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By NASA
5 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
The NASA History Office brings you the new Spring 2025 issue of NASA History News & Notes reflecting on some of the transitional periods in NASA’s history, as well as the legacies of past programs. Topics include NASA’s 1967 class of astronauts, historic experiments in airborne astronomy, NASA’s aircraft consolidation efforts in the 1990s, lightning observations from space, the founding of the NACA, the DC-8 airborne science laboratory, and more!
Volume 42, Number 1
Spring 2025
Featured Articles
From the Chief Historian
By Brian Odom
In the first few months of 2025, NASA will celebrate several significant anniversaries, including the 110th anniversary of the National Advisory Committee for Aeronautics (NACA) (March 3), the 55th anniversary of the launch of Apollo 13 (April 11), and the 35th anniversary of the launch of the Hubble Space Telescope (April 24). Celebrating these important milestones is a way for us as an agency and for the public to reflect upon where we have been and what we have accomplished and to think about what we might accomplish next. Continue Reading
The XS-11 and the Transition Away from Mandatory Jet Pilot Training for NASA Astronauts
By Jennifer Ross-Nazzal
Flying in space has been associated with pilots ever since 1959, when NASA announced its first class of astronauts, known as the Mercury 7. Part of being a professional astronaut meant you were a certified jet pilot. Even the scientist-astronauts, so named to differentiate them from the astronauts assigned to the Mercury and Gemini missions, selected in 1965 and in 1967, received pilot training. Until NASA better understood the impact of weightlessness on the human body, Robert R. Gilruth, head of the Manned Spacecraft Center (MSC) in Houston, believed all astronauts should meet this qualification. But when five scientist-astronauts from the 1967 class had a rocky transition, leading them to resign—due to their disinterest in flying at the cost of their scientific training and no spaceflight opportunities—it eventually led NASA to rethink their idea of having all astronauts become jet pilots. Continue Reading
Portrait of NASA’s 1967 group of astronauts. Seated at the table, left to right, are Philip K. Chapman, Robert A. R. Parker, William E. Thornton, and John A. Llewellyn. Standing, left to right, are Joseph P. Allen IV, Karl G. Henize, Anthony W. England, Donald L. Holmquest, Story Musgrave, William B. Lenoir, and Brian T. O’Leary.NASA The High-Flying Legacy of Airborne Observation: How Experimental Aircraft Contributed to Astronomy at NASA
By Lois Rosson
In June 2011, the Stratospheric Observatory for Infrared Astronomy (SOFIA) chased down Pluto’s occultation of a far-away star. … SOFIA’s 2011 observation of Pluto followed up on a historic 1988 observation made by the airborne Kuiper Airborne Observatory (KAO) that proved that Pluto had an atmosphere at all. The technical versatility of both flights, conducted from aircraft hurtling stabilized telescopes through the air, speaks to the legacy of airborne astronomical observation at NASA. But how did this idiosyncratic format emerge in the first place? Airborne astronomy, in which astronomical observations are made from a moving aircraft, was attempted almost as soon as airplanes themselves were developed. Continue Reading
NASA’s Tortuous Effort to Consolidate its Aircraft
By Robert Arrighi
Thirty years ago, on January 6, 1995, NASA Administrator Dan Goldin announced, “We’ve started a revolution at NASA. It’s real. We have a road map for change. We’ve already begun.” Thus began one of the agency’s most daunting endeavors, a top-to-bottom reassessment of NASA’s processes, programmatic assignments, and staffing levels. One of the most controversial aspects of this effort was the proposal to transfer nearly all of the agency’s research aircraft to Dryden Flight Research Center (today known as Armstrong). Continue Reading
Three ER-2 Aircraft in formation over Golden Gate Bridge, San Francisco, CA on their final flight out of NASA Ames Research Center before redeployment to NASA’s Dryden Flight Research Center, now known as NASA Armstrong.NASA/Eric James The Space Between: Mesoscale Lightning Observations and Weather Forecasting, 1965–82
By Brad Massey
Skylab astronaut Edward G. Gibson looked down at Earth often during his 84 days on NASA’s first space station. From his orbital vantage point, Gibson took in the breathtaking views of our planet’s diverse landscapes. He also noted the interesting behavior of the planet’s most powerful electrical force: lightning. … Gibson’s words were of great interest to the lightning researchers affiliated with NASA’s Severe Storms and Local Research Program and others who believed observing Earth’s lightning from low Earth orbit generated valuable data that meteorologists could use to better forecast dangerous storm characteristics and behavior. With these motivations in mind, researchers created new Earth- and space-based experiments from the mid-1960s to the first Space Shuttle missions in the early 1980s that observed lightning on a regional level. Continue Reading
Adding Color to the Moon: Jack Kinzler’s Oral History Interviews
By Sandra Johnson
Manned Spacecraft Center (MSC) Director Robert R. Gilruth placed a call to Jack Kinzler less than four months before the Apollo 11 launch. Gilruth asked him to attend a meeting with a high-level group of individuals from both MSC and NASA Headquarters to discuss ideas for celebrating the first lunar landing. Kinzler, in his capacity as the chief of the Technical Services Division, arrived ready to present his suggestions for commemorating the achievement. Continue Reading
Apollo 11 astronaut Edwin E. “Buzz” Aldrin Jr. poses for a photograph beside the deployed United States flag during the mission’s extravehicular activity (EVA) on the lunar surface.NASA The Founding of the NACA
By James Anderson
One hundred ten years ago this month, NASA’s predecessor organization, the National Advisory Committee for Aeronautics (NACA), was founded. The date of the anniversary marks the passage of a rider to a naval appropriations bill that established the NACA for the modest sum of $5,000 annually. Telling the story of the NACA’s founding in this manner—using March 3, 1915, as the moment in time to represent the NACA’s beginning—is true, but it overlooks two crucial aspects of the founding. The founding was both a culmination and a turning point for science and aeronautics in the United States. Continue Reading
Remembering the DC-8 Airborne Science Laboratory at NASA
By Bradley Lynn Coleman
The NASA History Office and NASA Earth Science Division cohosted a workshop on the recently retired NASA DC-8 Airborne Science Laboratory (1986–2024) at the Mary W. Jackson NASA Headquarters Building in Washington, DC, October 24 and 25, 2024. The workshop celebrated the history of the legendary aircraft; documented DC-8–enabled scientific, engineering, education, and outreach activities; and captured lessons of the past for future operators. Continue Reading
The DC-8 in flight near Lone Pine, California. NASA/Jim Ross Download the Spring 2025 Edition More Issues of NASA History News and Notes Share
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By NASA
Hubble Space Telescope Hubble Home Overview About Hubble The History of Hubble Hubble Timeline Why Have a Telescope in Space? Hubble by the Numbers At the Museum FAQs Impact & Benefits Hubble’s Impact & Benefits Science Impacts Cultural Impact Technology Benefits Impact on Human Spaceflight Astro Community Impacts Science Hubble Science Science Themes Science Highlights Science Behind Discoveries Hubble’s Partners in Science Universe Uncovered Explore the Night Sky Observatory Hubble Observatory Hubble Design Mission Operations Missions to Hubble Hubble vs Webb Team Hubble Team Career Aspirations Hubble Astronauts News Hubble News Hubble News Archive Social Media Media Resources Multimedia Multimedia Images Videos Sonifications Podcasts e-Books Online Activities Lithographs Fact Sheets Glossary Posters Hubble on the NASA App More 35th Anniversary 6 Min Read NASA’s Hubble Traces Hidden History of Andromeda Galaxy
This photomosaic of the Andromeda galaxy is the largest ever assembled from Hubble observations. Credits:
NASA, ESA, Benjamin F. Williams (UWashington), Zhuo Chen (UWashington), L. Clifton Johnson (Northwestern); Image Processing: Joseph DePasquale (STScI) In the years following the launch of NASA’s Hubble Space Telescope, astronomers have tallied over 1 trillion galaxies in the universe. But only one galaxy stands out as the most important nearby stellar island to our Milky Way — the magnificent Andromeda galaxy (Messier 31). It can be seen with the naked eye on a very clear autumn night as a faint cigar-shaped object roughly the apparent angular diameter of our Moon.
A century ago, Edwin Hubble first established that this so-called “spiral nebula” was actually very far outside our own Milky Way galaxy — at a distance of approximately 2.5 million light-years or roughly 25 Milky Way diameters. Prior to that, astronomers had long thought that the Milky way encompassed the entire universe. Overnight, Hubble’s discovery turned cosmology upside down by unveiling an infinitely grander universe.
Now, a century later, the space telescope named for Hubble has accomplished the most comprehensive survey of this enticing empire of stars. The Hubble telescope is yielding new clues to the evolutionary history of Andromeda, and it looks markedly different from the Milky Way’s history.
This is largest photomosaic ever assembled from Hubble Space Telescope observations. It is a panoramic view of the neighboring Andromeda galaxy, located 2.5 million light-years away. It took over 10 years to make this vast and colorful portrait of the galaxy, requiring over 600 Hubble overlapping snapshots that were challenging to stitch together. The galaxy is so close to us, that in angular size it is six times the apparent diameter of the full Moon, and can be seen with the unaided eye. For Hubble’s pinpoint view, that’s a lot of celestial real estate to cover. This stunning, colorful mosaic captures the glow of 200 million stars. That’s still a fraction of Andromeda’s population. And the stars are spread across about 2.5 billion pixels. The detailed look at the resolved stars will help astronomers piece together the galaxy’s past history that includes mergers with smaller satellite galaxies. NASA, ESA, Benjamin F. Williams (UWashington), Zhuo Chen (UWashington), L. Clifton Johnson (Northwestern); Image Processing: Joseph DePasquale (STScI)
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Without Andromeda as a proxy for spiral galaxies in the universe at large, astronomers would know much less about the structure and evolution of our own Milky Way. That’s because we are embedded inside the Milky Way. This is like trying to understand the layout of New York City by standing in the middle of Central Park.
“With Hubble we can get into enormous detail about what’s happening on a holistic scale across the entire disk of the galaxy. You can’t do that with any other large galaxy,” said principal investigator Ben Williams of the University of Washington. Hubble’s sharp imaging capabilities can resolve more than 200 million stars in the Andromeda galaxy, detecting only stars brighter than our Sun. They look like grains of sand across the beach. But that’s just the tip of the iceberg. Andromeda’s total population is estimated to be 1 trillion stars, with many less massive stars falling below Hubble’s sensitivity limit.
Photographing Andromeda was a herculean task because the galaxy is a much bigger target on the sky than the galaxies Hubble routinely observes, which are often billions of light-years away. The full mosaic was carried out under two Hubble programs. In total, it required over 1,000 Hubble orbits, spanning more than a decade.
This panorama started with the Panchromatic Hubble Andromeda Treasury (PHAT) program about a decade ago. Images were obtained at near-ultraviolet, visible, and near-infrared wavelengths using the Advanced Camera for Surveys and the Wide Field Camera 3 aboard Hubble to photograph the northern half of Andromeda.
This is the largest photomosaic ever made by the Hubble Space Telescope. The target is the vast Andromeda galaxy that is only 2.5 million light-years from Earth, making it the nearest galaxy to our own Milky Way. Andromeda is seen almost edge-on, tilted by 77 degrees relative to Earth’s view. The galaxy is so large that the mosaic is assembled from approximately 600 separate overlapping fields of view taken over 10 years of Hubble observing — a challenge to stitch together over such a large area. The mosaic image is made up of at least 2.5 billion pixels. Hubble resolves an estimated 200 million stars that are hotter than our Sun, but still a fraction of the galaxy’s total estimated stellar population. Interesting regions include: (a) Clusters of bright blue stars embedded within the galaxy, background galaxies seen much farther away, and photo-bombing by a couple bright foreground stars that are actually inside our Milky Way; (b) NGC 206 the most conspicuous star cloud in Andromeda; (c) A young cluster of blue newborn stars; (d) The satellite galaxy M32, that may be the residual core of a galaxy that once collided with Andromeda; (e) Dark dust lanes across myriad stars.
NASA, ESA, Benjamin F. Williams (UWashington), Zhuo Chen (UWashington), L. Clifton Johnson (Northwestern); Image Processing: Joseph DePasquale (STScI)
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This program was followed up by the Panchromatic Hubble Andromeda Southern Treasury (PHAST), recently published in The Astrophysical Journal and led by Zhuo Chen at the University of Washington, which added images of approximately 100 million stars in the southern half of Andromeda. This region is structurally unique and more sensitive to the galaxy’s merger history than the northern disk mapped by the PHAT survey.
The combined programs collectively cover the entire disk of Andromeda, which is seen almost edge-on — tilted by 77 degrees relative to Earth’s view. The galaxy is so large that the mosaic is assembled from approximately 600 separate fields of view. The mosaic image is made up of at least 2.5 billion pixels.
The complementary Hubble survey programs provide information about the age, heavy-element abundance, and stellar masses inside Andromeda. This will allow astronomers to distinguish between competing scenarios where Andromeda merged with one or more galaxies. Hubble’s detailed measurements constrain models of Andromeda’s merger history and disk evolution.
A Galactic ‘Train Wreck’
Though the Milky Way and Andromeda formed presumably around the same time many billions of years ago, observational evidence shows that they have very different evolutionary histories, despite growing up in the same cosmological neighborhood. Andromeda seems to be more highly populated with younger stars and unusual features like coherent streams of stars, say researchers. This implies it has a more active recent star-formation and interaction history than the Milky Way.
“Andromeda’s a train wreck. It looks like it has been through some kind of event that caused it to form a lot of stars and then just shut down,” said Daniel Weisz at the University of California, Berkeley. “This was probably due to a collision with another galaxy in the neighborhood.”
A possible culprit is the compact satellite galaxy Messier 32, which resembles the stripped-down core of a once-spiral galaxy that may have interacted with Andromeda in the past. Computer simulations suggest that when a close encounter with another galaxy uses up all the available interstellar gas, star formation subsides.
The Andromeda Galaxy, our closest galactic neighbor, holds over 1 trillion stars and has been a key to unlocking the secrets of the universe. Thanks to NASA’s Hubble Space Telescope, we’re now seeing Andromeda in stunning new detail, revealing its dynamic history and unique structure.
Credit: NASA’s Goddard Space Flight Center; Lead Producer: Paul Morris
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“Andromeda looks like a transitional type of galaxy that’s between a star-forming spiral and a sort of elliptical galaxy dominated by aging red stars,” said Weisz. “We can tell it’s got this big central bulge of older stars and a star-forming disk that’s not as active as you might expect given the galaxy’s mass.”
“This detailed look at the resolved stars will help us to piece together the galaxy’s past merger and interaction history,” added Williams.
Hubble’s new findings will support future observations by NASA’s James Webb Space Telescope and the upcoming Nancy Grace Roman Space Telescope. Essentially a wide-angle version of Hubble (with the same sized mirror), Roman will capture the equivalent of at least 100 high-resolution Hubble images in a single exposure. These observations will complement and extend Hubble’s huge dataset.
The Hubble Space Telescope has been operating for over three decades and continues to make ground-breaking discoveries that shape our fundamental understanding of the universe. Hubble is a project of international cooperation between NASA and ESA (European Space Agency). NASA’s Goddard Space Flight Center in Greenbelt, Maryland, manages the telescope and mission operations. Lockheed Martin Space, based in Denver, also supports mission operations at Goddard. The Space Telescope Science Institute in Baltimore, which is operated by the Association of Universities for Research in Astronomy, conducts Hubble science operations for NASA.
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Explore the Night Sky: Messier 31
Hubble’s High-Definition Panoramic View of the Andromeda Galaxy
NASA’s Hubble Finds Giant Halo Around the Andromeda Galaxy
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Claire Andreoli (claire.andreoli@nasa.gov)
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Ray Villard
Space Telescope Science Institute, Baltimore, MD
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Last Updated Jan 16, 2025 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Related Terms
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By European Space Agency
The largest photomosaic of the Andromeda galaxy, assembled from NASA/ESA Hubble Space Telescope observations, unveils hundreds of millions of stars. It took more than 10 years to collect data for this colorful portrait of our neighbouring galaxy and was created from more than 600 snapshots. This stunning, colourful mosaic captures the glow of 200 million stars, and is spread across roughly 2.5 billion pixels.
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By NASA
2 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
2025 Seminar Series
Throughout 2025, the NASA History Office is presenting a seminar series on the topic of Aerospace Latin America. This series will explore the origins, evolution, and historical context of aerospace in the region since the dawn of the Space Age, touching on a broad range of topics including aerospace infrastructure development, space policy and law, Earth science applications, and much more.
This seminar series is part of a collaborative effort to gather insights and research that will conclude in an anthology of essays to be published as a NASA History Special Publication. Individual presentations will be held virtually bi-weekly or monthly.
During a gravity assist in 1992, the Galileo spacecraft took images of Earth and the Moon. Separate images were combined to generate this composite which features a view of the Pacific Ocean and Central and South America.NASA/JPL/USGS Upcoming Presentations
“Governing the Moon: A History”
Stephen Buono (University of Chicago)
Thursday, February 6 at 1pm CST
In this talk, Stephen Buono will provide a nuanced history of the unratified Agreement Governing the Activities of States on the Moon and Other Celestial Bodies, more commonly known as the Moon Treaty. Buono will illuminate the treaty’s deep origins, the contributions of international space lawyers, the details of the negotiating process, the role played by the United States in shaping the final text, and the contributions of the treaty’s single most important author, Argentine lawyer, Aldo Armando Cocca.
“A God’s Eye View: Aviators and the Re-Conquest of Latin America”
Pete Soland(University of Houston—Downtown)
Thursday, February 20 at 1pm CST
This talk scrutinizes the aviator-conquistador metaphor. It examines airplane pilots as personifying high modernism and the technological sublime in Latin America from the turn of the century through the early Space Age, when spaceships and astronauts eclipsed airplanes and aviators. Repeated invocations of the conquistador as a metaphor for the aviator’s social role–and the conquest as an analogy for the goals of aviation programs–illustrate how elites promoted their modernization initiatives to national publics.
How to Attend
These presentations will be held via Microsoft Teams. For details on how to attend the meetings, join the NASA History mailing list to receive updates. Just send a blank email to history-join@lists.hq.nasa.gov to join. Alternatively, send us an email to receive a link for the next meeting.
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By NASA
5 Min Read NASA’s Parker Solar Probe Makes History With Closest Pass to Sun
An artist’s concept showing Parker Solar Probe. Credits:
NASA/APL Operations teams have confirmed NASA’s mission to “touch” the Sun survived its record-breaking closest approach to the solar surface on Dec. 24, 2024.
Breaking its previous record by flying just 3.8 million miles above the surface of the Sun, NASA’s Parker Solar Probe hurtled through the solar atmosphere at a blazing 430,000 miles per hour — faster than any human-made object has ever moved. A beacon tone received late on Dec. 26 confirmed the spacecraft had made it through the encounter safely and is operating normally.
This pass, the first of more to come at this distance, allows the spacecraft to conduct unrivaled scientific measurements with the potential to change our understanding of the Sun.
Flying this close to the Sun is a historic moment in humanity’s first mission to a star.
Nicky fox
NASA Associate Administrator, Science Mission Directorate
“Flying this close to the Sun is a historic moment in humanity’s first mission to a star,” said Nicky Fox, who leads the Science Mission Directorate at NASA Headquarters in Washington. “By studying the Sun up close, we can better understand its impacts throughout our solar system, including on the technology we use daily on Earth and in space, as well as learn about the workings of stars across the universe to aid in our search for habitable worlds beyond our home planet.”
NASA’s Parker Solar Probe survived its record-breaking closest approach to the solar surface on Dec. 24, 2024. Breaking its previous record by flying just 3.8 million miles above the surface of the Sun, the spacecraft hurtled through the solar atmosphere at a blazing 430,000 miles per hour — faster than any human-made object has ever moved.
Credits: NASA This video can be freely shared and downloaded at https://svs.gsfc.nasa.gov/14741.
Parker Solar Probe has spent the last six years setting up for this moment. Launched in 2018, the spacecraft used seven flybys of Venus to gravitationally direct it ever closer to the Sun. With its last Venus flyby on Nov. 6, 2024, the spacecraft reached its optimal orbit. This oval-shaped orbit brings the spacecraft an ideal distance from the Sun every three months — close enough to study our Sun’s mysterious processes but not too close to become overwhelmed by the Sun’s heat and damaging radiation. The spacecraft will remain in this orbit for the remainder of its primary mission.
“Parker Solar Probe is braving one of the most extreme environments in space and exceeding all expectations,” said Nour Rawafi, the project scientist for Parker Solar Probe at the Johns Hopkins Applied Physics Laboratory (APL), which designed, built, and operates the spacecraft from its campus in Laurel, Maryland. “This mission is ushering a new golden era of space exploration, bringing us closer than ever to unlocking the Sun’s deepest and most enduring mysteries.”
Close to the Sun, the spacecraft relies on a carbon foam shield to protect it from the extreme heat in the upper solar atmosphere called the corona, which can exceed 1 million degrees Fahrenheit. The shield was designed to reach temperatures of 2,600 degrees Fahrenheit — hot enough to melt steel — while keeping the instruments behind it shaded at a comfortable room temperature. In the hot but low-density corona, the spacecraft’s shield is expected to warm to 1,800 degrees Fahrenheit.
The spacecraft’s record close distance of 3.8 million miles may sound far, but on cosmic scales it’s incredibly close. If the solar system was scaled down with the distance between the Sun and Earth the length of a football field, Parker Solar Probe would be just four yards from the end zone — close enough to pass within the tenuous outer atmosphere of the Sun known as the corona. NASA/APL “It’s monumental to be able to get a spacecraft this close to the Sun,” said John Wirzburger, the Parker Solar Probe mission systems engineer at APL. “This is a challenge the space science community has wanted to tackle since 1958 and had spent decades advancing the technology to make it possible.”
By flying through the solar corona, Parker Solar Probe can take measurements that help scientists better understand how the region gets so hot, trace the origin of the solar wind (a constant flow of material escaping the Sun), and discover how energetic particles are accelerated to half the speed of light.
“The data is so important for the science community because it gives us another vantage point,” said Kelly Korreck, a program scientist at NASA Headquarters and heliophysicist who worked on one of the mission’s instruments. “By getting firsthand accounts of what’s happening in the solar atmosphere, Parker Solar Probe has revolutionized our understanding of the Sun.”
Previous passes have already aided scientists’ understanding of the Sun. When the spacecraft first passed into the solar atmosphere in 2021, it found the outer boundary of the corona is wrinkled with spikes and valleys, contrary to what was expected. Parker Solar Probe also pinpointed the origin of important zig-zag-shaped structures in the solar wind, called switchbacks, at the visible surface of the Sun — the photosphere.
Since that initial pass into the Sun, the spacecraft has been spending more time in the corona, where most of the critical physical processes occur.
This conceptual image shows Parker Solar Probe about to enter the solar corona. NASA/Johns Hopkins APL/Ben Smith “We now understand the solar wind and its acceleration away from the Sun,” said Adam Szabo, the Parker Solar Probe mission scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “This close approach will give us more data to understand how it’s accelerated closer in.”
Parker Solar Probe has also made discoveries across the inner solar system. Observations showed how giant solar explosions called coronal mass ejections vacuum up dust as they sweep across the solar system, and other observations revealed unexpected findings about solar energetic particles. Flybys of Venus have documented the planet’s natural radio emissions from its atmosphere, as well as the first complete image of its orbital dust ring.
So far, the spacecraft has only transmitted that it’s safe, but soon it will be in a location that will allow it to downlink the data it collected on this latest solar pass.
The data that will come down from the spacecraft will be fresh information about a place that we, as humanity, have never been.
Joe Westlake
Heliophysics Division Director, NASA Headquarters
“The data that will come down from the spacecraft will be fresh information about a place that we, as humanity, have never been,” said Joe Westlake, the director of the Heliophysics Division at NASA Headquarters. “It’s an amazing accomplishment.”
The spacecraft’s next planned close solar passes come on March 22, 2025, and June 19, 2025.
By Mara Johnson-Groh
NASA’s Goddard Space Flight Center, Greenbelt, Md.
Media Contact: Sarah Frazier
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Last Updated Dec 27, 2024 Editor Abbey Interrante Related Terms
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1 min read NASA’s Parker Solar Probe Touches The Sun For The First Time
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4 min read Final Venus Flyby for NASA’s Parker Solar Probe Queues Closest Sun Pass
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On Aug. 12, 2018, NASA launched Parker Solar Probe to the Sun, where it will…
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