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By NASA
ESA/Hubble & NASA, M. J. Koss, A. J. Barth The light that the NASA/ESA Hubble Space Telescope collected to create this image reached the telescope after a journey of 250 million years. Its source was the spiral galaxy UGC 11397, which resides in the constellation Lyra (The Lyre). At first glance, UGC 11397 appears to be an average spiral galaxy: it sports two graceful spiral arms that are illuminated by stars and defined by dark, clumpy clouds of dust.
What sets UGC 11397 apart from a typical spiral lies at its center, where a supermassive black hole containing 174 million times the mass of our Sun grows. As a black hole ensnares gas, dust, and even entire stars from its vicinity, this doomed matter heats up and puts on a fantastic cosmic light show.
Material trapped by the black hole emits light from gamma rays to radio waves, and can brighten and fade without warning. But in some galaxies, including UGC 11397, thick clouds of dust hide much of this energetic activity from view in optical light. Despite this, UGC 11397’s actively growing black hole was revealed through its bright X-ray emission — high-energy light that can pierce the surrounding dust. This led astronomers to classify it as a Type 2 Seyfert galaxy, a category used for active galaxies whose central regions are hidden from view in visible light by a donut-shaped cloud of dust and gas.
Using Hubble, researchers will study hundreds of galaxies that, like UGC 11397, harbor a supermassive black hole that is gaining mass. The Hubble observations will help researchers weigh nearby supermassive black holes, understand how black holes grew early in the universe’s history, and even study how stars form in the extreme environment found at the very center of a galaxy.
Text credit: ESA
Image credit: ESA/Hubble & NASA, M. J. Koss, A. J. Barth
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By NASA
2 min read
Hubble Captures an Active Galactic Center
This Hubble image shows the spiral galaxy UGC 11397. ESA/Hubble & NASA, M. J. Koss, A. J. Barth The light that the NASA/ESA Hubble Space Telescope collected to create this image reached the telescope after a journey of 250 million years. Its source was the spiral galaxy UGC 11397, which resides in the constellation Lyra (The Lyre). At first glance, UGC 11397 appears to be an average spiral galaxy: it sports two graceful spiral arms that are illuminated by stars and defined by dark, clumpy clouds of dust.
What sets UGC 11397 apart from a typical spiral lies at its center, where a supermassive black hole containing 174 million times the mass of our Sun grows. As a black hole ensnares gas, dust, and even entire stars from its vicinity, this doomed matter heats up and puts on a fantastic cosmic light show.
Material trapped by the black hole emits light from gamma rays to radio waves, and can brighten and fade without warning. But in some galaxies, including UGC 11397, thick clouds of dust hide much of this energetic activity from view in optical light. Despite this, UGC 11397’s actively growing black hole was revealed through its bright X-ray emission — high-energy light that can pierce the surrounding dust. This led astronomers to classify it as a Type 2 Seyfert galaxy, a category used for active galaxies whose central regions are hidden from view in visible light by a donut-shaped cloud of dust and gas.
Using Hubble, researchers will study hundreds of galaxies that, like UGC 11397, harbor a supermassive black hole that is gaining mass. The Hubble observations will help researchers weigh nearby supermassive black holes, understand how black holes grew early in the universe’s history, and even study how stars form in the extreme environment found at the very center of a galaxy.
Facebook logo @NASAHubble @NASAHubble Instagram logo @NASAHubble Media Contact:
Claire Andreoli (claire.andreoli@nasa.gov)
NASA’s Goddard Space Flight Center, Greenbelt, MD
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Last Updated Jun 27, 2025 Related Terms
Hubble Space Telescope Keep Exploring Discover More Topics From Hubble
Hubble Space Telescope
Since its 1990 launch, the Hubble Space Telescope has changed our fundamental understanding of the universe.
Hubble’s Galaxies
Galaxy Details and Mergers
Hubble’s Night Sky Challenge
View the full article
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By NASA
Explore Hubble 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 Multimedia Images Videos Sonifications Podcasts e-Books Online Activities 3D Hubble Models Lithographs Fact Sheets Posters Hubble on the NASA App Glossary News Hubble News Social Media Media Resources More 35th Anniversary Online Activities 2 min read
Hubble Studies Small but Mighty Galaxy
This NASA/ESA Hubble Space Telescope features the nearby galaxy NGC 4449. ESA/Hubble & NASA, E. Sabbi, D. Calzetti, A. Aloisi This portrait from the NASA/ESA Hubble Space Telescope puts the nearby galaxy NGC 4449 in the spotlight. The galaxy is situated just 12.5 million light-years away in the constellation Canes Venatici (the Hunting Dogs). It is a member of the M94 galaxy group, which is near the Local Group of galaxies that the Milky Way is part of.
NGC 4449 is a dwarf galaxy, which means that it is far smaller and contains fewer stars than the Milky Way. But don’t let its small size fool you — NGC 4449 packs a punch when it comes to making stars! This galaxy is currently forming new stars at a much faster rate than expected for its size, which makes it a starburst galaxy. Most starburst galaxies churn out stars mainly in their centers, but NGC 4449 is alight with brilliant young stars throughout. Researchers believe that this global burst of star formation came about because of NGC 4449’s interactions with its galactic neighbors. Because NGC 4449 is so close, it provides an excellent opportunity for Hubble to study how interactions between galaxies can influence the formation of new stars.
Hubble released an image of NGC 4449 in 2007. This new version incorporates several additional wavelengths of light that Hubble collected for multiple observing programs. These programs encompass an incredible range of science, from a deep dive into NGC 4449’s star-formation history to the mapping of the brightest, hottest, and most massive stars in more than two dozen nearby galaxies.
The NASA/ESA/CSA James Webb Space Telescope has also observed NGC 4449, revealing in intricate detail the galaxy’s tendrils of dusty gas, glowing from the intense starlight radiated by the flourishing young stars.
Text Credit: ESA/Hubble
Facebook logo @NASAHubble @NASAHubble Instagram logo @NASAHubble Media Contact:
Claire Andreoli (claire.andreoli@nasa.gov)
NASA’s Goddard Space Flight Center, Greenbelt, MD
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Last Updated Jun 20, 2025 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Related Terms
Hubble Space Telescope Astrophysics Astrophysics Division Galaxies Goddard Space Flight Center Irregular Galaxies The Universe Keep Exploring Discover More Topics From Hubble
Hubble Space Telescope
Since its 1990 launch, the Hubble Space Telescope has changed our fundamental understanding of the universe.
Hubble’s Galaxies
Galaxy Details and Mergers
Hubble’s Night Sky Challenge
View the full article
-
By NASA
Explore Hubble 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 Multimedia Images Videos Sonifications Podcasts e-Books Online Activities 3D Hubble Models Lithographs Fact Sheets Posters Hubble on the NASA App Glossary News Hubble News Social Media Media Resources More 35th Anniversary Online Activities 2 min read
Hubble Studies a Spiral’s Supernova Scene
This NASA/ESA Hubble Space Telescope image features the barred spiral galaxy IC 758. ESA/Hubble & NASA, C. Kilpatrick This serene spiral galaxy hides a cataclysmic past. The galaxy IC 758, shown in this NASA/ESA Hubble Space Telescope image, is situated 60 million light-years away in the constellation Ursa Major.
Hubble captured this image in 2023. IC 758 appears peaceful, with its soft blue spiral arms curving gently around its hazy barred center. However, in 1999, astronomers spotted a powerful explosion in this galaxy. The supernova SN 1999bg marked the dramatic end of a star far more massive than the Sun.
Researchers do not know exactly how massive this star was before it exploded, but will use these Hubble observations to measure the masses of stars in SN 1999bg’s neighborhood. These measurements will help them estimate the mass of the star that went supernova. The Hubble data may also reveal whether SN 1999bg’s progenitor star had a companion, which would provide additional clues about the star’s life and death.
A supernova represents more than just the demise of a single star — it’s also a powerful force that can shape its neighborhood. When a massive star collapses, triggering a supernova, its outer layers rebound off its shrunken core. The explosion stirs the interstellar soup of gas and dust out of which new stars form. This interstellar shakeup can scatter and heat nearby gas clouds, preventing new stars from forming, or it can compress them, creating a burst of new star formation. The cast-off layers enrich the interstellar medium, from which new stars form, with heavy elements manufactured in the core of the supernova.
Text Credit: ESA/Hubble
Facebook logo @NASAHubble @NASAHubble Instagram logo @NASAHubble Media Contact:
Claire Andreoli (claire.andreoli@nasa.gov)
NASA’s Goddard Space Flight Center, Greenbelt, MD
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Details
Last Updated Jun 13, 2025 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Related Terms
Hubble Space Telescope Astrophysics Astrophysics Division Galaxies Goddard Space Flight Center Spiral Galaxies The Universe Keep Exploring Discover More Topics From Hubble
Hubble Space Telescope
Since its 1990 launch, the Hubble Space Telescope has changed our fundamental understanding of the universe.
Hubble’s Galaxies
Homing in on Cosmic Explosions
Hubble’s Night Sky Challenge
View the full article
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By NASA
Keith Barr was born only months before the historic Apollo 11 landing in 1969. While he was too young to witness that giant leap for mankind, the moment sparked a lifelong fascination that set him on a path to design technology that will carry astronauts farther into space than ever before.
Today, Barr serves as a chief engineer and Orion Docking Lidar Field Test lead at NASA’s Johnson Space Center in Houston. He spearheads the field testing of docking lidars for the Orion spacecraft, which will carry astronauts to the Moon on the Artemis III mission. These lidars are critical to enabling Orion to autonomously dock with the human landing system on Artemis III — the mission that will land astronauts near the Moon’s South Pole for the first time in history.
Keith Barr prepares for a wind lidar test flight in one of the U.S. Navy’s Twin Otter aircraft in support of the AC-130 Gunship lidar program. “The Mercury, Gemini, and Apollo missions are some of humanity’s greatest technical achievements,” he said. “To be part of the Artemis chapter is a profound honor.”
In recognition of his contributions, Barr was selected as a NASA Space Flight Awareness Honoree in 2025 for his exceptional dedication to astronaut safety and mission success. Established in 1963, NASA’s Space Flight Awareness Program celebrates individuals who play a vital role in supporting human spaceflight. The award is one of the highest honors presented to the agency’s workforce.
With a career spanning over 25 years at Lockheed Martin, Barr is now recognized as a renowned leader in lidar systems—technologies that use laser light to measure distances. He has led numerous lidar deployments and test programs across commercial aviation, wind energy, and military markets.
In 2019, Barr and his team began planning a multi-phase field campaign to validate Orion’s docking lidars under real-world conditions. They repurposed existing hardware, developed a drone-based simulation system, and conducted dynamic testing at Lockheed Martin facilities in Littleton, Colorado, and Santa Cruz, California.
In Littleton, the team conducted two phases of testing at the Space Operations Simulation Center, evaluating performance across distances ranging from 50 meters to docking. At the Santa Cruz facility, they began much farther out at 6,500 meters and tested down to 10 meters, just before the final docking phase.
Of all these efforts, Barr is especially proud of the ingenuity behind the Santa Cruz tests. To simulate a spacecraft docking scenario, he repurposed a lidar pointing gimbal and test trailer from previous projects and designed a drone-based test system with unprecedented accuracy.
“An often-overlooked portion of any field campaign is the measurement and understanding of truth,” he said. “The system I designed allowed us to record lidar and target positions with accuracy never before demonstrated in outdoor docking lidar testing.”
Testing at the Santa Cruz Facility in California often began before sunrise and continued past sunset to complete the full schedule. Here, a drone hovers at the 10-meter station-keeping waypoint as the sun sets in the background. The test stand at the Santa Cruz Facility had once been used for Agena upper stage rockets—a key piece of hardware used during the Gemini program in the 1960s. “We found a Gemini-era sticker on the door of the test bunker—likely from the time of Gemini VIII, the first space docking completed by Neil Armstrong and David Scott,” Barr said. “This really brought it home to me that we are simply part of the continuing story.”
Keith Barr operates a wind lidar during a live fire test in an AC-130 Gunship aircraft. He is seated next to an open door while flying at 18,000 feet over New Mexico in January 2017. Barr spent more than two decades working on WindTracer—a ground-based Doppler wind lidar system used to measure wind speed and turbulence at airports, wind farms, and in atmospheric research.
The transition from WindTracer to Orion presented new challenges. “Moving onto a space program has a steep learning curve, but I have found success in this new arena and I have learned that I can adapt and I shouldn’t be nervous about the unknown,” he said. “Learning new technologies, applications, and skills keeps my career fun and exciting and I look forward to the next giant leap—whatever it is.”
Keith Barr stands beside the Piper Cherokee 6 aircraft during his time as a captain for New England Airlines. Barr’s passion for flight moves in tandem with his pursuit of innovation. Over his career, he has flown over 1.6 million miles on commercial airlines. “I often joke that I’m on my fourth trip to the Moon and back—just in economy class,” he said.
Before specializing in lidar systems, Barr flew as a captain and assistant chief pilot at New England Airlines, operating small aircraft like the Piper Cherokee 6 and the Britten-Norman Islander.
He also worked at the National Center for Atmospheric Research, contributing to several NASA airborne missions aimed at unraveling the science behind global ozone depletion.
Keith Barr boards NASA’s DC-8 aircraft at Ames Research Center in California before heading to Salina, Kansas, to support a 1996 research mission studying how airplane emissions affect clouds and the atmosphere. As Barr reflects on his journey, he hopes to pass along a sense of legacy to the Artemis Generation. “We are in the process of writing the next chapter of human space exploration history, and our actions, successes, and troubles will be studied and analyzed well into the future,” he said. “We all need to consider how our actions will shape history.”
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