Tuesday, 25 August 2026

NASA Sets Coverage for Roman Space Telescope Launch from Florida

NASA’s Nancy Grace Roman Space Telescope is encapsulated within the payload fairing at the agency’s Kennedy Space Center in Florida, ahead of mating to a SpaceX Falcon Heavy rocket for launch.
Credit: NASA/Sydney Rohde (Rocz)

Coverage plans are ready for NASA’s Nancy Grace Roman Space Telescope prelaunch and launch activities. Roman is NASA’s next-generation observatory designed to explore some of the universe’s biggest mysteries, including dark energy.

NASA and SpaceX are targeting Roman’s liftoff for no earlier than 7:26 a.m. EDT Sunday, Aug. 30, aboard a SpaceX Falcon Heavy rocket from Launch Complex 39A at the agency’s Kennedy Space Center in Florida. Launch coverage begins at 6:20 a.m.

Live coverage of these events will stream through a variety of platforms. Learn where to watch online:

https://www.nasa.gov/live

Named for NASA’s first chief astronomer, the Nancy Grace Roman Space Telescope will pair sharp infrared vision with a field of view at least 100 times larger than the agency’s Hubble Space Telescope. Its crisp, sweeping surveys will help scientists investigate dark energy and dark matter, discover and characterize exoplanets, map billions of galaxies, study black holes, and explore objects from our own solar system to the edge of the observable universe.

After launch and separation from the rocket, Roman will travel to the second Sun-Earth Lagrange point, or L2, about one million miles from Earth. The mission has a five-year primary lifetime with a goal of operating for 10 years, and Roman’s science data will be publicly available after processing.

NASA’s mission coverage is as follows (all times are Eastern and subject to change based on real-time operations):

Saturday, Aug. 29

9 a.m.: NASA’s Roman Space Telescope Mission Science Briefing: The briefing will take place in the NASA Kennedy Press Site auditorium with the following participants:

  • Shawn Domagal-Goldman, director, Astrophysics Division, NASA Headquarters
  • Julie McEnery, Roman telescope senior project scientist, NASA Goddard Space Flight Center
  • Vanessa Bailey, Roman Coronagraph Instrument scientist, NASA Jet Propulsion Laboratory
  • Kristen McQuinn, Roman Science Operations Center lead, Space Telescope Science Institute
  • Lee Armus, Roman Science Support Center lead, Caltech/IPAC

Media may ask questions in person or by phone. Limited auditorium space will be available for in-person participation. For the dial-in number and passcode, media should contact the NASA Kennedy newsroom no later than one hour before the briefing at: ksc-newsroom@mail.nasa.gov.

10:30 a.m.: NASA’s Roman Space Telescope Prelaunch News Conference: The news conference will take place in the NASA Kennedy Press Site auditorium with the following participants:

  • Nicky Fox, associate administrator, Science Mission Directorate, NASA Headquarters
  • Lucas Paganini, Roman telescope program executive, NASA Headquarters
  • Jackie Townsend, Roman telescope project manager, NASA Goddard
  • Denton Gibson, launch director, NASA’s Launch Services Program, NASA Kennedy
  • Julianna Scheiman, director, NASA Science and Dragon Programs, SpaceX
  • Justin McReynolds, launch weather officer, 45th Weather Squadron, U.S. Space Force

Media may ask questions in person or by phone. Limited auditorium space will be available for in-person participation. For the dial-in number and passcode, media should contact the NASA Kennedy newsroom no later than one hour before the briefing at: ksc-newsroom@mail.nasa.gov.

11:45 a.m.: NASA Administrator Jared Isaacman is expected to fly past the Nancy Grace Roman Space Telescope and Falcon Heavy rocket on the launchpad in his jet. The flyby will be shown live on the same stream as the prelaunch news conference, with a view of the launch pad during the transition. The flyby is subject to weather and operational considerations.

12 p.m.: In-person interviews will take place in the NASA Kennedy Press News Center:

  • Nicky Fox, associate administrator, Science Mission Directorate, NASA Headquarters
  • Lucas Paganini, Roman telescope program executive, NASA Headquarters
  • Dalia Kirschbaum, acting director, Sciences and Exploration Directorate, NASA Goddard
  • Josh Schlieder, Roman telescope project scientist, NASA Goddard
  • Jason Hylan, Roman telescope flight segment and observatory manager, NASA Goddard
  • Bertrand Mennesson, Roman Coronagraph Instrument project scientist, NASA JPL
  • Jeff Hanke, president, Space Systems, Space and Mission Systems, L3Harris Technologies 
  • Wendy Minotti, program manager, Exquisite Imaging, Space and Mission Systems, L3Harris Technologies
  • Bonnie Patterson, vice president and general manager, Civil Space, Space and Mission Systems, BAE Systems
  • Sarah Lipscy, director, Strategic Operations, Space and Mission Systems, BAE Systems

Previously credentialed media interested in scheduling an interview should contact the NASA Kennedy newsroom at: ksc-newsroom@mail.nasa.gov.

Sunday, Aug. 30

6:20 a.m.: Launch coverage begins.

7:26 a.m.: Launch

9:30 a.m.: Postlaunch news conference with the following participants:

  • NASA Administrator Jared Isaacman
  • Nicky Fox, associate administrator, Science Mission Directorate, NASA Headquarters
  • Jackie Townsend, Roman telescope project manager, NASA Goddard
  • Julie McEnery, Roman telescope senior project scientist, NASA Goddard
  • Denton Gibson, launch director, NASA’s Launch Services Program, NASA Kennedy

Media may ask questions in person or by phone. Limited auditorium space will be available for in-person participation. For the dial-in number and passcode, media should contact the NASA Kennedy newsroom no later than one hour before the news conference at: ksc-newsroom@mail.nasa.gov.


Audio-only coverage

Audio-only coverage of the launch will be carried on the NASA “V” circuits, accessible by dialing 321-867-1220 or 321-867-1240. On launch day, mission audio countdown activities without NASA broadcast commentary will be carried on 321-867-7135.

Launch audio also will be available on Launch Information Service and Amateur Television System’s VHF radio frequency 146.940 MHz and KSC Amateur Radio Club’s UHF radio frequency 444.925 MHz, FM mode, heard within Brevard County on the Space Coast.

NASA website launch coverage

Launch day coverage will be available on the NASA website, including the livestream and blog updates as countdown milestones occur. On-demand streaming video and launch photos will be available shortly after liftoff. Follow mission updates on the Roman launch blog.

Attend launch virtually

Members of the public may register to attend the Roman launch virtually. NASA’s Virtual Guest Program includes curated launch resources, notifications about related opportunities or schedule changes, and a stamp for the NASA virtual guest passport following launch.

Watch, engage on social media

Let people know you’re watching the mission on X, Facebook, and Instagram by following and tagging these accounts:


The Roman telescope is managed at NASA Goddard with participation by the agency’s Jet Propulsion Laboratory in Southern California; Caltech/IPAC in Pasadena, California; the Space Telescope Science Institute in Baltimore; and a team of scientists from various research institutions. The primary industrial partners are BAE Systems Inc., L3Harris Technologies, and Teledyne Scientific & Imaging. Contributions to Roman also are made by ESA (European Space Agency), JAXA (Japan Aerospace Exploration Agency), the French space agency CNES (Centre National d’Études Spatiales), and the Max Planck Institute for Astronomy in Germany. NASA’s Launch Services Program, based at Kennedy, manages the launch service for the Roman mission.

For more information about NASA’s Roman telescope, visit:

https://www.nasa.gov/roman

-end-

Alise Fisher
NASA Headquarters, Washington
202-385-1287
alise.m.fisher@nasa.gov

Leejay Lockhart
Kennedy Space Center, Fla.
321-747-8310
leejay.lockhart@nasa.gov

Claire Andreoli
Goddard Space Flight Center, Greenbelt, Md.
301-286-1940
claire.andreoli@nasa.gov



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APOD: 2026 August 24 – Comet 220P in Outburst

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.

Comet 220P with green coma and white dust tail.

Comet 220P in Outburst

Explanation: Comet 220P is unexpectedly bright. Normally, periodic Comet 220P/McNaught is so dim that to see it requires a telescope. Two surprising outbursts this year, however, have made it about 20,000 times brighter than usual, so that it is now visible with binoculars and long-duration camera exposures. As expected, Comet 220P continues to orbit the Sun between Mars and Jupiter with a period of over 5 years. The featured long duration exposure, taken 10 days ago from South Africa, shows the comet‘s bright green head and short dust tail. Reasons for Comet 220P’s impressive outbursts are unknown but could be caused by the release of built-up subsurface gas or comet quakes. Comet 220P will pass about one Earth-Sun distance from the Earth in October, after which it is expected to fade quickly as it begins its return to the far part of its orbit.

Tomorrow’s picture: Moon dark

Date August 24, 2026
Credit & Copyright: Spilios Asimakopoulos
Authors & editors: Robert Nemiroff, Jerry Bonnell, Cecilia Chirenti, Keighley Rockcliffe
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.

Random APOD Generator



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Starstruck: NASA Research Shows How Sun’s Ancient History Shaped Earth

6 Min Read

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.  

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

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Monday, 24 August 2026

NASA Astronaut Reid Wiseman at Freedom 250 Grand Prix

NASA astronaut Reid Wiseman looks up at another person speaking. He is sitting in the second seat of a racecar. He's wearing a white helmet with his last name on the visor.
NASA/Joel Kowsky

NASA astronaut and Artemis II commander Reid Wiseman is seen in the two-seat IndyCar as he prepares for driver Conor Daly to take him on a lap ahead of the start of the Freedom 250 Grand Prix, Sunday, Aug. 23, 2026, in Washington, D.C.

Image credit: NASA/Joel Kowsky



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Mapping Air Pollution With MAIA Sensors in Addis Ababa

2 Min Read

Mapping Air Pollution With MAIA Sensors in Addis Ababa

A geographic map of Addis Ababa displays localized PM2.5 pollution levels, using a color bar ranging from yellow to red highlighting air quality variations from 20 to 40 micrograms per cubic meter across 10 monitoring stations.
PIA26694
Credits:
NASA/JPL-Caltech

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Mapping Air Pollution With MAIA Sensors in Addis Ababa

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Description

This map of Addis Ababa, the capital of Ethiopia, shows the locations of 10 air sensors that NASA’s Multi-Angle Imager for Aerosols (MAIA) mission is using to provide one of the most detailed looks ever at the city’s air pollution. Over the course of three years, these sensors measured particulate matter that is 2.5 micrometers or less in diameter, also known as PM2.5. Black carbon, or soot, is an important component of particulate pollution in Addis Ababa, which studies have linked to impacts on low birth weight, brain development, respiratory conditions, and premature mortality.

The color bar at right indicates air quality variations from 20 to 40 micrograms per cubic meter across the monitoring stations, with the darkest red being the poorest air quality.

In Ethiopia, black carbon is commonly produced by diesel vehicles, fires, and other combustion sources. Detailed measurements from the MAIA sensors reveal how Addis Ababa’s air pollution changes by time of day and season, including spikes produced by rush-hour traffic and holiday celebrations. The findings are relevant to cities around the world, including in the United States.

MAIA’s air pollution research is focused on a dozen regions around the globe, including three in the U.S. centered on Los Angeles, Atlanta, and Boston. The mission consists of a ground-based sensor network already in operation as well as a space observatory, which uses a camera built at NASA’s Jet Propulsion Laboratory, that will be launched by the Italian Space Agency (ASI) on an ASI satellite no earlier than late 2027. The camera is specially designed to help identify different types of PM2.5 aerosols based on how they reflect light, making it possible to map particle concentrations over each region that the mission studies.



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What Lake Bonneville Left Behind

Tan and white plains surround a dark mountainous ridge in a three-dimensional image of the Silver Island Mountains.
The rugged terrain of the Silver Island Mountains and Crater Island rises above the pale playa and bright salt flats of former Lake Bonneville. The image was acquired with the OLI (Operational Land Imager) on Landsat 8 on June 4, 2026, and overlaid on a digital elevation model.
NASA Earth Observatory/Michala Garrison

At its peak, ancient Lake Bonneville would have been a sight to behold. Nearly as large as Lake Michigan, the Ice Age lake spread across much of western Utah and parts of Nevada and Idaho. When it eventually receded, it left behind flat, bright playas and salt flats rich with minerals—a landscape that would later serve as the setting for feats of engineering and technological ingenuity, as well as epic tales of exploration and desperation.

Lake Bonneville began forming about 55,000 years ago during a cool, wet period, when volcanic eruptions in what’s now southeastern Idaho diverted the Bear River, causing water to gather in Gem Valley and other basins to the south. For tens of thousands of years, a natural dam at Red Rock Pass helped confine the lake.

Then, about 18,000 years ago, water breached that dam, unleashing a torrent that entered the Columbia River system. Over a six-week period, amid one of North America’s largest floods, lake levels plummeted by more than 350 feet (105 meters). As the climate warmed and dried in subsequent millennia, the lake shrank dramatically, leaving remnants that include today’s Great Salt Lake, Utah Lake, and Sevier Lake.

Lake Bonneville may be gone, but its imprint on the region’s landscape remains—even in satellite imagery. In this image (below) captured by the OLI (Operational Land Imager) on the NASA-USGS Landsat 8 satellite, bathtub-like rings and wave-cut terraces trace the position of former shorelines. The dried lakebed—where fine-grained clay, marl, and sandy sediment settled out of the water—appears pale in comparison to the darker, rockier, more vegetated surroundings.

A nadir view shows Crater Island—a dark, linear mountain ridge in the center of the image—flanked by flat tan and white landscapes.
NASA scientists analyzed the terrain in this part of Utah when testing technologies that will be used on NASA’s DAVINCI mission to Venus. This image was acquired with the OLI (Operational Land Imager) on Landsat 8 on June 4, 2026.
NASA Earth Observatory/Michala Garrison

In deep parts of the basin, where runoff and groundwater still pool, bright deposits of evaporite minerals coat the land surfaces, forming salt flats. These remarkably flat surfaces are the product of water gradually evaporating and concentrating minerals to produce brines and hard mineral crusts, typically including halite and gypsum, along with potassium- and magnesium-bearing salts. Brines and deposits like these—particularly of potash, which is used as a fertilizer—have long made the playa a target for mining, as seen in the rectangular evaporation ponds above and below.

In contrast, the darker, more rugged terrain—including the Silver Island Mountains, the Newfoundland Mountains, and the Pilot Range—that rises above the playas is built from layers of erosion-resistant sedimentary and metasedimentary bedrock that is hundreds of millions of years old. These mountains also contain younger igneous and metamorphic rocks that formed when magma intruded into the ancient sedimentary sequence.

Crater Island, for instance, is composed of sedimentary rocks, including silica-rich sandstones and quartzites that formed as sands accumulated in a shallow ocean, as well as intrusions of quartz monzonite, granites, and other igneous rocks. Periods of crustal stretching later produced the fault-block mountains that define the landscape.

Grayscale aerial image of rugged desert terrain showing branching channels, ridges, and broad textured plains with contrasting light and dark tones.
This animation shows the descent over Crater Island, Utah, of the camera system that will one day fly aboard NASA’s DAVINCI mission to Venus. It was created by stitching together 37 infrared images captured during a test on June 24, 2026.
Malin Space Science Systems/NASA/Jay Friedlander

Mapping geological distinctions like this took center stage in June 2026 when NASA scientists and engineers working with the agency’s DAVINCI mission came to Crater Island—a place they call “Venus on Earth”—to field-test the design of a set of cameras and a package of instruments that will eventually descend through the thick atmosphere of Venus and photograph mountains at scales finer than these Landsat images. During a 60-minute descent, the pioneering probe will capture near-infrared images, measure the atmospheric chemistry, and explore the environment of a world in unprecedented detail.

During the rehearsals at Crater Island, the camera system took hundreds of images of various rock formations, including iron-rich and silica-rich rock units, while suspended from a helicopter as it descended toward the surface. Using only the images acquired by DAVINCI’s camera systems, the team made three-dimensional maps of the area consistent with existing geologic maps, giving the scientists confidence that they will be able to map the geology of an analogous mountainous region on Venus that DAVINCI will study, an area called Alpha Regio.

Other epic adventures have played out on and around Lake Bonneville’s playas, as well. The flat, smooth surfaces have often been the setting for new land speed records. In 1960, Mickey Thompson became the first American to break the 400-miles-per-hour (640 kilometers-per-hour) barrier, hitting 406.60 miles per hour (654.36 kilometers per hour) in a streamlined race car on the Bonneville Salt Flats. The feat temporarily earned him the nickname “fastest man on Earth.”

Straight roads, colorful evaporation ponds, and a long racetrack are visible on bright white salt flats in a satellite image centered east of Wendover.
People mine minerals from the Bonneville Salt Flats and use its flat surface to pursue land speed records. This image was acquired with the OLI (Operational Land Imager) on Landsat 8 on June 4, 2026.
NASA Earth Observatory/Michala Garrison

More recently, in August 2026, Andy Green, the first person to break the sound barrier on land, set a record for the fastest land speed in a hydrogen-fueled internal-combustion vehicle, reaching 406.320 miles per hour (653.909 kilometers per hour). By burning hydrogen rather than gasoline, the “rocket car” produced no carbon dioxide.

Nearly two centuries earlier, in August 1846, members of the ill-fated Donner-Reed Party also passed along the southern edge of Crater Island. As part of a shortcut toward Pilot Peak, they journeyed from Hastings Pass, past Floating Island, and toward Donner Spring. However, in an ominous sign of challenges to come, their heavy wagons broke through the thin salt crust and became mired in underlying mud, slowing them down and prompting them to abandon several wagons in the desert.

NASA Earth Observatory images by Michala Garrison, using Landsat data from the U.S. Geological Survey. Story by Adam Voiland.

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A nadir view shows Crater Island—a dark, linear mountain ridge in the center of the image—flanked by flat tan and white landscapes.

June 4, 2026

JPEG (14.24 MB)

Tan and white plains surround a dark mountainous ridge in a three-dimensional image of the Silver Island Mountains.

June 4, 2026: Oblique map

JPEG (2.87 MB)

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NASA Sets Coverage for Roman Space Telescope Launch from Florida

NASA’s Nancy Grace Roman Space Telescope is encapsulated within the payload fairing at the agency’s Kennedy Space Center in Florida, ahead o...