Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
Andromeda Before and After Photoshop
Explanation: What does the Andromeda galaxy really look like? The featured before image shows how our Milky Way Galaxy‘s closest major galactic neighbor really appears in a long exposure through Earth‘s busy skies and with a digital camera that introduces normal imperfections. The picture is a stack of 223 images, each a 300 second exposure, taken from a garden observatory in Portugal during 2019. Obvious image deficiencies include bright parallel airplane trails, long and continuous satellite trails, short cosmic ray streaks, and bad pixels. In the after image, these imperfections were actually not removed with Photoshop specifically, but rather greatly reduced with a series of computer software packages that included Astro Pixel Processor, DeepSkyStacker, and PixInsight. All of this work was done not to deceive you with a digital fantasy that has little to do with the real likeness of the Andromeda galaxy (M31), but to minimize Earthly artifacts that have nothing to do with the distant galaxy and so better recreate what M31 really does look like.
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
Mirrored Meteor and Milky Way
Explanation: On August 15, this perseid meteor streaked through night skies over the Observatorio del Roque de los Muchachos at La Palma, Canary Islands, Spain. The bright and colorful meteor trail was captured next to the central Milky Way, whose dark interstellar dust clouds and luminous starlight reach above the horizon. In the foreground of this tantalizing celestial scene is the 23 meter diameter mirror of the prototype Large-Sized Telescope (LST-1). LST-1 is the first telescope constructed at the northern hemisphere site of the innovative Cherenkov Telescope Array Observatory. With 198 hexagonal mirror segments and a large, high-efficiency, pixelized camera, LST-1 is designed to detect extremely brief, atmospheric visible light flashes. Lasting about a billionth of a second, the visible light flashes are triggered by energetic gamma-rays from cosmic sources such as distant active galaxies and gamma-ray bursts. Of course, on that night some individual mirror segments of LST-1 also reflected the atmospheric flash of the bright perseid meteor.
Boeing’s Starliner spacecraft that launched NASA’s Crew Flight Test astronauts Butch Wilmore and Suni Williams to the International Space Station is pictured docked to the Harmony module’s forward port.
Credit: NASA
During a news conference at 3 p.m. EDT on Monday, Sept. 28, NASA and Boeing leadership will discuss Starliner’s development and plans for regular crew flights to and from the International Space Station.
Dana Weigel, manager, NASA’s Low Earth Orbit Program
Woody Hoburg, NASA astronaut
John Mulholland, vice president and program manager, Boeing Commercial Crew
Media already credentialed for Crew-13 may participate in person at NASA’s Kennedy Space Center in Florida. To ask questions, media must request the dial-in number from the Kennedy newsroom by emailing: ksc-newsroom@mail.nasa.gov no later than one hour prior to the start of the call. A copy of NASA’s media accreditation policy is online.
For NASA’s blog and more information about the agency’s missions, visit:
Minister of Industry and Technological Research Rossano Fabbri signed on behalf of San Marino, together with Gregory Mann, NASA Europe representative, and U.S. Consul General in Florence Joseph Tordella, on Friday, Sept. 25, 2026.
Credit: U.S. Department of State
The Republic of San Marino became the 76th signatory to the Artemis Accords during a ceremony in the town of Rimini on Friday with NASA and U.S. Department of State officials present.
“San Marino joins a growing coalition of like-minded nations committed to the peaceful, transparent, and responsible exploration of space,” said NASA Deputy Administrator Matt Anderson. “President Trump has directed NASA to build a Moon Base and establish an enduring presence on the lunar surface. As we do, we are putting the principles of the Accords into practice. NASA has invited every Artemis Accords signatory to participate in our return to the Moon through scientific payloads, technology demonstrations, CubeSats, and other capabilities. San Marino is already looking toward that future.”
Minister of Industry and Technological Research Rossano Fabbri signed on behalf of San Marino. Gregory Mann, NASA Europe representative, participated in the ceremony with the U.S. Consul General in Florence Joseph Tordella.
“We are pleased and honored that the Republic of San Marino has been welcomed as the 76th signatory state of the Artemis Accords,” said Fabbri. “We fully share the principles and values expressed in the Artemis Accords, and we are convinced that the signatory states united under the Accords will make a tangible contribution to promoting international cooperation in space and ensuring the use of space for peaceful purposes.”
In 2020, NASA and the State Department joined with seven other founding nations to establish the Artemis Accords, responding to the growing interest in lunar activities by both governments and private companies. They introduced the first set of practical principles aimed at enhancing the safety and coordination between nations as they explore the Moon, Mars, and beyond, committing nations to:
Explore peaceably and transparently
Render aid to those in need
Enable access to scientific data
Ensure activities do not interfere with those of others
Preserve historically significant sites and artifacts by developing best practices
By signing the Artemis Accords, nations open the door to opportunities for future lunar exploration with NASA, advancing humanity’s return to the Moon, and shaping the Golden Age of exploration and innovation.
Spacecraft propulsion traditionally relies on volatile fuels and separate, bulky systems for different types of maneuvering in space. NASA is working to change that paradigm. Engineers at NASA’s Marshall Space Flight Center in Huntsville, Alabama, recently completed a rigorous series of environmental and physical tests on a new small satellite designed to make spaceflight safer and more efficient.
The ASCENT (Advanced Spacecraft Energetic Non-Toxic) Propulsion Dual Mode mission is a flight demonstration of a spacecraft about the size of a large shoebox. The mission will test a single, integrated propulsion system that uses a common fuel tank to feed two different types of engines.
Dr. Nehemiah Williams, the demonstration’s project manager at NASA, prepares to start testing the mission’s flight hardware in a clean room at NASA’s Marshall Space Flight Center in Huntsville, Alabama. The mission will demonstrate a single, non-toxic propulsion system that combines both high-thrust and low-thrust capabilities into a common tank.
NASA/Charles Beason
Typically, spacecraft carry two separate propulsion systems to navigate: a high-thrust chemical system for rapid movements like entering orbit, and a low-thrust electric system for highly efficient, slow maneuvers like maintaining a position. This requires multiple fuel tanks and heavy plumbing, which eats up valuable space and weight.
The spacecraft being developed uses a single non-toxic propellant called ASCENT. By feeding both a high-thrust combustion engine and low-thrust electrospray thrusters from one central tank, the spacecraft saves critical mass and volume. For future missions, this means more room for scientific instruments and the ability to launch on smaller, less expensive rockets.
Bringing this concept to flight requires a nationwide collaborative effort. While NASA Marshall manages the mission, the spacecraft relies on electrospray thrusters developed by the Massachusetts Institute of Technology, a chemical propulsion module built by Plasma Processes, and a spacecraft bus integrated by the Georgia Institute of Technology.
“There are a lot of odds and ends, and a lot of small challenges and some big ones,” said Nehemiah Williams, the demonstration’s project manager at NASA Marshall. “But ensuring the functionality of the propulsion system across all these different teams is what makes the mission successful.”
Before a spacecraft can safely operate in the harsh environment of low Earth orbit, it must pass a battery of tests on the ground. Over the past few months, the engineering team at Marshall has put the flight hardware through its paces inside the center’s Small Spacecraft Servicing and Integration Lab.
To verify the integrity of the unified propulsion system, the team conducted extensive leak testing. Engineers performed a pressurized helium leak test of the spacecraft inside a vacuum chamber to ensure the integrity of the spacecraft’s seals, successfully proving those seals were working as intended. Because the system shares a single tank of ASCENT propellant to feed two different thruster types, ensuring that the fuel lines and valves are perfectly sealed is vital for mission safety and success.
Propulsion subject matter expert Chris Burnside left, and propulsion lead Ebony Bland, right, prepare the mission’s flight hardware for testing inside a clean room at NASA’s Marshall Space Flight Center in Huntsville, Alabama. The 6-U CubeSat recently underwent rigorous spin, thermal vacuum, and leak tests to ensure its innovative, non-toxic propulsion system is ready for the extreme environment of space.
NASA/Charles Beason
The team also subjected the spacecraft to thermal vacuum testing. Space is an unforgiving environment characterized by a total lack of air and extreme temperature swings. By placing the spacecraft inside a specialized vacuum chamber that mimics these harsh conditions, engineers can ensure that the electronics, thrusters, and mechanical systems will operate normally once in orbit.
Additionally, the spacecraft underwent a spin test. Just like a tire on a car, a spacecraft needs to be perfectly balanced. The spin test measures the spacecraft’s mass properties and center of gravity. This validates the CubeSat’s ability to stably fly and maintain the correct attitude, allowing its antennas to communicate with Earth and its solar panels to accurately catch the Sun’s rays.
With the environmental and physical testing now complete, the mission is entering its final stages of preparation. The team will complete the final system checkouts, integrate the spacecraft’s solar arrays, and ship the hardware to its launch destination.
The ASCENT Propulsion Dual Mode mission is manifested to launch no earlier than October 1 as a payload aboard a SpaceX Falcon 9 rocket from Vandenberg Space Force Base in California.
Once deployed into an orbit about 325 miles above Earth, the spacecraft will begin a nine-month mission. After an initial checkout period, the operations team will execute short chemical and electric maneuvers. If successful, the spacecraft will spend several months performing multiple orbit-raising and lowering maneuvers, alternating between its high-thrust and low-thrust engines to prove the dual-mode concept works in space.
The ASCENT Propulsion Dual Mode mission is managed and funded by NASA’s Small Spacecraft & Distributed Systems (SSDS) within the agency’s Research and Technology Mission Directorate at NASA Headquarters in Washington. SSDS is based at NASA’s Ames Research Center in California’s Silicon Valley.
After rapidly intensifying, Hurricane Polo spins off Mexico’s Pacific coast on September 23, 2026 (left), over unusually warm waters (right). NASA Earth Observatory images by Michala Garrison, using data from the MODIS (Moderate Resolution Imaging Spectroradiometer) on NASA’s Aqua satellite and the MUR SST (Multiscale Ultrahigh Resolution Sea Surface Temperature) project.
In mid-September 2026, Hurricane Polo began as a tropical disturbance off the Pacific coast of Mexico. By September 20, it was organized enough to qualify as a tropical depression, and by the next day it was a tropical storm.
From there, Polo launched into a period of rapid intensification that left meteorologists searching for adjectives strong enough to convey what was happening. Some described the storm’s rate of intensification and strength as “jaw-dropping,” others as “astonishing,”and others as “absolute insanity.”
“Polo went through a period of what can only be described as explosively rapid intensification,” said Gary Partyka, an atmospheric scientist with the Global Modeling and Assimilation Office (GMAO) at NASA’s Goddard Space Flight Center, in an email. “This was RAPID, rapid intensification.”
The storm was in an environment that was “near perfect” for strengthening, Partyka said, characterized by weak wind shear, high moisture, warmer ocean temperatures, and high levels of atmospheric instability.
Several observers leaned on extreme rapid intensification—a technical classification meaning the storm’s wind speeds increased at least 60 knots (111 kilometers or 69 miles per hour) within a 24-hour period. By September 22, the storm’s maximum sustained wind speed had risen by 90 knots (167 kilometers per hour or 104 miles per hour) within 24 hours, hitting category 5 strength. In its normally staid forecast discussions, the National Hurricane Center called the intensification “truly remarkable.”
When NOAA’s Hurricane Hunter aircraft flew over the storm on September 22, researchers estimated winds of nearly 285 kilometers (180 miles) per hour. That would make it the third-strongest storm on record in the eastern Pacific by maximum sustained winds and the fastest on record to go from a tropical depression to a category 5 storm, according to some analysts.
On the afternoon of September 23, when the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured this image (left), Polo was churning off the coast of Guerrero, southwest of Acapulco. With maximum sustained winds of 230 kilometers (145 miles) per hour, the storm was category 4 strength when the image was acquired, having undergone an eyewall replacement cycle that weakened it slightly.
“The satellite imagery of Polo is very impressive, with the storm’s large, clear eye and extensive outflow pattern,” said Kristen Corbosiero, an atmospheric scientist at the State University of New York at Albany, who is working on a NASA project that uses satellite data to study tropical cyclone ventilation. “Weak winds above the system and good outflow at the top of the system also contributed to Polo’s rapid intensification.”
As Polo developed, it moved over areas where sea surface temperatures were as high as 32 degrees Celsius (90 degrees Fahrenheit)—2 to 3 degrees warmer than usual for September 23. Surface waters across much of the region were above 27.8°C (82°F), the temperature generally required to sustain and intensify hurricanes.
The map above (right) is based on data from the Multiscale Ultrahigh Resolution Sea Surface Temperature (MUR SST) project at NASA’s Jet Propulsion Laboratory, which blends satellite measurements from NASA, NOAA, and international missions with observations from ships and buoys. Rather than absolute temperatures, the map shows anomalies—how much warmer or cooler the ocean surface was on September 23, 2026, than the project’s 2003-2014 average for that date.
While the map above conveys temperatures at the water surface, the presence of warm water deeper in the column has likely contributed to the storm’s staying power, Corbosiero added. Sometimes hurricanes churn up cooler water from deep in the column that can slow a storm’s intensification, but in this case the cool water wake behind the storm appears minimal, and measurements and models show high ocean heat content at considerable depths.
Both Partyka and Corbosiero cautioned against attributing Polo’s rapid intensification directly to El Niño’s unusually warm surface temperatures in the central and eastern Pacific Ocean. Several hurricanes in this region have undergone rapid intensification in the past during La Niñaand neutral conditions, Corbosiero noted, including Hurricane Otis in 2023 and Patricia in 2015, both category 5 storms.
However, the overall amount of tropical cyclone activity in the eastern Pacific does typically increase during El Niño due to changes in large-scale ocean and atmospheric circulation patterns, and that’s what has happened so far in 2026. As of September 24, the accumulated cyclone energy in the region was nearly twice the norm, according to data from Colorado State University.
NASA’s SpaceX Crew-14 crew members during preflight training at SpaceX’s facility in Hawthorne, California (from left, Roscosmos cosmonaut Arutyun Kiviryan, NASA astronaut Chris Birch, NASA astronaut Kayla Barron, and JAXA (Japan Aerospace Exploration Agency) astronaut Makoto Suwa).
Credit: SpaceX
Four crew members from three space agencies will launch to the International Space Station no earlier than spring 2027 for a long-duration science expedition as part of NASA’s SpaceX Crew-14 mission.
NASA astronauts Kayla Barron and Chris Birch will serve as spacecraft commander and pilot, with JAXA (Japan Aerospace Exploration Agency) astronaut Makoto Suwa, and Roscosmos cosmonaut Arutyun Kiviryan as mission specialists. After docking, Crew-14 will join the space station’s Expedition 75/76.
This mission is the 14th commercial crew rotation with SpaceX under NASA’s Low Earth Orbit Program. The crew will conduct scientific investigations and technology demonstrations to help prepare humans for future exploration missions to the Moon and Mars and to benefit people on Earth.
This will be Barron’s second flight to the space station. She was selected as a NASA astronaut in 2017. Barron earned a bachelor’s degree in systems engineering from the U.S. Naval Academy in Annapolis, Maryland and a master’s degree in nuclear engineering from the University of Cambridge in England. A commander in the U.S. Navy, Barron earned her submarine warfare officer qualification, deploying three times aboard the USS Maine. She first launched to the space station in 2021 aboard NASA’s SpaceX Crew-3 mission, spending a total of 177 days in space across space station Expeditions 66/67. She completed two spacewalks and served as lead robotics operator for another. Most recently, Barron supported the development of new technologies and operational concepts for NASA’s Artemis program.
Selected as a NASA astronaut in 2021, Birch graduated from the University of Arizona in Tucson with degrees in mathematics and biochemistry and molecular biophysics. She earned a doctorate in biological engineering from the Massachusetts Institute of Technology, and later taught bioengineering at the University of California, Riverside, and scientific writing and communication at the California Institute of Technology in Pasadena. Birch competed as a decorated track cyclist on the U.S. National Team and was named to the Olympic Long Team for the 2020 Tokyo Games. She has served as a capsule communicator, supporting crews aboard the space station and during the Artemis II mission. Birch was crew lead for Expedition 72, working with flight control teams to help manage daily operations, and served as a crew representative for NASA’s Orion Program, supporting Artemis II mission development and operations. This will be her first spaceflight.
The Crew-14 mission also is the first spaceflight assignment for Suwa. Before JAXA selected him as an astronaut candidate in 2023, Suwa spent nearly a decade with the World Bank Group. Previously, he served in Rwanda as a Japan Overseas Cooperation Volunteer before joining the United Nations World Meteorological Organization. Suwa holds a doctorate in geosciences from Princeton University and completed basic training to become certified as an astronaut in 2024.
This mission will be Kiviryan’s first trip to the space station. He graduated from Saint Petersburg Suvorov Military School in 2010 and later studied at the Baltic State Technical University. He graduated in 2015 as an engineer specializing in rocket science and completed training in the operation of computer-controlled machines. Kiviryan was selected for the Gagarin Research and Test Cosmonaut Training Center Cosmonaut Corps in 2021 and has served as a test cosmonaut since 2023.
For more than 25 years, people have lived and worked continuously aboard the International Space Station, advancing scientific knowledge and making research breakthroughs that aren’t possible on Earth. The space station helps NASA understand and overcome the challenges of human spaceflight, expand commercial opportunities in low Earth orbit, and build on the foundation for long-duration missions to the Moon, as part of the Artemis program, and to Mars.
Learn more about International Space Station research and operations at:
Preparations for Next Moonwalk Simulations Underway (and Underwater)
NASA announced the winners of the Deep Space Food Challenge: Mars to Table Thursday, with the top $300,000 prize being awarded to Chinyere Ukeje of Philadelphia, Pa. for the Adaptive Nourishment Infrastructure (ANI) food system concept. This competition challenged solvers to explore innovative solutions for integrated space food systems that would provide safe, nutritious meals to astronauts living and working in space.
Mars to Table launched in January 2026 as a follow on to the Deep Space Food Challenge, which NASA ran from 2021-2014 in collaboration with CSA (Canadian Space Agency). The original challenge focused on prototyped novel food production methods, while the 2026 competition asked teams to conceptualize space meals not as individual technology components, but as a complete food-production system that would offer a variety of food with limited crew time and work needed to maintain the food system. After judging 113 submissions by teams hailing from 33 countries and 28 U.S. states, the agency selected five winning teams for the 2026 challenge, awarding a combined $650,000.
“We’re thrilled to keep advancing the future of space food systems with this challenge,” said Jennifer Edmunson, program manager for Centennial Challenges at NASA’s Marshall Space Flight Center in Huntsville, Alabama. “The future of human space exploration will rely on innovative food systems, and it is amazing how much ingenuity this challenge has helped us identify from participants near and far.”
Currently, astronaut meals are almost entirely cooked, packaged, and sent to the International Space Station from the Space Food Systems Laboratory at NASA’s Johnson Space Center. A one-way trip to Mars will take at least nine months, so bringing all required meals will not be sustainable for such missions. From shelf stability issues to mass restrictions, pre-packaged foods cannot be the default option for future Martian astronauts.
In search of viable solutions for future space food operations, teams were tasked with ideating and designing systems in response to a mission scenario that addressed a 15-person astronaut crew for 500 Martian sols, or about 513 Earth days. The challenge focused on surface operations and system integration, and each team delivered a design layout, meal plan, concept of operations, and walkthrough video.
“The criteria we laid out for this competition were challenging, but intentionally so,” said Mars to Table head judge Dr. Alexander Meyers, who supports NASA Centennial Challenges through Noetic Strategies from the agency’s Kennedy Space Center in Florida. “This challenge spotlights the complexity of a complete space food system and the human ingenuity required to solve these problems. Every new idea presented in this challenge represents a possible new tool in NASA’s plans for the future of space exploration.
NASA named five winners of the Mars to Table Challenge. These technologies provide NASA with inspirational launching pads for future deep space food systems.
The first-place winner, Chinyere Ukeje, developed the concept of ANI, a modular food ecosystem combining controlled-environment agriculture, fermentation and fungi cultivation, and closed-loop nutrient recycling through bioreactors with limited Earth-provisioned foods to produce 50% of the food away from Earth. ANI, named after the Nigerian Earth goddess of harvest and fertility, envisions a system that cooks fresh meals daily and has provisions to work through shortages of power, water, equipment, or crew time.
The second-place prize of $200,000 was awarded to Cislune of Rosemead, Calif. for the Fresh, Ferment, Reserve food infrastructure. The proposed system grows model-selected crops, converts part of the harvest into familiar foods in instrumented culture cassettes, and uses a protected Earth-loaded reserve to supplement in cases of biological variability, utility curtailment, and rejected batches.
Additional prizes include:
Applied Frameworks Award ($50,000): Ohā Kanu from Hilo, Hawaii with ʻOhā Kanu: An Ahupuaʻa-Inspired Food System for Mars
Mission Simulation Award ($50,000): Orbital Health Systems, Inc. from Evansville, Ind. with New Lunar Settlers Cookbook (Mars Edition)
Human-Centered Design Award ($50,000): Autonomic Resilience Collective from Bentonville, Ark. with Adaptive Endurance and Growth through Integrated Sustenance (AEGIS) Mars
NASA also recognized one international team:
International Winner: Astrofood from Ellezelles, Belgium with Food Resilience Ecosystem for Space Habitats (FRESH)
The Deep Space Food Challenge: Mars to Table is managed at NASA Marshall by Centennial Challenges, part of the Prizes, Challenges, and Crowdsourcing Program within NASA’s Research and Technology Mission Directorate. The challenge is also supported by NASA’s Division of Biological and Physical Sciences, Heliophysics Division, Planetary Science Program, Human Research Program, and Earth Science Division.
Centennial Challenges have a legacy of more than 20 years engaging the public to solve complex problems that benefit NASA’s broader initiatives. Past challenges have spurred advances in robotics, additive manufacturing, power and energy, textiles, chemistry, and biology.
The Deep Space Food Challenge: Mars to Table is also supported by subject matter experts at NASA Johnson and NASA Kennedy. The Methuselah Foundation and Floor23 Digital support the administration of this challenge.
