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NASA’s Chandra Finds Young Stars Dim Quickly

2026-04-23 15:01

The images of Trumpler 3 and NGC 2353 are open clusters that contains hundreds of young stars that are gravitationally bound together because they formed from the same gas cloud. In this composite image of the clusters, X-rays from Chandra (purple) have been combined with an optical image from the PanSTARRS telescope in Hawaii (red, green, and blue). The stars look like fuzzy dots of different sizes dotting the darkness of space.
Scientists have found that young stellar cousins of our Sun are calming down and dimming more quickly in their X-ray output than previously thought, according to a study using NASA’s Chandra X-ray Observatory.
X-ray: NASA/CXC/Penn State Univ/K. Getman; Optical/IR: PanSTARRS; Image Processing: NASA/CXC/SAO/N. Wolk

These images, released on April 14, 2026, show two open star clusters, Trumpler 3 (left) and NGC 2353 (right). They represent a recent study from NASA’s Chandra X-ray Observatory that shows how young Sun-like stars are dimmer in X-rays than previously thought.

This latest study looked at eight clusters of stars between the ages of 45 million and 750 million years old. The researchers found that Sun-like stars in these clusters unleashed only about a quarter to a third of the X-rays they expected. This quieting of young stars is a benefit for the prospects for life on orbiting planets around these stars — not a threat.

Learn more about what this finding means.

Image credit: X-ray: NASA/CXC/Penn State Univ/K. Getman; Optical/IR: PanSTARRS; Image Processing: NASA/CXC/SAO/N. Wolk

Smoke Shrouds Northern Thailand

2026-04-23 04:01

A satellite image shows gray smoke obscuring most of the landscape around Chiang Mai except for small areas where mountain ridges are visible.
The MODIS (Moderate Resolution Imaging Spectroradiometer) on NASA’s Terra satellite captured this hazy view of the city and the surrounding region on April 22, 2026.
NASA Earth Observatory/Lauren Dauphin

Chiang Mai, Thailand’s second-largest city, lies within a network of narrow valleys in the country’s northern highlands. Though the historic city is known for panoramic views of the surrounding mountains, clear skies have become less common. In recent decades, smoke has increasingly darkened the skies during the dry season, particularly in March and April.

A NASA satellite captured this smoky view of the city and the surrounding region on April 22, 2026, when haze partially obscured valleys and ridges typically visible under clearer conditions. Most of the smoke likely comes from small agricultural and forest fires lit to burn off crop debris or maintain forest ecosystems. In 2026, satellite sensors detected small numbers of fires throughout January, but fire detections became more numerous and widespread in February, March, and April. Fire activity typically peaks in March and fades by May as seasonal rains increase. 

Research indicates that smoke from biomass burning is one of the largest contributors to poor air quality in northern Thailand during the dry season. By one estimate, about 70 percent of fine particulate matter (PM2.5) in Chiang Mai in April comes from biomass burning. Smaller contributors to the region’s hazy skies include vehicles, power plants and industry, and charcoal burning for cooking and heating. Geography also plays a key role; the surrounding mountains block air flow and encourage temperature inversions that trap both local pollution and haze from the broader region in the valleys.

On the same day the satellite image was captured, air quality sensors on the ground recorded “unhealthy” and “very unhealthy” levels of PM2.5 air pollution throughout Chiang Mai and the region, according to data from the World Air Quality Index project. Prolonged exposure to high levels of air pollution can contribute to respiratory and cardiovascular diseases and other health problems.

News reports suggest that the haze is affecting the tourism industry and has contributed to a decrease in the number of international travelers coming to Chiang Mai. After more than a month of persistent haze, the number of tourists arriving in the town of Pai, a popular destination for backpackers northwest of Chiang Mai, was down 90 percent, according to one local newspaper.

Unusually warm and dry conditions have gripped the region in recent weeks, according to meteorologists with the ASEAN Specialised Meteorological Centre (ASMC). On March 27, the group advised that there was a “high risk” of severe transboundary haze in the region and elevated its alert level to three, the highest on the scale. 

In late March, the group noted that dry conditions were forecast to persist over most parts of the Mekong sub-region, with prevailing winds expected to blow mostly from the south or southwest. “Under these conditions,” ASMC noted, “the hotspot and smoke haze situation could escalate further.”

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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New Timing for Stubble Burning in India

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Scientists say the seasonal crop fires are burning later in the day than in previous years.

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Dry-Season Floods Drench Northern Colombia

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Villages and farmland were swamped after unusually heavy early-February rains pushed the Sinú River over its banks.

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Fires on the Rise in the Far North

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Satellite-based maps show northern wildland fires becoming more frequent and widespread as temperatures rise and lightning reaches higher latitudes.

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NASA’s 777 Aircraft Returns Home with Science Flights on the Horizon

2026-04-22 20:29

3 Min Read

NASA’s 777 Aircraft Returns Home with Science Flights on the Horizon

The white 777 aircraft can be seen touching down on a long runway with a row of grass along the pavement at NASA's Langley Research Center.
After heavy structural modifications in Waco, Texas, NASA’s 777 aircraft returns to Langley Research Center in Hampton, Virginia.
Credits: NASA/Ryan Hill

NASA’s Boeing 777 has returned to the agency’s fleet after undergoing heavy structural modifications as it transforms from a giant passenger plane into the agency’s next-generation airborne science laboratory. After a check flight and a three-hour transit from Waco, the aircraft returned to NASA’s Langley Research Center in Hampton, Virginia, on April 22.

Since January 2025, the aircraft has been in Texas receiving hardware and structural upgrades to prepare for science operations. The modifications include installing dedicated research stations and extensive wiring. This allows payload systems to communicate with sensors such as lidar and infrared imaging spectrometers during flights. Cabin windows were enlarged and open portals installed at the bottom of the fuselage to mount remote-sensing instruments.

A white 777 aircraft is shown in a warehouse space with support scaffolding underneath it. A few windows along the fuselage have been cut out and replaced with larger windows to serve as instrument viewports.
Widened windows along the NASA 777 will serve as viewports for a variety of scientific instrument sensors. Modifications on the belly of the aircraft at the L3Harris facility in Waco require extensive support to ensure aircraft alignment during reassembly.
Credit: L3Harris

“Airborne missions at NASA use cutting-edge instruments to explore and understand our home planet,” said Derek Rutovic, program manager for the Airborne Science Program at NASA Headquarters in Washington. “The 777 will be the largest airborne research laboratory in our fleet, collecting data to improve life on our home planet and extend our knowledge of the Earth system as a whole.”

Acquired in 2022 to succeed NASA’s retired DC-8 aircraft, the 777 will expand the agency’s airborne research capacity. It can accommodate 50 to 100 operators and carry 75,000 pounds of equipment for flights lasting up to 18 hours.

“NASA’s DC-8 was an incredible workhorse for Earth science for nearly 40 years,” said Kirsten Boogaard, the NASA 777 program manager at NASA Langley and former deputy program manager of NASA’s DC-8. “Being part of that team, I got to see the impact up close. I’m excited for what the 777 will bring. It gives us the ability to bring together more partners, more educational opportunities, and more instruments. That will make a real difference in the data we collect moving forward.”

A view from inside the cabin of the 777 shows holes in the bottom of the fuselage where viewports have been cut. Workers are throughout the cabin, standing above and below the ports.
L3Harris installs viewports in the 777 aircraft cargo bay that will house advanced scientific instruments.
Credit: L3Harris

The aircraft’s inaugural science mission, slated to deploy in January 2027, will investigate high-impact winter weather events, such as severe cold air outbreaks, wind, snow and ice storms, and hazardous seas. Known as the North American Upstream Feature-Resolving and Tropopause Uncertainty Reconnaissance Experiment (NURTURE), the mission will collect detailed atmospheric observations across a vast region spanning North America, Europe, Greenland, and the Arctic and North Atlantic Oceans.

A worker
Temporary fasteners are utilized to map out hole patterns through four layers of reinforcement. Nearly 35,000 precision holes are drilled into the belly of the aircraft.
Credit: L3Harris

“We’ve been completing the engineering design and analysis to install the NURTURE payload into the aircraft in parallel with the portal modification,” Rutovic said. “We’re excited to get the airplane back home to NASA and on the road to its first mission.”

The NASA 777’s major structural modification was performed by L3Harris Technologies in partnership with Yulista Holding, LLC. Research station and wiring upgrades in the cabin are being performed by NASA and HII. NASA’s Airborne Science Program is responsible for providing aircraft systems that further science and advance the use of satellite data and is part of the Science Mission Directorate’s Earth Science Division.

To learn more about NASA’s airborne science missions, visit:

https://airbornescience.nasa.gov

NASA Targets Early September for Roman Space Telescope Launch

2026-04-22 17:46

The Roman observatory in a clean room
NASA’s Nancy Grace Roman Space Telescope is photographed in the largest clean room at the agency’s Goddard Space Flight Center in Greenbelt, Md. The observatory is on track for delivery to the launch site at NASA’s Kennedy Space Center in Florida in June and launch as soon as early September.
NASA/Scott Wiessinger

NASA’s Nancy Grace Roman Space Telescope team now is targeting as soon as early September 2026 for launch, ahead of the agency’s commitment to flight no later than May 2027.

“Roman’s accelerated development is a true success story of what we can achieve when public investment, institutional expertise, and private enterprise come together to take on the near-impossible missions that change the world,” said NASA Administrator Jared Isaacman, who announced the update at a news conference on April 21 at the agency’s Goddard Space Flight Center in Greenbelt, Maryland.

Roman will pair a large field of view with crisp infrared vision to survey deep, vast swaths of sky. While the mission was designed with dark energy, dark matter, and exoplanets in mind, Roman’s unprecedented observational capability will offer practically limitless opportunities for astronomers to explore all kinds of cosmic topics.

By the end of its five-year primary mission, Roman is expected to amass a 20,000-terabyte data archive. Scientists can draw on it to identify and study 100,000 exoplanets, hundreds of millions of galaxies, billions of stars, and rare objects and phenomena — including some that astronomers have never witnessed before.

Roman will launch on a SpaceX Falcon Heavy rocket from Launch Complex 39A at NASA’s Kennedy Space Center in Florida. NASA and SpaceX will share more information about a specific launch date, and the agency will continue to share updates concerning prelaunch preparations as new information becomes available.

The Nancy Grace Roman Space Telescope is managed at NASA’s Goddard Space Flight Center, with participation by NASA’s Jet Propulsion Laboratory and Caltech/IPAC in Southern California, the Space Telescope Science Institute (STScI) in Baltimore, and scientists from various research institutions.

To learn more about the Roman mission, visit:

https://nasa.gov/roman

Media contact:

Claire Andreoli
NASA’s Goddard Space Flight Center, Greenbelt, Md.
301-286-1940

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Last Updated
Apr 23, 2026
Editor
Ashley Balzer
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