Why NASA’s Roman Mission Will Study Milky Way’s Flickering Lights

NASA’s Nancy Grace Roman Space Telescope will provide one of the deepest-ever views into the heart of our Milky Way galaxy. The mission will monitor hundreds of millions of stars in search of tell-tale flickers that betray the presence of planets, distant stars, small icy objects that haunt the outskirts of our solar system, isolated black holes, and more. Roman will likely set a new record for the farthest-known exoplanet, offering a glimpse of a different galactic neighborhood that could be home to worlds quite unlike the more than 5,500 that are currently known.

Roman’s long-term sky monitoring, which will enable these results, represents a boon to what scientists call time-domain astronomy, which studies how the universe changes over time. Roman will join a growing, international fleet of observatories working together to capture these changes as they unfold. Roman’s Galactic Bulge Time-Domain Survey will focus on the Milky Way, using the telescope’s infrared vision to see through clouds of dust that can block our view of the crowded central region of our galaxy.

“Roman will be an incredible discovery machine, pairing a vast view of space with keen vision,” said Julie McEnery, the Roman senior project scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “Its time-domain surveys will yield a treasure trove of new information about the cosmos.”

When Roman launches, expected by May 2027, the mission will scour the center of the Milky Way for microlensing events, which occur when an object such as a star or planet comes into near-perfect alignment with an unrelated background star from our viewpoint. Because anything with mass warps the fabric of space-time, light from the distant star bends around the nearer object as it passes close by. The nearer object therefore acts as a natural magnifying glass, creating a temporary spike in the brightness of the background star’s light. That signal lets astronomers know there’s an intervening object, even if they can’t see it directly.

In current plans, the survey will involve taking an image every 15 minutes around the clock for about two months. Astronomers will repeat the process six times over Roman’s five-year primary mission for a combined total of more than a year of observations.

“This will be one of the longest exposures of the sky ever taken,” said Scott Gaudi, an astronomy professor at Ohio State University in Columbus, whose research is helping inform Roman’s survey strategy. “And it will cover territory that is largely uncharted when it comes to planets.”

Astronomers expect the survey to reveal more than a thousand planets orbiting far from their host stars and in systems located farther from Earth than any previous mission has detected. That includes some that could lie within their host star’s habitable zone – the range of orbital distances where liquid water can exist on the surface – and worlds that weigh in at as little as a few times the mass of the Moon.

Roman can even detect “rogue” worlds that don’t orbit a star at all using microlensing. These cosmic castaways may have formed in isolation or been kicked out of their home planetary systems. Studying them offers clues about how planetary systems form and evolve.

Roman’s microlensing observations will also help astronomers explore how common planets are around different types of stars, including binary systems. The mission will estimate how many worlds with two host stars are found in our galaxy by identifying real-life “Tatooine” planets, building on work started by NASA’s Kepler Space Telescope and TESS (the Transiting Exoplanet Survey Satellite).

Some of the objects the survey will identify exist in a cosmic gray area. Known as brown dwarfs, they’re too massive to be characterized as planets, but not quite massive enough to ignite as stars. Studying them will allow astronomers to explore the boundary between planet and star formation.

Roman is also expected to spot more than a thousand neutron stars and hundreds of stellar-mass black holes. These heavyweights form after a massive star exhausts its fuel and collapses. The black holes are nearly impossible to find when they don’t have a visible companion to signal their presence, but Roman will be able to detect them even if unaccompanied because microlensing relies only on an object’s gravity. The mission will also find isolated neutron stars – the leftover cores of stars that weren’t quite massive enough to become black holes.

Astronomers will use Roman to find thousands of Kuiper belt objects, which are icy bodies scattered mostly beyond Neptune. The telescope will spot some as small as about six miles across (about 1 percent of Pluto’s diameter), sometimes by seeing them directly from reflected sunlight and others as they block the light of background stars.

A similar type of shadow play will reveal 100,000 transiting planets between Earth and the center of the galaxy. These worlds cross in front of their host star as they orbit and temporarily dim the light we receive from the star. This method will reveal planets orbiting much closer to their host stars than microlensing reveals, and likely some that lie in the habitable zone.

Scientists will also conduct stellar seismology studies on a million giant stars. This will involve analyzing brightness changes caused by sound waves echoing through a star’s gaseous interior to learn about its structure, age, and other properties.

All of these scientific discoveries and more will come from Roman’s Galactic Bulge Time-Domain Survey, which will account for less than a fourth of the observing time in Roman’s five-year primary mission. Its broad view of space will allow astronomers to conduct many of these studies in ways that have never been possible before, giving us a new view of an ever-changing universe.

The Nancy Grace Roman Space Telescope is managed at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, with participation by NASA’s Jet Propulsion Laboratory and Caltech/IPAC in Southern California, the Space Telescope Science Institute in Baltimore, and a science team comprising scientists from various research institutions. The primary industrial partners are Ball Aerospace and Technologies Corporation in Boulder, Colorado; L3Harris Technologies in Melbourne, Florida; and Teledyne Scientific & Imaging in Thousand Oaks, California.

Download high-resolution video and images 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
301-286-1940

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Ashley Balzer

Follow NASA’s Starling Swarm in Real Time

NASA’s Starling CubeSats are zipping through low Earth orbit in the agency’s latest test of robotic swarm technologies for space.  The four Starling spacecraft, launched in July 2023, are testing a group of small satellites ability to coordinate and cooperate independently without real-time updates from mission control.

NASA invites the public to follow the Starling mission live in NASA’s Eyes on the Solar System 3D visualization, which uses real-time data in an interactive solar system simulation. The positions of the planets, moons, and spacecraft – including Starling – are shown as they travel through space.

The Starling mission, managed at NASA’s Ames Research Center in California’s Silicon Valley, will test multiple flight patterns and autonomous capabilities, including maneuvering to stay together as a group, creating and patching their own communications network, keeping track of each other’s relative position without use of GPS,  and autonomously changing their combined science data collection strategy based on the latest readings from onboard sensors.

Autonomous technologies are vital to NASA’s space science and exploration goals, especially when exploring environments far from Earth where signal delays make real-time maneuvering impractical or impossible. Satellites and spacecraft operating in a networked, autonomous, and coordinated capacity will help humanity explore the unknown and conduct better science than ever before.

NASA’s Ames Research Center leads the Starling project. NASA’s Small Spacecraft Technology program, based at Ames and within NASA’s Space Technology Mission Directorate (STMD), funds and manages the Starling mission. Blue Canyon Technologies designed and manufactured the spacecraft buses and is providing mission operations support. Rocket Lab USA, Inc. provided launch and integration services. Partners supporting Starling’s payload experiments include Stanford University’s Space Rendezvous Lab in Stanford, California, Emergent Space Technologies of Laurel, Maryland, CesiumAstro of Austin, Texas, L3Harris Technologies, Inc., of Melbourne, Florida, and NASA Ames – with funding support by NASA’s Game Changing Development program within STMD.

For news media:

Members of the news media interested in covering this topic should reach out to the NASA Ames newsroom.

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Arezu Sarvestani

NASA Awards NOAA’s QuickSounder Spacecraft Contract

NASA, on behalf of NOAA (National Oceanic and Atmospheric Administration), has awarded a delivery order under the Rapid Spacecraft Acquisition IV (Rapid-IV) contract to Southwest Research Institute of San Antonio for the QuickSounder spacecraft.

The firm-fixed-price delivery order covers all phases of QuickSounder’s operations to include spacecraft development, integration of NOAA’s Advanced Technology Microwave Sounder Engineering Development Unit, spacecraft shipment, supporting launch operations, three years of mission operations, and eventual spacecraft decommissioning.

The total value of the order is $54,973,400 with the period of performance beginning Wednesday, Oct. 25, and scheduled to run until May 2029.

QuickSounder is the first project in NOAA’s Near Earth Orbit Network. As a pathfinder mission, QuickSounder will support NOAA’s next generation satellite architecture for its future low Earth orbit program, which will provide mission-critical data to support NOAA’s National Weather Service and the nation’s weather industry.

Rapid IV contracts serve as a fast and flexible means for the government to acquire spacecraft and related components, equipment, and services in support of NASA missions and/or other federal government agencies. The spacecraft designs, related items, and services may be tailored, as needed, to meet the unique needs of each mission.

The Near Earth Orbit Network is a collaborative mission between NASA and NOAA. NASA will manage the development and launch of the satellites for NOAA, which will operate them and deliver data to users worldwide. NOAA, as the mission lead, provides funding, technical requirements, and post-launch operations. NASA and NOAA will work with commercial partners to design and build the network’s spacecraft and instruments.      

For information about NASA and agency programs, visit:

https://www.nasa.gov

-end-

Abbey Donaldson
Headquarters, Washington
202-358-1600
abbey.a.donaldson@nasa.gov

Jeremy Eggers
Goddard Space Flight Center, Greenbelt, Maryland
757-824-2958
jeremy.l.eggers@nasa.gov

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Roxana Bardan

Dr. Natasha Schatzman Receives the Vertical Flight Society (VFS) 2023 Francois-Xavier Bagnoud Award 

In May 2023, Dr. Natasha Schatzman received the Vertical Flight Society Francois-Xavier Bagnoud Award for her vertical flight research at NASA Ames Research Center.  This annual award is given to a VFS member who is thirty-five years old or younger for outstanding contributions to vertical flight technology.  The award announcement notes that Dr. Schatzman “was recognized for outstanding vertical lift research (internationally recognized in rotorcraft acoustics and full-scale wind tunnel acoustics testing), for extensive contributions to the VFS technical community and local VFS San Francisco Bay Area Chapter, and for outstanding mentorship in the rotorcraft field.”  She began her work at NASA Ames Research Center in 2008 as an intern, and she now oversees various acoustic experimental and computational key aspects of Revolutionary Vertical Life Technology (RVLT) Project, which includes leading rotor acoustic tests in the 40-foot by 80-Foot Wind Tunnel at NASA Ames Research Center.  Dr. Schatzman holds a Ph.D. in Aeronautical and Astronautical Engineering from the Georgia Institute of Technology. 

More information on this award is at:https://gallery.vtol.org/image/APwYX/?fbclid=IwAR0vRoQybkYvWeLGzOuqRhmw7TKuYXD1-EZSYKtgijvxfhzmwP58WIlSzBY

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Suzanne Cisneros

Management & Program Analyst

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NASA’s Dragonfly Tunnel Visions

Dragonfly Team Utilizes Unique NASA Facilities to Shape Its Innovative Titan-bound Rotorcraft 

With its dense atmosphere and low gravity, Saturn’s moon Titan is a great place to fly. 

But well before NASA’s Dragonfly rotorcraft lander soars through Titan’s skies, researchers on Earth – led by the Johns Hopkins Applied Physics Laboratory (APL) in Laurel, Maryland – are making sure their designs and models for the nuclear-powered, car-sized drone will work in a truly unique environment.

Dragonfly, NASA’s only mission to the surface of another ocean world, is designed to investigate the complex chemistry that is the precursor to life. The vehicle, which APL will build and operate, will be equipped with cameras, sensors and samplers to examine swaths of Titan known to contain organic materials that may, at some point in Titan’s complex history, have come in contact with liquid water beneath the organic-rich, icy surface. 

To transport those science instruments across the moon, Dragonfly’s four pairs of coaxial rotors (meaning one rotor is stacked above the other) will need to slice through Titan’s dense, nitrogen-rich atmosphere. Four times in the past three years, the mission team has headed to Virginia to test its flight systems in one-of-a-kind facilities at NASA’s Langley Research Center in Hampton, Virginia. 

Mission engineers have conducted two test campaigns in NASA Langley’s 14-by-22-foot Subsonic Tunnel, and two in the 16-foot Transonic Dynamics Tunnel (TDT).  They use the Subsonic Tunnel to validate computational fluid dynamics models and data gathered from integrated test platforms – terrestrial drones outfitted with Dragonfly-designed flight electronics. They use the variable-density heavy gas capabilities of the TDT to validate its models under simulated Titan atmospheric conditions — one aerodynamic stability test of the aeroshell that is used to deliver the Lander to a release point above Titan’s surface and one to model the Lander’s rotors aerodynamics. 

“All of these tests feed into our Dragonfly Titan simulations and performance predictions,” said Ken Hibbard, Dragonfly mission systems engineer at APL. 

On its latest trip to NASA Langley, in June, the team set up a half-scale Dragonfly lander model, complete with eight rotors, in the 14-by-22 Subsonic Tunnel. Test lead Bernadine Juliano of APL said the campaign focused on two flight configurations: Dragonfly’s descent and transition to powered flight upon arrival at Titan, and forward flight over Titan’s surface. 

“We tested conditions across the expected flight envelope at a variety of wind speeds, rotor speeds, and flight angles to assess the aerodynamic performance of the vehicle,” she said. “We completed more than 700 total runs, encompassing over 4,000 individual data points. All test objectives were successfully accomplished and the data will help increase confidence in our simulation models on Earth before extrapolating to Titan conditions.”

APL engineers are analyzing the 14-by-22 test data with mission flight team partners at the University of Central Florida, Penn State University, Lockheed Martin Sikorsky, NASA Langley and NASA Ames Research Center in Silicon Valley, California. Rick Heisler, the Dragonfly wind tunnel test lead from APL who heads the TDT test campaigns, said each trip to NASA Langley has given the team a chance to hone its technical models and designs and, specifically in the TDT, gain a better idea of how Dragonfly’s rotors will perform in Titan’s exotic atmosphere.  

“The heavy gas environment in the TDT has a density three-and-a-half times higher than air while operating at sea level ambient pressure and temperature,” Heisler said, “This allows the rotors to operate at near-Titan conditions and better replicate the lift and dynamic loading the actual lander will experience. The data we acquire are used to validate predictions of the lander aerodynamics, aero-structural performance and rotor fatigue life in the harsh cryogenic environment on Titan.”

“With Dragonfly, we’re turning science fiction into exploration fact,” Hibbard said. “The mission is coming together piece by piece, and we’re excited for every next step toward sending this revolutionary rotorcraft across the skies and surface of Titan.” 

Part of NASA’s New Frontiers Program, Dragonfly is scheduled to launch no earlier than 2027 and arrive at Titan in the mid-2030s. Principal Investigator Elizabeth Turtle of APL leads a mission team that includes engineers, scientists and specialists from APL as well as NASA’s Goddard Space Flight Center in Greenbelt, Maryland; Lockheed Martin Space in Littleton, Colorado; NASA’s Ames Research Center in Silicon Valley, California; NASA’s Langley Research Center in Hampton, Virginia; Penn State University in State College, Pennsylvania; University of Central Florida in Orlando, Florida; Lockheed Martin Sikorsky in Stratford, Connecticut; Malin Space Science Systems in San Diego; Honeybee Robotics in Pasadena, California; NASA’s Jet Propulsion Laboratory in Southern California;  CNES (Centre National d’Etudes Spatiales) in Paris; the German Aerospace Center (DLR) in Cologne, Germany; and JAXA (Japan Aerospace Exploration Agency) in Tokyo. 

Learn more at www.nasa.gov/dragonfly

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Tricia Talbert