A total solar eclipse is seen from San Millán de los Caballeros, Spain, Wednesday, Aug. 12, 2026. A total solar eclipse – the Moon passing between the Sun and Earth, completely blocking the face of the Sun – swept across parts of Greenland, Iceland, northern Russia, the Atlantic Ocean, Spain, and a small corner of Portugal. A partial eclipse was visible in parts of the U.S., most of Canada, much of Europe, and northwest Africa.
NASA’s COFFIES Uses AI to Predict Storm-Causing Active Regions on Sun
EDITOR’S NOTE: This storywas revised Aug. 27, 2026, to clarify the interrelationship between the COFFIES DRIVE Science Center and SWAO.
As humanity looks to the Moon and stars for future exploration, predicting space weather — conditions in space primarily driven by the Sun — is more important than ever.
Now, a team of astrophysicists and data scientists with NASA’s COFFIES (Consequence Of Fields and Flows in the Interior and Exterior of the Sun) has developed a novel machine-learning model capable of predicting the emergence of active regions on the Sun up to 12 hours before they appear.
The Sun is constantly churning. Intense concentrations of localized magnetic fields can suddenly break through the solar surface, forming sunspots. Space weather forecasters then collectively number and track sunspots since they are visible manifestations of active regions, which serve as the main engines behind severe space weather events such as solar flares and coronal mass ejections. These eruptions send waves of high-energy radiation and charged particles across space, creating storms that can threaten astronauts, disable satellites, and disrupt radio communications on Earth.
NASA’s Solar Dynamics Observatory captured this image of a solar flare — seen as the bright flash in the upper right — on June 30, 2026. The image shows a subset of extreme ultraviolet light that highlights the extremely hot material in flares and which is colorized in teal.
NASA’s Goddard Space Flight Center/SDO
By bridging expertise across different scientific institutions, COFFIES, a NASA DRIVE (Diversify, Realize, Integrate, Venture, Educate) Science Center, brought together a team of researchers from New Jersey Institute of Technology (NJIT), Princeton University, and NASA’s Ames Research Center in California’s Silicon Valley. The team turned to advanced artificial intelligence architectures — which dictate how data is processed and used to produce reliable predictions or actions — to capture subtle, time-based pattern changes on the solar surface before an active region took shape. By analyzing data captured by the agency’s Solar Dynamics Observatory and using NASA Ames’ supercomputing resources, this new approach, published in the Journal of Geophysical Research: Machine Learning and Computation, looks at fluctuations in acoustic waves caused by sunspot regions when the regions form beneath the solar surface and begin the journey upward to emerge on the surface.
“We cannot directly see the magnetic structure while it is still rising through the solar interior. Instead, we must look for indirect effects — very small changes in the magnetic field and in the pattern of acoustic waves continually traveling through the Sun,” said Alexander Kosovichev, a COFFIES co-investigator at NJIT. “The developed technique identifies precursors associated with an emerging active region in slight changes of the Sun’s acoustic power — more like a slight change in rhythm within a very noisy orchestra.”
This video is an example of what scientists use when analyzing the solar surface. This particular time frame tracks the magnetic field on the Sun’s surface during the emergence of active region AR11158 in February 2011. The blue square grid highlights a target area on the Sun. The squares on the right side translates the data from the target grid area to show opposing magnetic polarities, indicated by the warm and cool-colored tones. The first column of blocks shows targeted areas at original resolution, the middle column displays data as 2D maps, and the right column plots changes in magnetic polarity over time as 1D curves. By watching these blocks, scientists can see signs of active region emergence, such as drops in acoustic waves and rises in magnetic fields.
NASA’s COFFIES DRIVE Science Center/Irina Kitiashvili and Spiridon Kasapis
To develop current operational forecasts, the National Oceanic and Atmospheric Administration’s Space Weather Prediction Center and the United States Air Force monitor active regions that are already visible on the Sun to analyze the regions’ characteristics and estimate the probability of solar flares.
The COFFIES team aims to revolutionize this process. The AI model the team developed uses a specialized early detection system to handle very long sequences of data — called sliding-window transformer architecture — to use observations to find tiny reductions in the Sun’s acoustic activity and magnetic field, signals that scientists struggled to capture until now. These reductions form patterns that the AI model uses to predict active regions several hours before they become visible on the solar surface. Instead of looking at all activity on the solar surface at once, like earlier deep learning approaches have done, this new model moves a fixed-size “viewing window” across a long timeline of the Sun’s activity to focus on recent data while remembering overall patterns. This method allows forecasters the ability to predict approximate locations of emerging sunspots, rather than relying on counting already visible sunspots.
This promising AI architecture shows how deep machine learning can contribute to heliophysics — the field studying the nature of the Sun and how it influences the very nature of space and the planets that exist there. While the model is not ready for operational real-time forecasting, the team plans to validate the approach across many more known solar events to fine-tune the model.
NASA’s real-time space weather monitoring
As NASA focuses on sending humans to explore the Moon with the Artemis missions and sending the first crewed missions to Mars, monitoring and forecasting space weather is important for ensuring the safety of our astronauts and the equipment they rely on. This predictive leap from the COFFIES team could prove vital for safeguarding technology and deep-space explorers from the volatile environment of our solar system.
NASA’s Moon to Mars Space Weather Analysis Office monitors space weather 7 days a week. This important work helps decision makers not only protect people and equipment but maintain the services our modern society relies on every day. NASA’s space weather monitoring is also critical for safeguarding astronauts as they journey to the Moon and onward to Mars.
NASA/Lacey Young
Teams across NASA and NOAA collaborate to transition research capabilities into actual 360-degree space weather monitoring operational tools — including NASA’s Space Radiation Analysis Group, Moon to Mars Space Weather Analysis Office (M2M SWAO), and Community Coordinated Modeling Center as well as NOAA’s Space Weather Prediction Center. Sunspot region emergence prediction capabilities, especially of the Sun’s far side, could provide new information that supplements current models used by these teams.
“The COFFIES AI model has the potential to help predict the occurrence of complex active regions often associated with hazardous solar flares and coronal mass ejections,” said Michelangelo Romano, M2M SWAO deputy director. “This exciting capability would enable our office to provide advanced warning about increased space weather activity to the Space Radiation Analysis Group at NASA’s Johnson Space Center to help protect astronauts involved in the International Space Station, Artemis, and upcoming Moon Base missions.”
NASA’s COFFIES is one of three DRIVE Science Centers created to encourage collaborative science by establishing centers that are made of multidisciplinary teams from several institutions across the U.S. These pioneering facilities employ modelers, theoreticians, computer scientists, and observers to study important mysteries of our star and its influence, a branch of science known as heliophysics.
The COFFIES team focuses on the interconnected processes behind the Sun’s activity. Understanding the Sun’s interior and magnetic variability is key to advancing our understanding of the Sun’s 11-year activity cycle and fine-tuning space weather forecasting tools.
This image shows an illustration of the constellation Cygnus, Latin for “swan,” in the night sky. The Cygnus Loop supernova remnant, also known as the Veil Nebula, is located near one of the swan’s wings, outlined here in a rectangular box.
NASA
Bird constellations abound in the night sky, including Cygnus, the majestic swan. Easy to find with its dazzling stars, it is one of the few constellations that look like its namesake, and it is full of treasures. Visible in the Northern Hemisphere all summer long, there’s so much to see and even some things that can’t be seen. To locate Cygnus, start with the brightest star, Deneb, also the northeasternmost and dimmest star of the Summer Triangle. The Summer Triangle is made up of three bright stars from three different constellations – read more about it in the September 2022 issue of Night Sky Notes. “Deneb” is an Arabic word meaning the tail. Then travel into the triangle until you see the star Albireo, sometimes called the “beak star” in the center of the summer triangle. Stretching out perpendicular from this line are two stars that mark the crossbar, or the wings, and there are also faint stars that extend the swan’s wings.
From light-polluted skies, you may only see the brightest stars, sometimes called the Northern Cross. In a darker sky, the line of stars marking the neck of the swan travels along the band of the Milky Way. A pair of binoculars will resolve many stars along that path, including a sparkling open cluster of stars designated Messier 29, found just south of the swan’s torso star. This grouping of young stars may appear reddish due to nearby excited gas.
Let’s go deeper. While the bright beak star Albireo is easy to pick out, a telescope will let its true beauty shine! Like a jewel box in the sky, magnification shows a beautiful visual double star, with a vivid gold star and a brilliant blue star in the same field of view. There’s another marvel to be seen with a telescope or strong binoculars – the Cygnus Loop. Sometimes known as the Veil Nebula, you can find this supernova remnant (the gassy leftovers blown off of a large dying star) directly above the final two stars of the swan’s eastern wing. It will look like a faint ring of illuminated gas about three degrees across (six times the diameter of the Moon).
The black hole named Cygnus X-1 formed when a large star caved in. This black hole pulls matter from the blue star beside it.
Image: NASA, CXC, Melissa Weiss (CXC)
Speaking of long-dead stars, astronomers have detected a high-energy X-ray source in Cygnus that we can’t see with our eyes or backyard telescopes, but that is detectable by NASA’s Chandra X-ray Observatory. Discovered in 1971 during a rocket flight, Cygnus X-1 is the first X-ray source to be widely accepted as a black hole. This black hole is the final stage of a giant star’s life, with a mass of about 20 Suns. Cygnus X-1 is spinning at a phenomenal rate – more than 800 times a second – while devouring a nearby star. Astronomically speaking, this black hole is in our neighborhood, 6,070 light years away. But it poses no threat to us, just offers a new way to study the universe.
Check out the beautiful bird in your sky this evening, and you will be delighted to add Cygnus to your go-to summer viewing list and visit NASA’s Black Hole Basics page to learn more!
Originally posted by Dave Prosper: May 2023 Last Updated by Kat Troche: July 2026
NASA Shares Views of August Solar Eclipse from Ground, Air, Space
This composite image shows the progression of a total solar eclipse as the Sun sets over San Millán de los Caballeros, Spain, on Wednesday, Aug. 12, 2026.
Credits: NASA/Bill Ingalls
On Aug. 12, a total solar eclipse darkened skies over Greenland, Iceland, and Spain. As the Moon covered the Sun, it briefly revealed the Sun’s wispy outer atmosphere — the corona — to those in the path of totality who were lucky enough to have clear skies. NASA researchers and photographers were along the eclipse path to study the corona, capture the phenomenon, and observe how the eclipse affected our planet.
One NASA photographer in Spain captured the total solar eclipse as well as the partial phases before and after, until the Sun set below the horizon.
This composite image shows the progression of a total solar eclipse over a field of sunflowers in San Millán de los Caballeros, Spain, on Aug. 12, 2026. Credit: NASA/Bill Ingalls
The solar corona appears in this photograph of a total solar eclipse captured from San Millán de los Caballeros, Spain, on Aug. 12, 2026. Credit: NASA/Bill Ingalls
A solar prominence, a plume of electrically charged gas suspended above the Sun by strong magnetic forces, appears as a pink feature along the left edge of the eclipsed Sun in this photograph taken from San Millán de los Caballeros, Spain, on Aug. 12, 2026. Credit: NASA/Bill Ingalls
This composite image shows the progression of a total solar eclipse as the Sun sets in San Millán de los Caballeros, Spain, on Aug. 12, 2026. Credit: NASA/Bill Ingalls
In northern Maine, where only a partial eclipse was visible, another NASA photographer captured the International Space Station, with its crew of seven aboard, speeding past the partially eclipsed Sun.
In this image of a partial solar eclipse, which is veiled by clouds, the International Space Station, with a crew of seven aboard, appears in silhouette as it transits at roughly five miles per second on Aug. 12, 2026, as seen near Hodgdon, Maine. Aboard the station as part of Expedition 75 are NASA astronauts Jessica Meir, Anil Menon, and Jack Hathaway; ESA (European Space Agency) astronaut Sophie Adenot; and Roscosmos cosmonauts Pyotr Dubrov, Andrey Fedyaev, and Anna Kikina. Credit: NASA/Joel Kowsky
Twelve frames assembled in sequence show the International Space Station, with a crew of seven aboard, in silhouette as it transits the Sun at roughly five miles per second during a partial solar eclipse on Aug. 12, 2026, as seen near Hodgdon, Maine. Clouds partially obscure the view of the Sun. Aboard the station as part of Expedition 75 are NASA astronauts Jessica Meir, Anil Menon, and Jack Hathaway; ESA (European Space Agency) astronaut Sophie Adenot; and Roscosmos cosmonauts Pyotr Dubrov, Andrey Fedyaev, and Anna Kikina. Credit: NASA/Joel Kowsky
Meanwhile, from about 250 miles above the ground, a NASA astronaut aboard the International Space Station snapped a few photos of the partial eclipse from their perspective as well.
NASA astronaut Jessica Meir captured this photo of the partial solar eclipse from the International Space Station on Aug. 12, 2026, as the orbital outpost soared 262 miles above southern Quebec, Canada. From the station, the Moon covered about 18% of the Sun at the peak of the eclipse. Credit: NASA/Jessica Meir
Between the ground and the space station, NASA pilots flew NASA’s WB-57F research jet at an altitude of 50,000 feet, passing through the eclipse’s shadow to lengthen their time in the eclipse. The jet carried a suite of cameras that captured high-resolution images of the corona and prominences, plumes of electrically charged gas rising off the Sun, in several different wavelengths of light.
The total solar eclipse on Aug. 12, 2026, was captured by a camera mounted inside the cockpit window of NASA’s WB-57F aircraft as it flew around 50,000 feet altitude off the coast of Iceland.
NASA
A suite of cameras installed on NASA’s WB-57F aircraft captured images of the solar corona and prominences in different wavelengths of visible and infrared light during the total solar eclipse on Aug. 12, 2026. A science team led by the Southwest Research Institute in Boulder, Colorado, will analyze the images to learn more about complex and dynamic features in the Sun’s outer atmosphere. Credit: NASA/SwRI/Will Ashfield
In both Iceland and Spain, teams of students participating in the NASA-funded Nationwide Eclipse Ballooning Project launched scientific balloons that carried instruments to capture images of the eclipse’s shadow and study the eclipse’s effects on our atmosphere. Even though clouds obscured the view of the eclipse from the ground in Iceland, the weather did not interfere with the balloon-borne instruments’ ability to gather information about how the brief loss of light and heat affected the lower atmosphere.
Students participating in the NASA-funded Nationwide Eclipse Ballooning Project prepare to launch a scientific balloon in Mosfellsbær, Iceland, during the total solar eclipse on Aug. 12, 2026. Credit: NASA/Abbey Interrante
The Moon’s shadow passes over the atmosphere during the total solar eclipse on Aug. 12, 2026. The video was taken by a camera carried by a scientific balloon launched from Spain by a student team from Montana State University participating in the NASA-funded Nationwide Eclipse Ballooning Project. The video captures about six minutes of time but is sped up to play at four times real speed. Passing through the foreground are some other science instruments carried by the same balloon.
Nationwide Eclipse Ballooning Project/Montana State University
Before the eclipse, scientists at Predictive Science Inc., with support from NASA grants and supercomputers, used observations of the Sun from NASA spacecraft and ground-based telescopes to predict what the corona would look like during the eclipse. Below, their corona prediction is compared to a composite image of the corona, which combines multiple images captured by the NASA-supported DEB Initiative project during the total eclipse near León, Spain.
prediction
image
This image shows a prediction from the morning of Aug. 12, 2026, of what the solar corona would look like to the human eye during the total solar eclipse that day.
Predictive Science Inc.
This processed, composite image of the corona combines multiple images captured near León, Spain, during the total solar eclipse on Aug. 12, 2026.
DEB Initiative Team/Zack Stockbridge
This image shows a prediction from the morning of Aug. 12, 2026, of what the solar corona would look like to the human eye during the total solar eclipse that day.
Predictive Science Inc.
This processed, composite image of the corona combines multiple images captured near León, Spain, during the total solar eclipse on Aug. 12, 2026.
DEB Initiative Team/Zack Stockbridge
prediction
image
The left image shows a prediction from the morning of Aug. 12, 2026, of what the solar corona would look like to the human eye during the total solar eclipse that day. The right image is processed, composite image of the corona that combines multiple images captured near León, Spain, during the total solar eclipse on Aug. 12, 2026. Left image credit: Predictive Science Inc.; right image credit: DEB Initiative Team/Zack Stockbridge
Over the coming months, scientists will analyze the observations and images captured during the solar eclipse on Aug. 12 and present what they have learned about the Sun and its effects on our home planet. These observations will also help prepare science teams to investigate future solar eclipses, such as a much longer total solar eclipse that will be visible from southern Spain and northern Africa on Aug. 2, 2027.
Starstruck: NASA Research Shows How Sun’s Ancient History Shaped Earth
At the center of our solar system, the Sun influences every planet that orbits it. In two recent NASA-funded studies, scientists uncovered how ancient events in the Sun’s history may have helped create Earth’s unique climate and driven previously unexplained climatic shifts.
In new research, scientists at NASA’s SHIELD (Solar Wind with Hydrogen Ion charge Exchange and Large-Scale Dynamics) center — one of NASA’s DRIVE (Diversify, Realize, Integrate, Venture, Educate) Science Centers — trace the trajectory of the heliosphere, the massive bubble created by our Sun that envelops our solar system, as it moved through our galaxy and influenced Earth’s climate along the way. In another paper, a NASA scientist and coauthors investigate how the younger, dimmer Sun managed to heat Earth by seeding the production of potent greenhouse gases.
A Sun on the move
Over the last tens of millions of years, Earth’s climate has undergone significant shifts, including notable ice ages in which the global average temperature temporarily dropped by several degrees. During these periods, more frequent climate swings led Earth to warm and cool. To explain these periods of warming and cooling, scientists looked to factors internal to Earth, including orbital changes, greenhouse gases, and ice. But new research suggests changes to the Sun’s environment may be key to understanding Earth’s temperature swings.
Just as our planet is encased by an atmosphere, so our entire solar system is encased inside a kind of “atmosphere” created by the Sun. This protective bubble, known as the heliosphere, is formed by a continuous solar wind of charged particles streaming out from the Sun in all directions.
This conceptual animation begins with a view of the Milky Way Galaxy. As we zoom in, we travel to the Local Interstellar Cloud, and then to the heliosphere, the protective bubble that surrounds our solar system. The heliosphere is formed by a continuous stream of charged particles from the Sun, called the solar wind.
NASA’s Goddard Space Flight Center Conceptual Image Lab
Our heliosphere orbits around the center of our galaxy, the Milky Way. Throughout the Sun’s 4.6-billion-year existence, our heliosphere has traversed various regions within our galaxy. In a paper published on Aug. 21 in Annual Review of Astronomy and Astrophysics, researchers at NASA’s SHIELD used computer modeling to reverse-engineer the path of the heliosphere through our galaxy, revealing that the environments it passed through may have triggered changes on Earth.
Merav Opher, SHIELD’s principal investigator at Boston University, and her team ran simulations that showed the Sun has encountered frigid expanses of gas and dust at least three different times in the past few million years. In these instances, massive interstellar “cold clouds” pushed against the heliosphere to such an extent that it shrank to smaller than Earth’s orbit, stranding our planet outside the Sun’s protective shield.
These exposures — approximately 2 to 3 million years, 6 to 7 million years, and 13 to 14 million years ago — would have exposed Earth’s atmosphere to totally different surroundings. The simulation results match geologic evidence: Elements prevalent in interstellar dust appear in deep-sea sediment core samples, Antarctic snow, and lunar samples during these timelines.
This animated illustration shows Earth and the Sun protected by the heliosphere, the massive bubble created by our Sun. As our solar system traverses through the galaxy, encounters with massive interstellar “cold clouds” pushed against the heliosphere and caused the heliosphere to shrink past Earth, exposing the planet to cosmic radiation and elements from interstellar space.
NASA’s SHIELD DRIVE Science Center/Merav Opher/Harvard Radcliffe Institute
These heliosphere collapse events may also explain ancient climatic patterns on Earth. In the simulations, when Earth’s atmosphere was exposed to a cold, dense galactic hydrogen cloud, it increased water vapor content and shifted upper-atmospheric dynamics, ultimately altering the conditions at the surface. In summary, our heliosphere’s trips through colder regions in our galaxy may be a key factor in driving some of Earth’s ancient changes in climate, including possible ice ages.
Next frontier in studying heliophysics
The SHIELD center is one of several that NASA funds to unlock the next generation of heliospheric research. As a DRIVE Science Center, SHIELD builds a team of researchers with differing expertise, approaches, and opinions to develop a model, or “digital twin,” of the heliosphere that helps reveal how the heliosphere interacts with its surroundings, including dense interstellar clouds. Understanding our unique, habitable solar system will help unravel the mysteries of life’s evolution on Earth and potentially uncover other habitable star systems.
Young Sun
In another paper, Vladimir Airapetian, a scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, focuses on a long-standing mystery of how the ancient Sun warmed early Earth enough to sustain life. Three billion years ago, the young Sun was 70% as bright as it is today. Under these dimmer conditions, Earth should have been frozen solid. Yet geological evidence shows stable liquid water already existed long before that. This puzzle — a balmy Earth under a cooler, dimmer Sun — is known as the Faint Young Sun paradox.
One clue to resolving the paradox comes from young Sun-like stars elsewhere in the galaxy. These “toddler” stars are prone to throwing fits. Specifically, data from NASA’s retired Kepler space telescope shows that young Sun-like stars regularly erupt with massive superflares, flinging high-energy particles in all directions on a daily basis. If our young Sun was like these other stars, Airapetian proposes, the barrage of high-energy solar particles could have triggered chemical reactions that were key to warming early Earth.
Airapetian’s team simulated early Earth’s atmosphere in a sealed chamber, mixing molecular nitrogen, ammonia, carbon dioxide, and carbon monoxide. They then fired protons into the mixture, simulating the onslaught of particles from superflares. This proton bombardment triggered several changes including the production of nitrous oxide, a greenhouse gas 300 times more potent than carbon dioxide. The research was published in Astrophysical Journal Letters.
This nitrous oxide could help Earth hold onto heat. But not all the nitrous oxide would last. The young Sun’s intense ultraviolet radiation would break some of it down, splitting the molecule back into nitrogen and oxygen. But even if only 10% of the nitrous observed in the experiment survived, Airapetian’s team’s computer simulations confirmed, it would still warm Earth’s equatorial regions to about 41 degrees Fahrenheit (5 degrees Celsius), above water’s freezing point. This smaller amount of nitrous could even accelerate prebiotic synthesis: just-above-freezing temperatures have been found to be more efficient for building complex chains of amino acids than warmer temperatures.
Unearthing secrets of our star-planet system
Together, these two studies show that the Sun can lead to surprising implications for Earth. While our planet stands alone in many ways, it was formed and has always existed as part of a star-planet system. Understanding that unique relationship promises new insights about both Earth and the star that sustains it.
Use the Moon to find Antares and the Teapot, spot brilliant Venus, welcome the equinox, and see the Harvest Moon near Saturn and Neptune.
Skywatching Highlights
Sept. 14-20: Use the Moon to find Antares and the Teapot; dark skies may reveal the Milky Way center
Sept 18: Venus reaches peak brilliance for this evening appearance
Sept. 22: September equinox; fall begins in the Northern Hemisphere and spring in the Southern Hemisphere
Sept. 26: Harvest Moon rises near Saturn and Neptune
Birds fly over a barn as a harvest Moon rises.
Mike Linnihan
Transcript
The Moon joins a tea party… Venus cranks up the brightness… the seasons officially change… and the Harvest Moon meets up with some planetary neighbors.
That’s What’s Up for September.
A sky chart looking southwest after sunset on Sept. 20, 2026.
NASA/JPL-Caltech
From September 14 through 20, let the Moon guide you to a few celestial landmarks. About an hour after sunset, look south to find the Moon in the evening sky.
Night by night, the Moon shifts position against the background stars, passing near Antares.
This bright, reddish star marks the heart of the constellation Scorpius.
Next you’ll see the Teapot, a group of stars in neighboring Sagittarius that really does resemble a teapot, complete with a handle, lid, and spout.
If you are under an especially dark sky… you may see hazy steam rising from the Teapot’s spout. Follow that steam to its thickest part, and you’ll be looking toward the center of our Milky Way galaxy.
A sky chart looking west after sunset on Sept. 18, 2026.
NASA/JPL-Caltech
Look west on September 18 as Venus hits peak brilliance, shining at its brightest of this evening appearance..
You won’t have to search hard to find it. Shortly after sunset, Venus will stand out as a brilliant point of light low above the western horizon, outshining every star around it. A clear view of the horizon will give you the best chance to catch it before it sets.
On September 19, celebrate International Observe the Moon Night!
People around the world are invited to look up and connect with our nearest celestial neighbor while learning more about lunar science, exploration, and the many ways the Moon has shaped cultures around the world. Find an event near you — or learn how to participate from wherever you are — at go.nasa.gov/ObserveTheMoon.
Then on September 22, it’s officially fall in the Northern Hemisphere …while spring begins in the Southern Hemisphere.
That’s the September equinox, when the Sun is directly above Earth’s equator and day and night are close to equal in length around the world.
From there, daylight keeps getting shorter in the Northern Hemisphere and longer in the Southern Hemisphere.
A sky chart looking east after sunset on Sept. 26, 2026.
NASA/JPL-Caltech
And on September 26, the Harvest Moon takes center stage, rising in the east shortly after sunset.
It won’t be alone. Saturn appears nearby, with faint Neptune completing a wide triangle in the sky.
Saturn is the easy one-you can see it with just your eyes. Neptune is a bit more challenging. At around magnitude 8, it’s too faint to see with the unaided eye …so you’ll need binoculars or a telescope to spot it. Darker skies and good observing conditions can help bring it into view.
Here are the phases of the Moon for September.
The phases of the Moon for September 2026.
NASA/JPL-Caltech
You can stay up to date on all of NASA’s missions exploring the solar system and beyond at NASA Science. I’m Raquel Villanueva from NASA’s Jet Propulsion Laboratory, and that’s What’s Up this month.
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George Wythe, Richard Henry Lee and Thomas Nelson Jr., three of Virginia’s seven delegates who signed the Declaration of Independence, helped shape America.
Army Sgt. William Shemin, a rifleman, posthumously received the Medal of Honor in 2015 for extraordinary heroism during World War I combat operations in France.
Approximately 300 cadets participated in the Space Force’s Azimuth program throughout the summer at the U.S. Air Force Academy in Colorado Springs, Colo., where they gained exposure to its missions, organizations and guardian culture.
Joseph Hewes, William Hooper and John Penn represented North Carolina at the Second Continental Congress and signed the Declaration of Independence on July 4, 1776.
