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By NASA
5 Min Read NASA’s Webb Peers into the Extreme Outer Galaxy
This image shows a portion of the star-forming region, known as Digel Cloud 2S (full image below). Credits:
NASA, ESA, CSA, STScI, M. Ressler (JPL) Astronomers have directed NASA’s James Webb Space Telescope to examine the outskirts of our Milky Way galaxy. Scientists call this region the Extreme Outer Galaxy due to its location more than 58,000 light-years away from the Galactic Center. (For comparison, Earth is approximately 26,000 light-years from the center.)
A team of scientists used Webb’s NIRCam (Near-Infrared Camera) and MIRI (Mid-Infrared Instrument) to image select regions within two molecular clouds known as Digel Clouds 1 and 2. With its high degree of sensitivity and sharp resolution, the Webb data resolved these areas, which are hosts to star clusters undergoing bursts of star formation, in unprecedented detail. Details of this data include components of the clusters such as very young (Class 0) protostars, outflows and jets, and distinctive nebular structures.
These Webb observations, which came from telescope time allocated to Mike Ressler of NASA’s Jet Propulsion Laboratory in Southern California, are enabling scientists to study star formation in the outer Milky Way in the same depth of detail as observations of star formation in our own solar neighborhood.
“In the past, we knew about these star forming regions but were not able to delve into their properties,” said Natsuko Izumi of Gifu University and the National Astronomical Observatory of Japan, lead author of the study. “The Webb data builds upon what we have incrementally gathered over the years from prior observations with different telescopes and observatories. We can get very powerful and impressive images of these clouds with Webb. In the case of Digel Cloud 2, I did not expect to see such active star formation and spectacular jets.”
Image A: Extreme Outer Galaxy (NIRCam and MIRI)
Scientists used NASA’s James Webb Space Telescope to examine select star-forming areas in the Extreme Outer Galaxy in near- and mid-infrared light. Within this star-forming region, known as Digel Cloud 2S, the telescope observed young, newly formed stars and their extended jets of material. This Webb image also shows a dense sea of background galaxies and red nebulous structures within the region. In this image, colors were assigned to different filters from Webb’s MIRI and NIRCam: red (F1280W, F770W, F444W), green (F356W, F200W), and blue (F150W; F115W). NASA, ESA, CSA, STScI, M. Ressler (JPL) Stars in the Making
Although the Digel Clouds are within our galaxy, they are relatively poor in elements heavier than hydrogen and helium. This composition makes them similar to dwarf galaxies and our own Milky Way in its early history. Therefore, the team took the opportunity to use Webb to capture the activity occurring in four clusters of young stars within Digel Clouds 1 and 2: 1A, 1B, 2N, and 2S.
For Cloud 2S, Webb captured the main cluster containing young, newly formed stars. This dense area is quite active as several stars are emitting extended jets of material along their poles. Additionally, while scientists previously suspected a sub-cluster might be present within the cloud, Webb’s imaging capabilities confirmed its existence for the first time.
“We know from studying other nearby star-forming regions that as stars form during their early life phase, they start emitting jets of material at their poles,” said Ressler, second author of the study and principal investigator of the observing program. “What was fascinating and astounding to me from the Webb data is that there are multiple jets shooting out in all different directions from this cluster of stars. It’s a little bit like a firecracker, where you see things shooting this way and that.”
The Saga of Stars
The Webb imagery skims the surface of the Extreme Outer Galaxy and the Digel Clouds, and is just a starting point for the team. They intend to revisit this outpost in the Milky Way to find answers to a variety of current mysteries, including the relative abundance of stars of various masses within Extreme Outer Galaxy star clusters. This measurement can help astronomers understand how a particular environment can influence different types of stars during their formation.
“I’m interested in continuing to study how star formation is occurring in these regions. By combining data from different observatories and telescopes, we can examine each stage in the evolution process,” said Izumi. “We also plan to investigate circumstellar disks within the Extreme Outer Galaxy. We still don’t know why their lifetimes are shorter than in star-forming regions much closer to us. And of course, I’d like to understand the kinematics of the jets we detected in Cloud 2S.”
Though the story of star formation is complex and some chapters are still shrouded in mystery, Webb is gathering clues and helping astronomers unravel this intricate tale.
These findings have been published in the Astronomical Journal.
The observations were taken as part of Guaranteed Time Observation program 1237.
The James Webb Space Telescope is the world’s premier space science observatory. Webb is solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the mysterious structures and origins of our universe and our place in it. Webb is an international program led by NASA with its partners, ESA (European Space Agency) and CSA (Canadian Space Agency).
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Media Contacts
Laura Betz – laura.e.betz@nasa.gov, Rob Gutro – rob.gutro@nasa.gov
NASA’s Goddard Space Flight Center, Greenbelt, Md.
Christine Pulliam – cpulliam@stsci.edu, Abigail Major – amajor@stsci.edu
Space Telescope Science Institute, Baltimore, Md.
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Last Updated Sep 11, 2024 Editor Marty McCoy Contact Laura Betz laura.e.betz@nasa.gov Related Terms
Astrophysics Goddard Space Flight Center James Webb Space Telescope (JWST) Protostars Science & Research Star Clusters Star-forming Nebulae Stars The Milky Way The Universe View the full article
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By NASA
Linette Boisvert turned a childhood love of snow into a career as a sea ice scientist studying climate change.
Name: Linette Boisvert
Title: Assistant Lab Chief, Cryospheric Sciences Branch, and Deputy Project Scientist for the Aqua Satellite
Formal Job Classification: Sea Ice Scientist
Organization: Cryospheric Science Branch, Science Directorate (Code 615)
“When it snowed, school was cancelled so I loved winter weather, and I was fascinated how weather could impact our daily lives,” said Linette. “One of my undergraduate classes had a guest lecturer talk about the Arctic and that is when decided that I wanted to become an Arctic scientist.”Photo credit: NASA/Kyle Krabill What do you do and what is most interesting about your role here at Goddard?
As a sea ice scientist, I study interactions between the sea ice and the atmosphere. I’m interested in how the changing sea ice conditions and loss of Arctic ice are affecting the atmospheric conditions in the Artic.
Why did you become a sea ice scientist? What is your educational background?
I grew up in Maryland. When it snowed, school was cancelled so I loved winter weather, and I was fascinated how weather could impact our daily lives. One of my undergraduate classes had a guest lecturer talk about the Arctic and that is when decided that I wanted to become an Arctic scientist. This also coincided with the Arctic sea ice minimum in 2007, at the time, a record low.
In 2008, I got a B.S. in environmental science with a minor in math from the University of Maryland, Baltimore County (UMBC). I received my master’s and, in 2013, got a Ph.D. in atmospheric and oceanic sciences from the University of Maryland, College Park.
How did you come to Goddard?
My doctorate advisor worked at Goddard. In 2009, he brought me into Goddard’s lab to do my Ph.D. research. I became a post-doctorate in 2013, an assistant research scientist in 2016 (employed by UMD/ESSIC) and, in 2018, a civil servant.
Dr. Linette Boisvert is a sea ice scientist at NASA’s Goddard Space Flight Center in Greenbelt, Md. Photo credit: NASA/Jeremy Harbeck What is the most interesting field work you do as the assistant lab chief of Goddard’s Cryospheric Sciences Branch?
From 2018 to 2020, I was the deputy project scientist for NASA’s largest and longest running airborne campaign, Operation IceBridge. This involved flying aircraft with scientific instruments over both land ice and sea ice in the Arctic and Antarctic. Every spring, we would set up a base camp in a U.S. Air Force base in Greenland and fly over parts of the sea ice over Greenland and the Arctic, and in the fall we would base out of places like Punta Arenas, Chile, and Hobart, Australia, to fly over the Antarctic.
We would fly low, at 1,500 feet above the surface. It is very, very cool to see the ice firsthand. It is so pretty, so vast, and complex. We would spend 12 hours a day on a plane just surveying the ice.
Being based out of Greenland is very remote. Everything is white. Everything looks like it is closer than it is. You do not have a point of reference for any perspective. It is very quiet. There is no background ambient noise. You do not hear bugs, birds, or cars, just quiet.
Our team was about 20 people. Other people live at the base. The campaigns lasted six to eight weeks. I was there about three to four weeks each time. Many of the group had been doing these campaigns for a decade. I felt like I had joined a family. In the evenings, we would often cook dinner together and play games. On days we could not fly, we would go on adventures together like visiting a glacier or hiking. We saw musk ox, Arctic fox, Arctic hares, and seals.
How did it feel to become the deputy project scientist for the Aqua satellite, which provided most of the data you used for your doctorate and publications?
In January 2023, I became the deputy project scientist for the Aqua satellite, which launched in 2002. Aqua measures the Earth’s atmospheric temperature, humidity, and trace gases. Most of my doctorate and publications used data from Aqua to look at how the sea ice loss in the Arctic is allowing for excess heat and moisture from the ocean to move into the atmosphere resulting in a warmer and wetter Arctic.
I am honored. I feel like I have come full circle. The team welcomed me into the mission and taught me a lot of things. I am grateful to be working with such a brilliant, hardworking team.
Who is your science hero?
My father encouraged me to get a doctorate in science. My father has a doctorate in computer science and math. He works at the National Institute of Standards and Technology. I wanted to be like him when I was growing up. I came close, working at NASA, another part of the federal government. My mother, a French pastry chef, always kept me well fed.
“We would fly low, at 1,500 feet above the surface,” said Linette. “It is very, very cool to see the ice firsthand. It is so pretty, so vast, and complex. We would spend 12 hours a day on a plane just surveying the ice.”Photo credit: NASA/John Sonntag My father is very proud of me. He thinks I am more of a superstar than he was at my age, but I do not believe it. My mother is also proud and continues to keep me well fed.
Who is your Goddard mentor?
Claire Parkinson, now an emeritus, was the project scientist for Aqua since its inception. When she retired, she encouraged me to apply for the deputy position. She had confidence in me which gave me the confidence to apply for the position. She is still always available to answer any questions. I am very thankful that she has been there for me throughout my career.
What advice do you give to those you mentor?
I recently began advising young scientists; one undergraduate student, two graduate students, and one post-doctoral scientist. We meet weekly as a group and have one-on-one meetings when appropriate. They share their progress on their work. Sometimes we practice presentations they are about to give.
It is sometimes hard starting out to think that you are smart because Goddard is full of so many smart people. I tell them that they are just as capable when it comes to their research topic. I tell them that they fit in well with the Goddard community. I want to create a comfortable, respectful, and inclusive environment so that they remain in science.
What do you do for fun?
I enjoy running and paddle boarding with my dog Remi, my long-haired dachshund. I enjoy reading. I love to travel and be around friends and family. But I do not enjoy cooking, so I do not bake French pastries like my mom.
Where do you see yourself in five years?
I hope to continue doing research including field work. It would be great if some of my students finished their studies and joined my lab. I hope that I am still making people proud of me.
What is your “six-word memoir”? A six-word memoir describes something in just six words.
Hard-working. Smart. Inquisitive. Adventurous. Kind. Happy.
By Elizabeth M. Jarrell
NASA’s Goddard Space Flight Center, Greenbelt, Md.
Conversations With Goddard is a collection of Q&A profiles highlighting the breadth and depth of NASA’s Goddard Space Flight Center’s talented and diverse workforce. The Conversations have been published twice a month on average since May 2011. Read past editions on Goddard’s “Our People” webpage.
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Last Updated Sep 10, 2024 EditorMadison OlsonContactRob Garnerrob.garner@nasa.govLocationGoddard Space Flight Center Related Terms
People of Goddard Earth Goddard Space Flight Center Ice & Glaciers People of NASA Explore More
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By NASA
NASA and Boeing welcomed Starliner back to Earth following the uncrewed spacecraft’s successful landing at 10:01 p.m. MDT Sept. 6, 2024, at the White Sands Space Harbor in New Mexico. Credit: NASA NASA and Boeing safely returned the uncrewed Starliner spacecraft following its landing at 10:01 p.m. MDT Sept. 6 at White Sands Space Harbor in New Mexico, concluding a three-month flight test to the International Space Station.
“I am extremely proud of the work our collective team put into this entire flight test, and we are pleased to see Starliner’s safe return,” said Ken Bowersox, associate administrator, Space Operations Mission Directorate at NASA Headquarters in Washington. “Even though it was necessary to return the spacecraft uncrewed, NASA and Boeing learned an incredible amount about Starliner in the most extreme environment possible. NASA looks forward to our continued work with the Boeing team to proceed toward certification of Starliner for crew rotation missions to the space station.”
The flight on June 5 was the first time astronauts launched aboard the Starliner. It was the third orbital flight of the spacecraft, and its second return from the orbiting laboratory. Starliner now will ship to NASA’s Kennedy Space Center in Florida for inspection and processing.
NASA’s Commercial Crew Program requires a spacecraft to fly a crewed test flight to prove the system is ready for regular flights to and from the orbiting laboratory. Following Starliner’s return, the agency will review all mission-related data.
“We are excited to have Starliner home safely. This was an important test flight for NASA in setting us up for future missions on the Starliner system,” said Steve Stich, manager of NASA’s Commercial Crew Program. “There was a lot of valuable learning that will enable our long-term success. I want to commend the entire team for their hard work and dedication over the past three months.”
NASA astronauts Butch Wilmore and Suni Williams launched on June 5 aboard Starliner for the agency’s Boeing Crewed Flight Test from Cape Canaveral Space Force Station in Florida. On June 6, as Starliner approached the space station, NASA and Boeing identified helium leaks and experienced issues with the spacecraft’s reaction control thrusters. Following weeks of in-space and ground testing, technical interchange meetings, and agency reviews, NASA made the decision to prioritize safety and return Starliner without its crew. Wilmore and Williams will continue their work aboard station as part of the Expedition 71/72 crew, returning in February 2025 with the agency’s SpaceX Crew-9 mission.
The crew flight test is part of NASA’s Commercial Crew Program. The goal of NASA’s Commercial Crew Program is safe, reliable, and cost-effective transportation to and from the International Space Station and low Earth orbit. This already is providing additional research time and has increased the opportunity for discovery aboard humanity’s microgravity testbed, including helping NASA prepare for human exploration of the Moon and Mars.
Learn more about NASA’s Commercial Crew program at:
https://www.nasa.gov/commercialcrew
-end-
Joshua Finch / Jimi Russell
Headquarters, Washington
202-358-1100
joshua.a.finch@nasa.gov / james.j.russell@nasa.gov
Leah Cheshier
Johnson Space Center, Houston
281-483-5111
leah.d.cheshier@nasa.gov
Steve Siceloff / Danielle Sempsrott / Stephanie Plucinsky
Kennedy Space Center, Florida
321-867-2468
steven.p.siceloff@nasa.gov / danielle.c.sempsrott@nasa.gov / stephanie.n.plucinsky@nasa.gov
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Last Updated Sep 07, 2024 EditorJessica TaveauLocationNASA Headquarters Related Terms
Commercial Crew International Space Station (ISS) ISS Research View the full article
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By NASA
Tiny satellites, also known as CubeSats, are pictured after being deployed into Earth orbit from a small satellite orbital deployer on the outside of the International Space Station’s Kibo laboratory module. The CubeSats were delivered aboard the Northrop Grumman Cygnus space freighter and will serve a variety of educational and research purposes for public and private organizations around the world.
Image Credit: NASA/Tracy Dyson
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