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Hubble Space Telescope Home Hubble Observes a Peculiar… Missions 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 Lithographs Fact Sheets Glossary Posters Hubble on the NASA App More Online Activities 2 min read
Hubble Observes a Peculiar Galaxy Shape
This NASA/ESA Hubble Space Telescope image features the galaxy, NGC 4694. ESA/Hubble & NASA, D. Thilker This NASA/ESA Hubble Space Telescope image reveals the galaxy, NGC 4694. Most galaxies fall into one of two basic types. Spiral galaxies are young and energetic, filled with the gas needed to form new stars and sporting spiral arms that host these hot, bright youths. Elliptical galaxies have a much more pedestrian look, and their light comes from a uniform population of older and redder stars. But some galaxies require in-depth study to classify their type: such is the case with NGC 4694, a galaxy located 54 million light-years from Earth in the Virgo galaxy cluster.
NGC 4694 has a smooth-looking, armless disk which — like an elliptical galaxy — is nearly devoid of star formation. Yet its stellar population is still relatively young and new stars are actively forming in its core, powering its bright center and giving it a markedly different stellar profile from that of a classic elliptical. Although elliptical galaxies often host significant quantities of dust, they generally do not hold the fuel needed to form new stars. NGC 4694 is filled with the hydrogen gas and dust normally seen in a young and sprightly spiral, and a huge cloud of invisible hydrogen gas surrounds the galaxy.
As this Hubble image reveals, NGC 4694’s dust forms chaotic structures that indicate some kind of disturbance. It turns out that the cloud of hydrogen gas around NGC 4694 forms a long bridge to a nearby, faint dwarf galaxy named VCC 2062. The two galaxies have undergone a violent collision, and the larger NGC 4694 is accreting gas from the smaller galaxy. This collision helped give NGC 4694 its peculiar shape and star-forming activity that classify it as a lenticular galaxy. Lenticular galaxies lack the unmistakable arms of a spiral, but still have a central bulge and disk. They also hold more star-forming gas than an elliptical galaxy. Some galaxies, like NGC 4694, aren’t as easy to categorize as one type or the other. It takes a bit more digging to reveal their true nature, and thanks to Hubble, we have the ability to uncover their secrets.
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Claire Andreoli
NASA’s Goddard Space Flight Center, Greenbelt, MD
claire.andreoli@nasa.gov
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Last Updated Oct 04, 2024 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Related Terms
Astrophysics Astrophysics Division Galaxies Goddard Space Flight Center Hubble Space Telescope Lenticular Galaxies Missions 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 on the NASA App
Hubble’s Galaxies
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By NASA
5 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
Two NASA employees, Howard Chang and Bradley Williams, were named as two of the “20 under 35 of 2024” by the Space and Satellite Professionals International. The award recognizes outstanding young professionals in the space industry.
Photos courtesy of Bradley Williams and Howard Chang The annual list of “20 Under 35” features 20 employees and entrepreneurs to keep your eye on in coming years. They were selected from nominations submitted by the membership and evaluated by the same panel of judges who name winners of the Promise Awards.
Howard Chang is an Assistant Chief Counsel at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. Bradley (Brad) Williams is the Acting Associate Director for Flight, Heliophysics Division, NASA Science Mission Directorate at NASA Headquarters, Washington.
“I’m honored to be named in this year’s cohort,” Chang said. “I saw how SSPI connects people across the space and satellite industry—across generations, countries, and even disciplines—to build up the space economy of the future. And I can’t express enough thanks to all my NASA colleagues for their support and kindness—especially Deputy Chief Counsel Amber Hufft for her time and mentorship this year.”
“It is an absolute honor to be recognized by SSPI on the 20 under 35 list of 2024,” said Williams. “I feel privileged to have benefitted from the opportunities I’ve had so far in my career. I want to thank the numerous mentors through the years who have provided me guidance and lessons learned and especially my colleagues and the leaders at NASA who have recognized my contributions and supported my growth potential as a leader.”
About Howard Chang
Howard Chang serves as the lead attorney for NASA’s Wallops Flight Facility’s commercial, nonprofit, and interagency partnerships in Wallops Island, Virginia. He also focuses on legal issues involving Unmanned Aircraft Systems (UAS), small UAS, real property transactions, government contracts litigation and administration supporting NASA Goddard, and partnerships involving the Goddard Institute for Space Studies located at Columbia University, New York, NASA commended Chang with an individual merit award in recognition of his superior support to the Goddard Space Flight Center during his first six months.
In addition to his legal work, Chang contributes substantially to thought leadership in space law and policy. He has authored articles for The Federalist and the International Institute of Space Law on topics from the Apollo 8 mission to the travaux preparatoires of the Principles Declaration of 1963—the precursor to the Outer Space Treaty. He is a frequent speaker on matters of space law. He will be presenting at the 2024 International Astronautical Congress in Milan, Italy on the Wolf Amendment and the future of the International Space Station. In Milan, he will present in his capacity as an Advisor for the Georgetown University Space Initiative. He continues to serve as a guest lecturer on space policy for law schools and undergraduate space courses as well.
Chang previously worked at an international firm in its aerospace finance and space law practices, engaging in litigation, transactional, regulatory, and policy work for aerospace and space companies. In addition, he worked on white-collar criminal defense, internal corporate investigations, congressional investigations, trial litigation, appellate litigation, and national security matters.
About Bradley Williams
Bradley Williams is the acting Associate Director for Flight Programs in the Heliophysics Division of the Science Mission Directorate at NASA Headquarters, Washington where he oversees more than a dozen missions in operations and approximately another dozen missions in different stages of development.
Previously, Williams was a Program Executive in the Heliophysics Division where his assignments included IMAP, TRACERS, HelioSwarm, the Solar Cruiser solar sail technology project, and Senior Program Executive of the NASA Space Weather Program.
Before joining NASA, he was the Director of Civil Space Programs at Terran Orbital Corporation, where he led the spacecraft development for both commercial and NASA technology demonstration missions and assisted with the growth of the science mission portfolio.
Previously at the University of Arizona, he worked with faculty and research teams to identify proposal opportunities and develop spaceflight proposals. Williams was a vital member of the OSIRIS-REx Camera Suite (OCAMS) team. He also served as the Deputy Payload Manager on GUSTO, the first of its kind, balloon-borne observatory.
He has been recognized for his achievements being named a Via Satellite Rising Star in 2024 and has been awarded the Robert H. Goddard Engineering Team Award, NASA Group Achievement Award, and asteroid (129969) Bradwilliams named in his honor.
The “20 Under 35“ are honored each year at SSPI’s Future Leaders Dinner. At the Dinner, SSPI presents the three top-ranked members of the 20 Under 35 with a Promise Award, recognizing them as leaders of their year’s cohort, and honors the Mentor of the Year for fostering young talent, both within his or her organization and throughout the industry. The 2024 “20 Under 35” will be honored at the Future Leaders Celebration on October 21, 2024 during Silicon Valley Space Week.
Rob Gutro
NASA’s Goddard Space Flight Center
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Last Updated Oct 03, 2024 EditorJamie AdkinsContactRob Garnerrob.garner@nasa.gov Related Terms
General Goddard Space Flight Center People of Goddard People of NASA
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By NASA
Hubble Space Telescope Home Hubble Captures Steller… 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 Lithographs Fact Sheets Glossary Posters Hubble on the NASA App More Online Activities 2 min read
Hubble Captures Steller Nurseries in a Majestic Spiral
This NASA/ESA Hubble Space Telescope image features the spiral galaxy IC 1954. ESA/Hubble & NASA, D. Thilker, J. Lee and the PHANGS-HST Team This image from the NASA/ESA Hubble Space Telescope features the spiral galaxy IC 1954, located 45 million light-years from Earth in the constellation Horologium. It sports a glowing bar in its core, majestically winding spiral arms, and clouds of dark dust across it. Numerous glowing, pink spots across the disc of the galaxy are H-alpha regions that offer astronomers a view of star-forming nebulae, which are prominent emitters of red, H-alpha light. Some astronomers theorize that the galaxy’s ‘bar’ is actually an energetic star-forming region that just happens to lie over the galactic center.
The data featured in this image come from a program that extends the cooperation among multiple observatories: Hubble, the infrared James Webb Space Telescope, and the Atacama Large Millimeter/submillimeter Array, a ground-based radio telescope. By surveying IC 1954 and over 50 other nearby galaxies in radio, infrared, optical, and ultraviolet light, astronomers aim to fully trace and reconstruct the path matter takes through stars, mapping the interstellar gas and dust in each galaxy. Hubble’s observing capabilities form an important part of this survey: it can capture younger stars and star clusters when they are brightest at ultraviolet and optical wavelengths, and its H-alpha filter effectively tracks emission from nebulae. The resulting dataset will form a treasure trove of research on the evolution of stars in galaxies, which Webb can build upon as it continues its science operations into the future.
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Facebook logo @NASAHubble @NASAHubble Instagram logo @NASAHubble Media Contact:
Claire Andreoli
NASA’s Goddard Space Flight Center, Greenbelt, MD
claire.andreoli@nasa.gov
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Last Updated Sep 26, 2024 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Related Terms
Astrophysics Astrophysics Division Galaxies Hubble Space Telescope Spiral Galaxies Stars 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
Science Behind the Discoveries
Universe Uncovered
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