Space Weather #space-weather · USA/NASA February 28, 2026

Sun Goes Spotless for First Time in Three Years

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NASA Administrator at Stennis Space Center
NASA / NASA/Joel Kowsky

Sun Goes Spotless for First Time in Three Years

The Sun Just Hit Pause

For the first time since June 2022, the sun's surface went completely blank on February 22, 2026. No sunspots. No magnetic turbulence. No dark, cooler patches that typically herald incoming solar storms. The observation marks a rare moment of calm on our star's perpetually restless surface—but it lasted only days before new activity resumed.

The spotless day, recorded by NASA's Solar Dynamics Observatory, arrived as the sun enters what scientists call the declining phase of its 25th solar cycle. While brief, this moment offers a window into the machinery of solar weather and what Earth can expect in the coming years.

Why Sunspots Matter

Sunspots aren't cosmetic features. They're windows into the sun's magnetic violence. These cooler, darker patches form where extraordinarily strong magnetic fields—tens of thousands of times stronger than Earth's—prevent heat from rising to the surface. More importantly, they signal danger.

Where there are sunspots, solar flares and coronal mass ejections (CMEs) tend to follow. These eruptions hurl billions of tons of plasma into space. When that plasma reaches Earth, it buffets our magnetosphere, triggering geomagnetic storms that disrupt satellite communications, GPS navigation, and electrical grids. During the current cycle's peak in 2024, such events became frequent enough to make headlines and trigger emergency protocols in critical infrastructure sectors.

Conversely, when sunspots vanish, solar violence typically subsides. February's spotless observation suggests the sun is winding down from its peak, a cyclical process as reliable as seasons on Earth.

The 11-Year Rhythm

The sun operates on an 11-year heartbeat. Activity rises and falls in a predictable oscillation, with sunspot density peaking around the middle of each cycle and bottoming out during the solar minimum. The current cycle peaked in 2024, meaning we're now in the declining phase—but scientists caution we're not there yet.

Historically, solar minimums are profound. Between 2018 and 2020, during the last minimum, the sun went spotless for over 700 days total—entire weeks without visible magnetic activity. The next solar minimum is expected around 2030, still four years away. That means the sun likely has more volatility ahead before settling into its quiet years.

But here's the nuance: even during minimums, sporadic sunspots and flares can erupt. Quieter doesn't mean silent. It means fewer disruptions, on average, and more predictable space weather patterns.

What February's Lull Reveals

The fact that sunspots reappeared by February 24 demonstrates the sun isn't fully committed to shutdown yet. This brief spotlight-free window was more symbolism than substance—a data point in the larger narrative rather than a turning point.

For space operators, satellite engineers, and power grid managers, February's observation serves as a reminder: we're transitioning from a period of elevated risk toward calmer conditions. Solar activity forecasts for the next four years will trend downward. That's good news for infrastructure stability and bad news for aurora photographers hoping for more show-stopping northern lights displays.

Scientists continue monitoring the sun's surface daily, tracking sunspot emergence and solar flare activity. These observations feed into models that help industry prepare for space weather events and, conversely, anticipate periods when our orbit becomes safer.

What's Next

Watch for the frequency of spotless days to increase over the coming months and years as solar minimum approaches. By 2028–2030, extended weeks without visible sunspots should become the norm. Meanwhile, any major solar events between now and then will likely be isolated outbursts rather than sustained activity—the sun's final gasps before settling in for a quieter era.

💡
Think of it like...

1,350 days without sunspots is equivalent to roughly 3.7 years of continuous solar monitoring—imagine checking your email every single day for nearly four years and finding nothing.

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Solar Dynamics Observatory·satellite
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Discovery1 day ago

NASA Just Made Moonlight into Breathable Air

The News NASA's Carbothermal Reduction Demonstration (CaRD) project has cleared a critical hurdle: successfully extracting oxygen from simulated lunar regolith using nothing but concentrated sunlight. The integrated prototype test, conducted aboard the International Space Station, confirmed that solar-driven chemistry can produce carbon monoxide from lunar soil—the essential first step toward generating breathable air for astronauts living on the Moon. This isn't theoretical anymore. It's hardware that works. Why This Matters Right Now The challenge facing long-duration lunar missions is brutally simple: you can't ship enough oxygen from Earth. Resupply missions are expensive, infrequent, and add massive weight to launch vehicles. For NASA's Artemis program to establish a sustainable lunar base—a cornerstone of the Moon-to-Mars architecture—the agency needs to generate life support resources on-site rather than hauling them across 240,000 miles of vacuum. CaRD solves this by turning lunar geology into life support. The Moon's regolith, the pulverized rock covering its surface, is approximately 45% oxygen by mass, locked inside silicate minerals. The catch: extracting it requires intense heat. CaRD uses a solar concentrator—essentially a sophisticated mirror array—to focus sunlight into a reactor hot enough to drive carbothermal reduction, the same chemistry used on Earth to refine metals from ore. The Technical Achievement The CaRD prototype integrates four major components: a carbothermal oxygen production reactor built by Sierra Space, a solar concentrator designed by NASA Glenn Research Center, precision mirrors from Composite Mirror Applications, and avionics and gas analysis systems from Kennedy Space Center. Johnson Space Center pulled the systems engineering together. During testing, they confirmed production of carbon monoxide (CO) from the regolith simulant—proof that the concept works in controlled conditions. The real power lies downstream: when CO is converted into O₂ using additional chemical processes already in development, the system could produce a steady oxygen supply for habitat life support, fuel cell operations, or even metallurgical processes. Why carbothermal reduction specifically? It's proven industrial chemistry, scalable, and—critically—it requires no chemical inputs that aren't already abundant on the Moon. Sunlight is the only external resource needed. What Comes Next The immediate path forward involves coupling this oxygen extraction with conversion technology to turn CO into usable O₂. Beyond the lunar south pole, NASA is already eyeing how to adapt CaRD for Mars, where the technology could extract oxygen from Martian regolith or even convert atmospheric CO₂ into propellant. The cost and logistics savings are staggering: reducing payload mass for human missions, decreasing launch frequency, and enabling crews to live off the land rather than Earth's supply chain. CaRD was funded by NASA's Game Changing Development program under the Space Technology Mission Directorate—signaling this is no longer moonshot research, but mainstream development. As Artemis missions ramp up in the coming years, technologies like this transition from "demonstration" to "flight hardware." The Moon just became a lot more hospitable.

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