Project Manager – Goddard Space Flight Center

Growing up near Dover Air Force Base in Delaware, Jamie Dunn — now a project manager for NASA’s Nancy Grace Roman Space Telescope — naturally became interested in planes. While he initially wanted to be a pilot, he chose aerospace engineering as a college major.

“I originally had no plans to work in the space industry,” Jamie recalls. “I never imagined I’d be working at NASA.”

While pursuing his degree at the University of Maryland, he heard about a cooperative education program at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. He applied, was accepted, and has been at Goddard ever since.

“I started out as a thermal vacuum test engineer, first focusing on smaller stuff and then I worked my way up to doing more complicated tests,” he says. “Before getting into the co-op program, I didn’t even know that job existed.”

Jamie worked at Goddard mostly part-time while going to school and the role transitioned to a full-time job upon graduation. He continued working as a test engineer for several years and then became his group’s section head — his first supervisory role.

From there, Jamie became the integration and testing manager for the Wide Field Camera 3, which was flown on Hubble Space Telescope Servicing Mission 4. That role teed him up for subsequent positions with the James Webb Space Telescope’s ISIM (Integrated Science Instrument Module) — first as the integration and testing manager, then deputy project manager, and ultimately the manager.

“The thirteen years I was on ISIM were like thirty,” Jamie says. “It was a very complex role involving international partnerships, contractors, and in-house personnel. We overcame a lot of adversity over the years in completing our work, and I learned a tremendous amount to be applied to my career going forward.”

Following his time with Webb, Jamie spent a couple of years working on GOES-R (the Geostationary Operational Environmental Satellites–R Series), initially as deputy project manager and then project manager.

“The biggest change was that GOES is out-of-house, so none of the hardware was developed at Goddard,” Jamie says. “That’s a huge difference.”

In 2018, Jamie joined the Roman team in his current position of project manager.

“In project management, you’re there to keep the train on the tracks and get to the station on time,” he says. “I focus heavily on programmatics, working closely with mission systems and project science, whose primary focus is on technical performance and science return. And when you have a healthy balance between them all like we do, it turns out to be a very successful endeavor.”

A couple of years into the role, the COVID-19 pandemic struck.

“It’s hard to put a spacecraft together when you’re not allowed to come to work,” Jamie says. “It was difficult because no one had experienced anything like it before, so everyone was trying to figure it out as we went along. We really focused on the team dynamic, being mindful of personal circumstances while aggressively pushing to resume onsite.”

Now, the Roman mission is within a couple years of launch. Jamie’s looking forward to seeing all the engineering work translate into mind-boggling images of space. Roman will usher in a new era of cosmic surveys, discovering billions of cosmic objects at a rate never before seen in astrophysics.

“When we launch this thing, that’ll definitely be the highlight of my career,” he says. “It’s really an honor to work with such a brilliant and dedicated team.

For much of his time at NASA, Jamie has balanced running a project with running a household, taking care of three sons with his wife.

“There’s a surprising amount of overlap between the two, because at the end of the day, it all comes down to people,” he says. “A lot of the job is psychological; having good working relationships across the team is crucial for success. To others who are interested in pursuing a similar career, Jamie recommends avoiding the “rush to the top.” He says, “I think it’s very important to make sure you spend time along the way to learn your craft. There’s no substitute for experience, and there are a lot of people to listen to and learn from along the way. Then you’ll be better prepared when you do land the job you’re ultimately aiming for.”

By Ashley Balzer
NASA’s Goddard Space Flight Center

NASA’s Nancy Grace Roman Space Telescope team has successfully integrated the mission’s deployable aperture cover — a visor-like sunshade that will help prevent unwanted light from entering the telescope — to the outer barrel assembly, another structure designed to shield the telescope from stray light in addition to keeping it at a stable temperature.

“It’s been incredible to see these major components go from computer models to building and now integrating them,” said Sheri Thorn, an aerospace engineer working on Roman’s sunshade at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “Since it’s all coming together at Goddard, we get a front row seat to the process. We’ve seen it mature, kind of like watching a child grow up, and it’s a really gratifying experience.”

The sunshade functions like a heavy-duty version of blackout curtains you might use to keep your room extra dark. It will make Roman more sensitive to faint light from across the universe, helping astronomers see dimmer and farther objects. Made of two layers of reinforced thermal blankets, the sunshade is designed to remain folded during launch and deploy after Roman is in space. Three booms will spring upward when triggered electronically, raising the sunshade like a page in a pop-up book.

The sunshade blanket has an inner and outer layer separated by about an inch, much like a double-paned window. “We’re prepared for micrometeoroid impacts that could occur in space, so the blanket is heavily fortified,” said Brian Simpson, Roman’s deployable aperture cover lead at NASA Goddard. “One layer is even reinforced with Kevlar, the same thing that lines bulletproof vests. By placing some space in between the layers we reduce the risk that light would leak in, because it’s unlikely that the light would pass through both layers at the exact same points where the holes were.”
 
Over the course of a few hours, technicians meticulously joined the sunshade to the outer barrel assembly — both Goddard-designed components — in the largest clean room at NASA Goddard. The outer barrel assembly will help keep the telescope at a stable temperature and, like the sunshade, help shield the telescope from stray light and micrometeoroid impacts. It’s fitted with heaters to help ensure the telescope’s mirrors won’t experience wide temperature swings, which make materials expand and contract.
 
“Roman is made up of a lot of separate components that come together after years of design and fabrication,” said Laurence Madison, a mechanical engineer at NASA Goddard. “The deployable aperture cover and outer barrel assembly were built at the same time, and up until the integration the two teams mainly used reference drawings to make sure everything would fit together as they should. So the successful integration was both a proud moment and a relief!”

Both the sunshade and outer barrel assembly have been extensively tested individually, but now that they’re connected engineers are assessing them again. Following the integration, the team tested the sunshade deployment.
 
“Since the sunshade was designed to deploy in space, the system isn’t actually strong enough to deploy itself in Earth’s gravity,” said Matthew Neuman, a mechanical engineer working on Roman’s sunshade at NASA Goddard. “So we used a gravity negation system to offset its weight and verified that everything works as expected.”
 
Next, the components will undergo thermal vacuum testing together to ensure they will function as planned in the temperature and pressure environment of space. Then they’ll move to a shake test to assess their performance during the extreme vibrations they’ll experience during launch.
 
Technicians will join Roman’s solar panels to the outer barrel assembly and sunshade this spring, and then integrate them with the rest of the observatory by the end of the year. 
 
The mission has now passed a milestone called Key Decision Point-D, marking the official transition from the fabrication stage that culminated in the delivery of major components to the phase involving assembly, integration, testing, and launch. The Roman observatory remains on track for completion by fall 2026 and launch no later than May 2027.
 
To virtually tour an interactive version of the telescope, visit:
 
https://roman.gsfc.nasa.gov/interactive/

By Ashley Balzer
NASA’s Goddard Space Flight Center, Greenbelt, Md.

Media contact:

Claire Andreoli
NASA’s Goddard Space Flight Center, Greenbelt, Md.
301-286-1940

Astronomers may have discovered a scrawny star bolting through the middle of our galaxy with a planet in tow. If confirmed, the pair sets a new record for the fastest-moving exoplanet system, nearly double our solar system’s speed through the Milky Way.

The planetary system is thought to move at least 1.2 million miles per hour, or 540 kilometers per second.

“We think this is a so-called super-Neptune world orbiting a low-mass star at a distance that would lie between the orbits of Venus and Earth if it were in our solar system,” said Sean Terry, a postdoctoral researcher at the University of Maryland, College Park and NASA’s Goddard Space Flight Center in Greenbelt, Maryland. Since the star is so feeble, that’s well outside its habitable zone. “If so, it will be the first planet ever found orbiting a hypervelocity star.”

A paper describing the results, led by Terry, was published in The Astronomical Journal on February 10.

A Star on the Move

The pair of objects was first spotted indirectly in 2011 thanks to a chance alignment. A team of scientists combed through archived data from MOA (Microlensing Observations in Astrophysics) – a collaborative project focused on a microlensing survey conducted using the University of Canterbury Mount John Observatory in New Zealand — in search of light signals that betray the presence of exoplanets, or planets outside our solar system.

Microlensing occurs because the presence of mass warps the fabric of space-time. Any time an intervening object appears to drift near a background star, light from the star curves as it travels through the warped space-time around the nearer object. If the alignment is especially close, the warping around the object can act like a natural lens, amplifying the background star’s light.

In this case, microlensing signals revealed a pair of celestial bodies. Scientists determined their relative masses (one is about 2,300 times heavier than the other), but their exact masses depend on how far away they are from Earth. It’s sort of like how the magnification changes if you hold a magnifying glass over a page and move it up and down.

“Determining the mass ratio is easy,” said David Bennett, a senior research scientist at the University of Maryland, College Park and NASA Goddard, who co-authored the new paper and led the original study in 2011. “It’s much more difficult to calculate their actual masses.”

The 2011 discovery team suspected the microlensed objects were either a star about 20 percent as massive as our Sun and a planet roughly 29 times heavier than Earth, or a nearer “rogue” planet about four times Jupiter’s mass with a moon smaller than Earth.

To figure out which explanation is more likely, astronomers searched through data from the Keck Observatory in Hawaii and ESA’s (European Space Agency’s) Gaia satellite. If the pair were a rogue planet and moon, they’d be effectively invisible – dark objects lost in the inky void of space. But scientists might be able to identify the star if the alternative explanation were correct (though the orbiting planet would be much too faint to see).

They found a strong suspect located about 24,000 light-years away, putting it within the Milky Way’s galactic bulge — the central hub where stars are more densely packed. By comparing the star’s location in 2011 and 2021, the team calculated its high speed.

But that’s just its 2D motion; if it’s also moving toward or away from us, it must be moving even faster. Its true speed may even be high enough to exceed the galaxy’s escape velocity of just over 1.3 million miles per hour, or about 600 kilometers per second. If so, the planetary system is destined to traverse intergalactic space many millions of years in the future.

“To be certain the newly identified star is part of the system that caused the 2011 signal, we’d like to look again in another year and see if it moves the right amount and in the right direction to confirm it came from the point where we detected the signal,” Bennett said.

“If high-resolution observations show that the star just stays in the same position, then we can tell for sure that it is not part of the system that caused the signal,” said Aparna Bhattacharya, a research scientist at the University of Maryland, College Park and NASA Goddard who co-authored the new paper. “That would mean the rogue planet and exomoon model is favored.”

NASA’s upcoming Nancy Grace Roman Space Telescope will help us find out how common planets are around such speedy stars, and may offer clues to how these systems are accelerated. The mission will conduct a survey of the galactic bulge, pairing a large view of space with crisp resolution.

“In this case we used MOA for its broad field of view and then followed up with Keck and Gaia for their sharper resolution, but thanks to Roman’s powerful view and planned survey strategy, we won’t need to rely on additional telescopes,” Terry said. “Roman will do it all.”

Download additional images and video from NASA’s Scientific Visualization Studio.

By Ashley Balzer
NASA’s Goddard Space Flight Center, Greenbelt, Md.

Media contact:

Claire Andreoli
NASA’s Goddard Space Flight Center, Greenbelt, Md.
301-286-1940