Thursday, 3 September 2026

Peatland Fires Darken Skies in Indonesia

No Fire Detections
Fire Detections

Thick gray plumes of smoke stream from large numbers of fires scattered across the island of Borneo.
Thick gray plumes of smoke stream from large numbers of fires scattered across the island of Borneo.
NASA Earth Observatory / Lauren Dauphin

The locations of MODIS fire detections are depicted with small red circles. Most are visible on the southern side of the island.
The locations of MODIS fire detections are depicted with small red circles. Most are visible on the southern side of the island.

Thick gray plumes of smoke stream from large numbers of fires scattered across the island of Borneo.
Thick gray plumes of smoke stream from large numbers of fires scattered across the island of Borneo.
NASA Earth Observatory / Lauren Dauphin
The locations of MODIS fire detections are depicted with small red circles. Most are visible on the southern side of the island.
The locations of MODIS fire detections are depicted with small red circles. Most are visible on the southern side of the island.

No Fire Detections

Fire Detections


If there were an apex predator among fires, tropical peatland fires would be a top contender. These fires, which burn in dried wetland soils, are slow-burning, highly polluting, and notoriously difficult to extinguish because they smolder at low temperatures and often burn underground through expansive deposits of peat. By one estimate, peat fires generate three times more fine particulate matter than other tropical forest fires, five times more sulfur dioxide, three times more organic carbon, and two times more methane and carbon monoxide.

Fire season was underway in Indonesia when the MODIS (Moderate Resolution Imaging Spectroradiometer) on NASA’s Aqua satellite captured this image on September 1, 2026. In the map on the right, each red dot depicts one “fire detection.” A fire detection is a pixel in which the sensor and an algorithm determined there were thermal anomalies indicative of fire. Multiple detections can be generated by a single fire.

Peat fires are a recurring challenge in Indonesia, which is home to about 36 percent of the world’s tropical peatlands. When parched by drought, the archipelago’s peat landscapes have become unrelenting infernos on several occasions over the past three decades, with fires producing blankets of smoke for weeks on end and upending daily life for millions of people.

While fires occur in Indonesia every year, previous El Niño years—1997 and 2015 especially—produced the most extreme burning in recent decades. The climate pattern, assessed by NOAA as present and strengthening in August, typically leads to sharp reductions in rainfall in Indonesia, particularly when combined with a positive phase of the Indian Ocean Dipole, which was also present.

“Indonesia is only about three weeks into its fire season, but we’re seeing fire activity track sharply upward, similar to 2015,” said Robert Field, a Columbia University researcher who developed a tool called the Global Fire Weather Database that produces experimental, real-time fire weather forecasts. “The strong El Niño is making the dry season drier over the fire-prone parts of the country and exacerbating burning—just as we anticipated it would,” he said. In 2015, after burning for more than three months, Indonesia’s fires had released 1.75 billion tons of greenhouse gas equivalents—more than Japan emits in a year. As of September 2, Indonesia’s 2026 fires, having burned for about a month, have released roughly 10 percent as much as the 2015 fires.          

As in 2015, Indonesia was in the midst of a severe and widespread drought in summer 2026. About 90 percent of the country received little to no rainfall in early August, according to data from the Indonesian meteorological agency. Normally, it’s too wet for fires to spread through underground peat deposits in Kalimantan, Sumatra, and Papua, but they can in dry conditions. “Surface fires are less of a concern, but when fires get underground, they just won’t stop,” Field said. “They’ll keep burning until the rains come in October or November.” 

The Indonesian government uses NASA and NOAA observations from the MODIS and VIIRS sensors to track active fires in near-real-time. Indonesia’s Ministry of Forestry MODIS- and VIIRS-based fire-monitoring platform SiPongi, for instance, tallied 946 hotspots on August 31, 2026.

However, it’s difficult for MODIS and VIIRS to detect fires through thick smoke or clouds, within the forest understory, or underground in peat deposits. When Indonesian fires become the most intense, the number of fires recorded by VIIRS or MODIS can actually decrease. “The worst smoke events, paradoxically, can be the hardest to observe from space with MODIS and VIIRS,” said Mark Cochrane, an ecologist at the University of Maryland Center for Environmental Science who has conducted field research on peat fires in Indonesia for nearly a decade.

The large-scale construction of irrigation canals and drainage of peat swamps in the 1990s, part of an effort to establish massive rice farms, contributed to the flammability of the region today by significantly lowering the water table in wetland areas, Cochrane said. He also noted that oil palm and other plantation forestry is common in this region. Yet after an unusually grim fire season in 2015, governments and other organizations have worked to dam up some irrigation canals and restore wetlands. There have also been renewed efforts to improve firefighting capacity and reduce the number of fires that people accidentally ignite.

“This year will be a real stress test of the measures that were put in place after 2015,” said Shi Jun Wee, a University of Maryland graduate student. Wee is working on a team partnering with NASA and MapBiomas to develop new algorithms and techniques to detect more understory fires than MODIS and VIIRS can by tapping into shortwave infrared observations from Landsat and Sentinel-2 satellites. As the fires progress, he plans to track developments using NASA’s Worldview data browser, FIRMS (Fire Information for Resource Management System), HLS (Harmonized Landsat and Sentinel-2) observations, and GFED (Global Fire Emissions Database).

On the ground in Indonesia and neighboring countries, the smoke is already causing widespread disruptions. Indonesian officials have warned that large swaths of the population have been exposed to hazardous smoke. Some schools started shifting to remote learning, nine national parks have closed, and several flights have been delayed due to heavy smoke, according to news reports.

“People tend to focus on these fires during an El Niño and then forget about them,” Cochrane said. “We need sustained focus, even during the years when they aren’t as bad, to solve this,” he said. “These fires create a tremendous amount of emissions.”

NASA Earth Observatory image by Lauren Dauphin, using MODIS data from NASA EOSDIS LANCE and GIBS/Worldview. Story by Adam Voiland.

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The locations of MODIS fire detections are depicted with small red circles. Most are visible on the southern side of the island.

September 1, 2026

JPEG (3.34 MB)

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APOD: 2026 September 2 – Solar Eclipses and Culture

APOD

Astronomy Picture of the Day

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.

Solar Eclipses and Culture

Explanation: Pretend you have never heard of a solar eclipse. The Sun’s behavior has been predictable your whole life. One day, you witness the sky transform as it does in today’s spliced image spanning two hours of the August 12, 2026 solar eclipse. The Sun disappears, leaving behind a bright, empty ring. What would you think had happened? Humans have interpreted eclipses in countless ways throughout history, embedding beliefs about connection, rebirth, or danger into culture. “Eclipse” comes from the Greek word “ékleipsis” meaning “abandonment”. In ancient Greece, the solar eclipse marked the anger of the gods and the Sun abandoning humanity. To the Diné people, this celestial alignment is a time of renewal. Out of respect and to avoid the danger of sunlight, the Diné stay inside until the Sun and Moon separate. The Batammariba people of Benin and Togo believe that the Sun and Moon fight during an eclipse, so the community encourages peace among themselves. Eclipses are an example of the longstanding connection between astronomy and society.

Gallery: Solar Eclipse of 2026 August 12
Tomorrow’s picture: a bird’s eye view

Date: September 2, 2026
Credit & Copyright: Javier Castro
Authors & editors: Keighley Rockcliffe, Robert Nemiroff, Jerry Bonnell, Cecilia Chirenti
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.

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Wednesday, 2 September 2026

NASA Rocket Takes First Multi-Point Look Inside Radio-Disrupting Clouds

High above Earth, thin veils of metallic haze drift through the edge of space. Known as sporadic E layers, these high-altitude “clouds” form from the vaporized dust of burnt-up meteors, earning their name from the unpredictable way they emerge and then dissipate. Now, new results from a NASA sounding rocket — a suborbital research rocket — that flew five detectors through one of these layers simultaneously reveal unexpected complexity in the layer for the first time.

Though invisible to the eye, sporadic E layers make their presence known to the radio signals we rely on for long-distance communication. When present, sporadic E can send those signals ping-ponging off in unexpected directions, rendering the technology temporarily unreliable.

Scientists have long sought a fuller understanding of these radio-disrupting clouds, but until recently, they had only sampled them one narrow slice at a time. The rocket, called the sporadic E Electrodynamics Demonstration, or SpEED Demon for short, launched from NASA’s Wallops Flight Facility in Virginia on Aug. 24, 2022, and demonstrated the first concurrent, multi-point view inside sporadic E.  Its results, from a team led by Embry-Riddle Aeronautical University, are described in a new study in the Journal of Geophysical Research: Space Physics.

Sporadic E layers form in the ionosphere, a region of the upper atmosphere beginning around 40 miles (60 kilometers) up where the neutral gases begin to transform into plasma, or ionized gas. Some of the particles there come from meteors, which burn up and leave behind traces of iron, magnesium, and other metals. These metals occasionally clump into dense, cloud-like sheets — the sporadic E layers — that reflect radio waves.

Digital illustration of a curved Earth with green land and blue clouds representing sporadic E layers. Two communication towers stand on the surface, sending and receiving zig-zagging magenta beams of radio signals against a starry, glowing dark blue nebula sky. Two labels appear, sporadic e layers (on the clouds) and ionosphere, above the clouds, representing the intended target of the radio beams.
An animated illustration depicts Sporadic-E layers forming in the lower portions of the ionosphere, causing radio signals to reflect back to Earth before reaching higher layers of the ionosphere.
NASA’s Goddard Space Flight Center/Conceptual Image Lab

“Sporadic E layers are, in one sense, giant mirrors of radio frequency waves in the sky,” said Aroh Barjatya, the mission’s principal investigator and a professor of engineering physics at Embry-Riddle in Daytona Beach, Florida.

When a sporadic E layer forms, signals meant to travel out to space can ricochet back toward the ground. Air traffic controllers and marine radio users may pick up distant transmissions as though they were nearby, and radars scanning beyond the horizon can register so-called “ghosts,” or false targets. The effects reach everyday technology, too.

“The biggest source of error in the GPS in your phone, for example, is from the plasma in the ionosphere, and sporadic E layers can contribute to this uncertainty,” said Henry Valentine, the study’s lead author, who conducted the work at Embry-Riddle and is now a researcher at the U.S. Naval Research Laboratory.

Because sporadic E layers hover around 60 miles (100 kilometers) up—too high for weather balloons, too low for satellites — and form and dissipate unpredictably, they have long been the province of sounding rockets, which can be launched on short notice to catch one in the act. But a single rocket flies a single path, taking measurements only along a line. Barjatya likens the situation to viewing a scene through a crack in a wall. One can only observe what is happening along that narrow slit, missing out on the crucial context of whatever is occurring to the left or right of one’s view.

The SpEED Demon mission changed that. The mission was the first to deploy ejectable probes, called dropsondes, inside a sporadic E layer. Once inside, the rocket released four dropsondes that flew away from the main payload and from one another, each measuring the plasma along its own track and beaming its measurements back to ground stations. Together with the main payload, the probes sampled the layer in a total of five places at the same moment.

A group of people in blue lab coats stands around a tall, metallic rocket component inside an industrial facility with beige protective curtains.
The SpEED Demon team poses with payload section during testing at NASA’s Wallops Flight Facility.
NASA Wallops/Berit Bland

“Now with multiple sensors, we’ve turned that crack into a picket fence,” Barjatya said.

The data revealed surprising complexity inside the sporadic E layer. Rather than a smooth, dense pancake of metallic particles, the layer that SpEED Demon flew through appeared uneven and structured, shaped by turbulent winds moving through the neutral air around it.

“A lot of times you think of sporadic E as this single sharp density layer, but what we saw in ours is it’s interacting with neutral wind and these swirling atmospheric turbulences,” Valentine said. “Rather than a flat pancake, it’s closer to a cinnamon roll.”

On the way down, the layer even split into two distinct peaks. The team found that shape was consistent with modulation by Kelvin-Helmholtz billows, the curling, wave-like instability that produces breaking-wave patterns in ordinary clouds. Because the flight was unable to measure the local winds and electric fields directly, the researchers are careful to call the billow explanation plausible rather than confirmed.

The SpEED Demon mission was designed as a technology demonstration — a test of whether the dropsonde technique would work at all. It did, and the team was quick to apply it again. Barjatya’s team used a similar multi-probe strategy to launch rockets into the paths of the October 2023 annular eclipse and April 2024 total solar eclipse, studying how the sudden darkness disturbed the upper atmosphere. In June 2025, they flew SpEED Demon’s most direct descendant, Sporadic-E ElectroDynamics, or SEED, into sporadic E layers from Kwajalein Atoll in the Marshall Islands, studying them at lower latitudes. Papers from those missions are in preparation.

A rocket launches at night, surrounded by bright flames and smoke, with a tall supporting structure visible and the dark sky in the background.
A sounding rocket launch testing science instruments for future missions was successfully conducted at 9:16 p.m. EDT, Aug. 23, 2022, from NASA Wallops Flight Facility in Virginia.
NASA

After years of study, sporadic E layers are no longer as unpredictable as they once were. “They have a seasonality to them, with peak occurrence happening in the local summer,” Barjatya said.

Questions about how and when they form are increasingly fine-grained. The new deployable multi-point rocket sensor methodology, along with ground-based measurements, is likely to bring the picture even closer to completion. “The science community as a whole is now in its final stretches of fully understanding these giant radio frequency mirrors in the sky,” Barjatya said.

By Miles Hatfield 
NASA’s Goddard Space Flight Center, Greenbelt, Md. 

About the Author

Miles Hatfield

Miles Hatfield

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NASA Selects Blue Origin as Mars Telecommunications Network Provider

NASA insignia.
Credit: NASA

NASA awarded Blue Origin a contract Tuesday to develop the agency’s Mars Telecommunications Network, a next-generation communications system that will enable reliable, high-bandwidth communications and navigation services for current and future Mars missions.

The firm-fixed-price contract has a maximum potential value of approximately $700 million to deliver a high-performance Mars telecommunications orbiter to NASA no later than Dec. 31, 2028.

Blue Origin will design, develop, integrate, launch, and operate the network as a part of the agency’s broader space communications and navigation infrastructure. The architecture will consist of a high-performance telecommunications spacecraft orbiting Mars, transmitting science data, imagery, navigation information, and critical mission communications for spacecraft operating on and around the planet.

The award marks a milestone in NASA’s strategy to expand communications and navigation services beyond Earth and the Moon, establishing the foundation for sustained exploration of Mars in the coming decades.

Under the Artemis program, NASA is sending astronauts to explore the Moon and prepare for missions to Mars. Robotic missions will pave the way for human exploration of the Red Planet, and as these missions expand, demand for data will continue to increase. To meet this need, NASA is pursuing a purpose-built network capable of supporting a growing number of missions while providing greater capacity, reliability, and operational flexibility.

The selection follows NASA’s request for proposal issued in May. As the agency increasingly taps commercial partners for transportation and communications services in Earth orbit and to develop the Moon Base, the Mars Telecommunications Network initiative similarly seeks to harness private-sector capabilities while enabling NASA to focus on exploration and scientific discovery.

The network, managed by NASA’s Space Communications and Navigation program, is expected to be operational at Mars by 2030 and will support both current and future missions to the Red Planet, as NASA ventures deeper into space.

For more information about NASA’s space communications efforts, visit:

https://www.nasa.gov/communicating-with-missions

-end-

Rob Margetta
Headquarters, Washington
202-358-0918
robert.j.margetta@nasa.gov

Rob Garner
Goddard Space Flight Center, Greenbelt, Md.
301-286-5687
rob.garner@nasa.gov

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Sep 01, 2026
Editor
Jessica Taveau


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What’s Up: September 2026 Skywatching Tips from NASA

Brilliant Venus and a Harvest Moon

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
A large, glowing full moon shines bright yellow in a dark twilight sky above a rustic red barn and silo set behind a golden harvest field, with a long V-formation of birds flying across the sky.
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.

Learn More and Get Involved

A stylized logo graphic showing silhouettes of an adult pointing toward the sky, while a child holding a telescope looks on.

Night Sky Network

The Night Sky Network is a nationwide coalition of amateur astronomy clubs bringing the science, technology, and inspiration of NASA’s missions to the general public.

A scenic landscape photograph captures a large, glowing yellow full moon rising through a thin veil of clouds during twilight. In the foreground, a vintage metal windmill stands tall on a rustic farm property, silhouetted against a backdrop of rolling, arid hills. The sky is a deep, muted blue-grey, casting a soft, serene light over the dry grass and distant ridges. The composition creates a peaceful, rural atmosphere, highlighting the dramatic scale of the moonrise over the quiet countryside.

NASA Skywatching Resources

Expert skywatching tips and more from our experts.

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Sep 01, 2026


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Peatland Fires Darken Skies in Indonesia

Science Aqua Peatland Fires Darken Skies in… Earth Earth Observatory Image of the Day EO Explorer All Topics Atmosphe...