocket. As part of the ESA’s Cosmic Vision Programme, the purpose of this medium-class mission was to observe the “Dark Universe.” This will consist of observing billions of galaxies up to 10 billion light-years away to create the most extensive 3D map of the Universe ever created. This map will allow astronomers and cosmologists to trace the evolution of the cosmos, helping to resolve the mysteries of Dark Matter and Dark Energy.

The first images captured by Euclid were released by the ESA in November 2023 and May 2024, which provided a glimpse at their quality. On October 15th, 2024, the first piece of Euclid‘s great map of the Universe was revealed at the International Astronautical Congress (IAC) in Milan. This 208-gigapixel mosaic contains 260 observations made between March 25th and April 8th, 2024, and provides detailed imagery of millions of stars and galaxies. This mosaic accounts for just 1% of the wide survey that Euclid will cover over its six-year mission and provides a sneak peek at what the final map will look like.

The IAC 2024 session, which took place from October 14th – 18th in Milan, was the 75th annual meeting of the Congress. The session welcomed over 8,000 experts from space agencies, the research sector, and the space industry to come together and discuss the use of space to support sustainability. The mosaic, presented by ESA Director General Josef Aschbacher and Director of Science Carole Mundell during the event, contains about 100 million sources, including stars in our Milky Way and galaxies beyond.

The main objective of the Euclid mission is to measure the hidden influence of Dark Matter and Dark Energy on the Universe. These will hopefully resolve questions that astronomers have been dealing with for decades. It all began in the 1960s when astronomers noted that the rotational curves of galaxies did not agree with the observed amounts of matter they contained. This led to speculation that there must be a mysterious, invisible mass that optical telescopes could not account for (aka. Dark Matter).

By the 1990s, thanks to observations made by the venerable Hubble Space Telescope, astronomers also noticed that the rate at which the Universe has been expanding (the Hubble-Lemaitre Constant) was accelerating with time. By observing the shapes, distances, and motions of billions of galaxies, Euclid‘s 3D map will provide the most accurate estimates of galactic masses and cosmic expansion over the past 10 billion years. Zooming very deep into the mosaic (see image below), the intricate structure of the Milky Way can be seen, as well as many galaxies beyond.

Another interesting feature is what looks like clouds between the stars in our galaxy, which appear light blue against the background of space. This is the gas and dust of the interstellar medium (ISM), which is known on a galactic scale as the “galactic cirrus” (because of its resemblance to clouds). Euclid‘s super-sensitive optical camera—the VISible instrument (VIS), composed of 36 charged-coupled devices (CCDs) with 4000 x 4000 pixels each—can see these clouds as they reflect optical light from the Milky Way. Said Euclid Project Scientist Valeria Pettorino in an ESA press release.

“This stunning image is the first piece of a map that, in six years, will reveal more than one-third of the sky. This is just 1% of the map, and yet it is full of a variety of sources that will help scientists discover new ways to describe the Universe.”

This graphic provides an overview of the mosaic and zoomed-in images released by ESA’s Euclid mission on October 15th, 2024. Credit: ESA/Euclid/Euclid Consortium/NASA/CEA Paris-Saclay/J.-C. Cuillandre, E. Bertin, G. Anselmi

As noted, the mosaic shows only 1% of what Euclid will observe during the course of its six-year mission. In just two weeks, the observatory covered 132 square degrees of the Southern Sky in pristine detail (more than 500 times the area of the full Moon). Since the mission began routine science observations in February, 12% of the survey has been completed. By March 2025, the ESA will release 53 square degrees of the survey, including a preview of the Euclid Deep Field areas. This will be followed by the release of the first year of cosmology data sometime in 2026.

The Euclid Consortium (EC) consists of more than 2000 scientists from 300 institutes in Europe, the USA, Canada, and Japan and is responsible for providing the mission’s instruments and data analysis.

Further Reading: ESA

The post Check Out This Sneak Peek of the Euclid mission’s Cosmic Atlas appeared first on Universe Today.

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Preparations for Next Moonwalk Simulations Underway (and Underwater) NASA and partners from Aerostar and AeroVironment discuss a simulation of a high-altitude air traffic management system for vehicles flying 60,000 feet and above in the Airspace Operations Lab (AOL) at NASA’s Ames Research Center in California’s Silicon Valley.NASA/Don Richey

NASA, in partnership with AeroVironment and Aerostar, recently demonstrated a first-of-its-kind air traffic management concept that could pave the way for aircraft to safely operate at higher altitudes. This work seeks to open the door for increased internet coverage, improved disaster response, expanded scientific missions, and even supersonic flight. The concept is referred to as an Upper-Class E traffic management, or ETM. 

There is currently no traffic management system or set of regulations in place for aircraft operating 60,000 feet and above. There hasn’t been a need for a robust traffic management system in this airspace until recently. That’s because commercial aircraft couldn’t function at such high altitudes due to engine constraints.  

However, recent advancements in aircraft design, power, and propulsion systems are making it possible for high altitude long endurance vehicles — such as balloons, airships, and solar aircraft — to coast miles above our heads, providing radio relay for disaster response, collecting atmospheric data, and more.  

But before these aircraft can regularly take to the skies, operators must find a way to manage their operations without overburdening air traffic infrastructure and personnel.  

NASA partners from Aerostar and AeroVironment discuss a simulation of the ATM-X E Traffic Management (ETM) system for vehicles flying 60,000 feet and above in the Airspace Operations Lab (AOL) at NASA’s Ames Research Center in California’s Silicon Valley.

“We are working to safely expand high-altitude missions far beyond what is currently possible,” said Kenneth Freeman, a subproject manager for this effort at NASA’s Ames Research Center in California’s Silicon Valley. “With routine, remotely piloted high-altitude operations, we have the opportunity to improve our understanding of the planet through more detailed tracking of climate change, provide internet coverage in underserved areas, advance supersonic flight research, and more.” 

Current high-altitude traffic management is processed manually and on a case-by-case basis. Operators must contact air traffic control to gain access to a portion of the Class E airspace. During these operations, no other aircraft can enter this high-altitude airspace. This method will not accommodate the growing demand for high-altitude missions, according to NASA researchers.  

To address this challenge, NASA and its partners have developed an ETM traffic management system that allows aircraft to autonomously share location and flight plans, enabling aircraft to stay safely separated. 

During the recent traffic management simulation in the Airspace Operations Laboratory at Ames, data from multiple air vehicles was displayed across dozens of traffic control monitors and shared with partner computers off site. This included aircraft location, health, flight plans and more. Researchers studied interactions between a slow fixed-wing vehicle from AeroVironment and a high-altitude balloon from Aerostar operating at stratospheric heights. Each aircraft, connected to the ETM traffic management system for high altitude, shared location and flight plans with surrounding aircraft.  

This digital information sharing allowed Aerostar and AeroVironment high-altitude vehicle operators to coordinate and deconflict with each other in the same simulated airspace, without having to gain approval from air traffic control. Because of this, aircraft operators were able to achieve their objectives, including wireless communication relay. 

This simulation represents the first time a traffic management system was able to safely manage a diverse set of high-altitude aircraft operations in the same simulated airspace. Next, NASA researchers will work with partners to further validate this system through a variety of real flight tests with high-altitude aircraft in a shared airspace.   

The Upper-Class E traffic management concept was developed in coordination with the Federal Aviation Administration and high-altitude platform industry partners, under NASA’s National Airspace System Exploratory Concepts and Technologies subproject led out of Ames.  

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