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NASA JPL Scientists, Engineers Collaborate With Artists for Exhibition
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Preparations for Next Moonwalk Simulations Underway (and Underwater) Artist David Bowen works on “tele-present wind,” featuring grass stalks that move in response to Martian wind data previously collected by NASA’s Perseverance rover mission. Behind him sits JPL data systems architect Rishi Verma.NASA/JPL-CaltechWorks in ‘Blended Worlds: Experiments in Interplanetary Imagination,’ an exhibit in Glendale, California, help shrink the universe into something tangible.
The universe is vast and filled with countless worlds, but a new exhibit at the Brand Library & Art Center in Glendale, California, aims to shrink time and space. For “Blended Worlds: Experiments in Interplanetary Imagination,” artists collaborated with scientists and engineers from NASA’s Jet Propulsion Laboratory to create cross-disciplinary works that help illuminate the universe by bringing art and science together.
On view from Sept. 21, 2024, to Jan. 4, 2025, the exhibition is part of “PST ART: Art & Science Collide,” an event presented by the Getty and involving more than 70 exhibitions from museums and institutions across Southern California exploring the intersection of art and science.
“The magic of art is that it enhances our experiences and interactions with the world — and in this case, our universe,” said Dr. Laurie Leshin, director of JPL in Southern California. “We’re honored to work with great artists to bring the wonders of space to our community through this exhibition, which invites us all to be part of a grand journey of exploration and discovery.”
The 126 grass stalks of “tele-present wind” are attached to mechanical tilting devices that move in response to Martian wind data.NASA/JPL-CaltechDavid Bowen’s installation “tele-present wind” features grass stalks attached to tilting mechanical devices that move in response to Martian wind data previously collected by NASA’s Perseverance rover mission. Helping make the effort possible were Rishi Verma, a data systems architect at JPL, and José Antonio Rodríguez-Manfredi, the principal investigator of the Mars Environmental Dynamics Analyzer (MEDA) system on Perseverance.
For “Seismic Percussion,” artist Moon Ribas creates an interplanetary drum score by translating seismic data from Earth, the Moon, and Mars. For Mars data, JPL’s Verma worked with Nobuaki Fuji of the Institut de Physique du Globe de Paris, who collaborated on NASA’s now-retired InSight lander. Ceri Nunn, a JPL planetary scientist, assisted with moonquake data.
Also featured is a handwritten version of U.S. Poet Laureate Ada Limón’s “In Praise of Mystery: A Poem for Europa,” the poem she dedicated to NASA’s Europa Clipper mission, which is targeting an October launch and will make multiple flybys of Jupiter’s icy moon Europa. The poem has been etched onto a metal plate on the spacecraft and will ride with the orbiter on its long journey.
Additional works allow visitors to experience Earth’s wonders through scents, use sound to convey the vast distances between our planet and those beyond our solar system, and blend heartbeats and other Earthly sounds with sonified data from Europa’s magnetic field.
“We were looking to create imaginative opportunities for people to connect with each other as they connect with the awe-inspiring science being conducted today,” said David Delgado, a cultural strategist and the project lead at JPL. “I know this experience has really opened the eyes of everyone collaborating on the project, and we hope it does the same for people who come to see ‘Blended Worlds.’”
As part of PST ART, a number of public programs and community events will also accompany the “Blended Worlds” gallery exhibition, including “Blended Worlds: An Evening of Art, Theater, and Science” hosted by Reggie Watts at the Alex Theatre in Glendale on Oct. 5, and “Earth Data: The Musical,” an original musical developed by Theater Arts at Caltech exploring the challenges of climate research and science as a human pursuit at Caltech’s Ramo Auditorium Nov. 1 to 3.
Artists’ collaborations with JPL and the display of their works at Glendale’s Brand Library were made possible by the generous support of the Glendale Arts and Culture Commission and the Glendale Library, Arts & Culture Trust.
More About JPL
A division of Caltech in Pasadena, California, JPL began in 1936 and ultimately built and helped launch America’s first satellite, Explorer 1, in 1958. By the end of that year, Congress established NASA and JPL became a part of the agency. Since then, JPL has managed such historic missions as Voyager, Galileo, Cassini, the Mars Exploration Rover program, the Perseverance Mars rover, and many more.
More About Glendale Library, Arts & Culture
Founded in 1907, the Glendale Library, Arts & Culture Department includes eight neighborhood libraries including the Brand Library & Art Center, a regional visual arts and music library and performance venue housed in the historic 1904 mansion of Glendale pioneer Leslie C. Brand, and the Central Library, a 93,000-square-foot center for individuals and groups to convene, collaborate, and create. The department also serves as the chief liaison to the Glendale Arts and Culture Commission which works to continually transform Glendale into an ever-evolving arts destination. Glendale Library Arts & Culture is supported in part through the efforts of the Glendale Library Arts & Culture Trust (GLACT). For more information visit GlendaleLAC.org, or contact Library, Arts & Culture at 818-548-2021 or via email at LibraryInfo@GlendaleCA.gov. Follow on Instagram, Facebook, and X at @MyGlendaleLAC.
For more information about PST ART: Art & Science Collide, visit: pst.art
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Matthew Segal / Melissa Pamer
Jet Propulsion Laboratory, Pasadena, Calif.
818-354-8307 / 626-314-4928
matthew.j.segal@jpl.nasa.gov / melissa.pamer@jpl.nasa.gov
2024-120
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The True Size of Galaxies is Much Larger Than We Thought
Ask most people what a galaxy is made up of, and they’ll say it’s made of stars. Our own galaxy, the Milky Way, hosts between about 100 to 300 billion stars, and we can see thousands of them with our unaided eyes. But most of a galaxy’s mass is actually gas, and the extent of the gas has been difficult to measure.
Researchers have found a way to see how far that gas extends into the cosmos.
One of the foundational questions about galaxies concerns their size. If we limit our observations to stars, then our galaxy, for example, is about 26.8 kiloparsecs, or about 87,000 light-years, across. Our neighbour, Andromeda, is about 46.56 kpcs or 152,000 light-years across. But do these measurements really define the sizes?
In new research published in Nature Astronomy, researchers measured the reach of the gas that extends beyond a galaxy’s stellar population. It’s titled “An emission map of the disk–circumgalactic medium transition in starburst IRAS 08339+6517.” The lead author is Nikole Nielsen, a researcher with Swinburne University and ASTRO 3D and an Assistant Professor at the University of Oklahoma.
Galaxies have gaseous haloes that serve as reservoirs of star-forming material called the circumgalactic medium (CGM). The CGM interfaces with the intergalactic medium (IGM), which is yet more gas that exists between galaxies. The CGM is notoriously difficult to observe because it’s so diffuse and extended. But it makes up about 70% of a typical galaxy (ignoring dark matter) and plays an important role. “This diffuse reservoir of gas, the circumgalactic medium, acts as the interface between a galaxy and the cosmic web that connects galaxies,” the authors explain in their paper.
Astronomers rely on bright background objects to try to observe the CGM. Things like distant quasars, pulsars, or other galaxies can light up the gas and allow astronomers to measure its spectra. But that only works when things line up right, and it only produces a beam-like image of the galaxy.
In this new research, a team of astronomers found a different way of observing the CGM. They used the Keck Cosmic Web Imager (KCWI) on the 10-meter Keck telescope in Hawaii to observe the gas around IRAS 08339+6517. Rather than a limited, beam-like look at the gas, they were able to detect the clouds of gas well outside the typical confines of a galaxy, out to 100,000 light-years beyond the limit of the starlight that typically defines a galaxy.
“We present kiloparsec-scale-resolution integral field spectroscopy of emission lines that trace cool ionized gas from the centre of a nearby galaxy to 30 kpcs into its circumgalactic medium,” the authors write. In their paper, they explain that “… we obtain the equivalent of thousands of quasar sightlines around a single galaxy.”
IRAS 08339+6517 is a starburst galaxy about 56 kpcs away. A starburst galaxy is one that is birthing stars at an extraordinarily high rate. Hubble images show that it’s a face-on spiral galaxy, and 90% of its starlight is contained within a radius of about 2.4 kpcs. “Unlike normal spirals, it has quite extreme properties, with a star formation rate (SFR) = 12.1 solar masses yr-1) that is ~ 10 times higher than typical for its mass and stellar populations that are dominated by very young (~ 4 – 6 Myr) stars,” the authors write.
The researchers found that as the CGM extends beyond the galaxy, the physical properties of the hydrogen and oxygen in the gas changed. The change was ubiquitous at a certain distance and indicates that the gas is interacting with different energy sources.
“We found it everywhere we looked, which was really exciting and kind of surprising,” said lead author Nielsen. “We’re now seeing where the galaxy’s influence stops, the transition where it becomes part of more of what’s surrounding the galaxy, and, eventually, where it joins the wider cosmic web and other galaxies. These are all usually fuzzy boundaries.”
“But in this case, we seem to have found a fairly clear boundary in this galaxy between its interstellar medium and its circumgalactic medium,” said Professor Nielsen.
“In the CGM, the gas is being heated by something other than typical conditions inside galaxies; this likely includes heating from the diffuse emissions from the collective galaxies in the Universe, and possibly some contribution is due to shocks,” said Dr Nielsen.
The boundary is where the gas is heated differently inside the galaxy compared to outside the galaxy. Inside the galaxy’s disk, gas is being photoionized by HII (ionized atomic hydrogen) star-forming regions. At further distances, the gas is being ionized by shocks or the extragalactic UV background.
“It’s this interesting change that is important and provides some answers to the question of where a galaxy ends,” she says.
This figure from the research shows the spatial distribution of ionized gas in the CGM at kiloparsec scales. Emission from [Oiii] ?5007 in the CGM of IRAS08 extends to at least 30 kpc from the galaxy center. The blue rectangle represents the field-of-view of the KCWI pointing covering the galaxy disk (emission map not shown). HI contours indicate levels of constant HI column density from the Very Large Array, where a filament extends from IRAS08 towards a smaller companion galaxy 60 kpc away. Image Credit: Nielsen et al. 2024.These results make a contribution to one of the most interesting issues in astronomy: How do galaxies evolve?
Gas flows into galaxies and becomes fuel for more star formation. At the same time, gas flows out from a galaxy as part of stellar feedback. There are three broad types of galaxies: starburst galaxies with extreme amounts of star formation, quenched galaxies with very little star formation, and galaxies in between. The gas in the CGM and the IGM play roles in a galaxy’s gas budget.
IRAS08 has a remarkably strong outflow of gas, but its metallicity profile is flat and shallow. Astronomers typically assume that galaxies with these metallicities and high SFRs are acquiring significant amounts of gas. Other scientific observations of IRAS08 indicate “a rapid inflow of gas to the center of the disk that is fueling the very strong starburst and subsequently strong outflows,” the authors explain.
Gas flows into galaxies along spiralling filaments. This image of a galaxy shows a stream of inflowing gas, as rendered in a supercomputer. Image Credit: MPIA (G. Stinson / A.V. Maccio)However, IRAS 08 is a complex object that’s also interacting with a nearby galaxy. “VLA observations of the HI gas around IRAS08 identified a filament extending out to ~ 40 kpcs from the galaxy and containing 70% of the neutral gas in the system,” the authors write. This filament interacts with a neighbouring galaxy about 60 kpcs away, which is only one-tenth the mass of IRAS-08.
The authors say that this interaction with its neighbour could enhance star formation, but there’s no evidence that it’s affecting IRAS-08’s morphology. This doesn’t appear to be the first stage of an eventual merger.
Finding the boundary between the CGM and the IGM could be a critical step in understanding how gas cycles in and out of galaxies and how gas may interact with neighbours without a merger.
“The circumgalactic medium plays a huge role in that cycling of that gas,” says Dr Nielsen. “So, being able to understand what the CGM looks like around galaxies of different types – ones that are star-forming, those that are no longer star-forming, and those that are transitioning between the two –we can observe differences in this gas, which might drive the differences within the galaxies themselves, and changes in this reservoir may actually be driving the changes in the galaxy itself.”
Nature has few discrete boundaries. Everything interacts with other things, including massive galaxies. The interactions hold the key to understanding.
These results could open up a whole new window into how galaxies, gas, and stars interact and how galaxies evolve.
The post The True Size of Galaxies is Much Larger Than We Thought appeared first on Universe Today.
Astronauts would have been fine on Boeing's Starliner during landing, NASA says
NASA Astronauts to Discuss Mission from Space Station
Media are invited to hear from NASA astronauts Butch Wilmore and Suni Williams during an Earth to space call at 2:15 p.m. EDT, Friday, Sept. 13. The pair will participate in a news conference aboard the International Space Station in low Earth orbit.
Coverage of the event will stream on NASA+, the NASA app, and the agency’s website. Learn how to stream NASA content through a variety of platforms, including social media.
Media interested in participating must contact the newsroom at NASA’s Johnson Space Center in Houston no later than 5 p.m., Thursday, Sept. 12, at 281-483-5111 or jsccommu@mail.nasa.gov. To ask questions, media must dial into the news conference no later than 10 minutes prior to the start of the call. A copy of NASA’s media accreditation policy is online.
NASA astronauts Butch Wilmore and Suni Williams launched aboard Boeing’s Starliner spacecraft on June 5 for its first crewed flight, arriving at the space station on June 6. Following the agency’s decision to return Starliner uncrewed, the duo will remain on the space station as part of the Expedition 71/72 crew and return home in February 2025 aboard the SpaceX Dragon spacecraft with two other crew members on NASA’s SpaceX Crew-9 mission.
For more information about space station research and operations, visit:
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Josh Finch / Claire O’Shea
Headquarters, Washington
202-358-1100
joshua.a.finch@nasa.gov / claire.a.o’shea@nasa.gov
Courtney Beasley
Johnson Space Center, Houston
281-483-5111
courtney.m.beasley@nasa.gov
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Using A Space Elevator To Get Resources Off the Queen of the Asteroid Belt
Here at UT, we’ve had several stories that describe the concept of a space elevator. They are designed to make it easier to get objects off Earth and into space. That, so far, has proven technically or economically infeasible, as no material is strong enough to support the structure passively, and it’s too energy-intensive to support it actively. However, it could be more viable on other worlds, such as the Moon. But what about worlds farther afield? A student team from the University of Colorado at Colorado Springs looked at the use case of a space elevator on Ceres and found that it could be done with existing technology.
Before we discuss why anyone would want to put a space elevator on Ceres, let’s first examine the technologies that would make it possible. Every space elevator design has three different components: an anchor, a tether, and a counterweight. Each would require its own technologies.
The anchor is simple enough; it’s how the system interfaces with Ceres. The surface of Ceres is primarily made of clay, which is relatively good for anchoring technologies. Luckily, the force the anchor needs to withstand is only around 300N, which is much lower than the force on Earth, given Ceres’ small mass. There have already been asteroid anchoring technologies for other missions that can provide up to 500N of force resistance, so an anchor on Ceres should prove no real challenge.
Fraser describes the general idea of a space elevator.The tether is where the technology falls short on Earth – no material known to science can withstand the forces exerted on the tether of a passively controlled space elevator when it is tied to Earth. However, the closest we can come, something space elevator enthusiasts mention as almost a holy grail, is carbon nanotubes. In the analysis for the space elevator on Ceres, they once again came out ahead. However, the limitation of actually physically creating a long tether will still plague any space elevator design on Ceres.
The counterweight is much simpler, as it can be just a big, dumb mass. However, its mass is proportional to the necessary length of cable—the heavier the mass, the shorter the cable. So, the tradeoff between having a heavier counterweight and a shorter cable is another design consideration when considering these systems.
Calculations from the team show that, with only a little more technological development, all three main systems could be ready for installation on Ceres itself. But what advantages does it have? It could be helpful as a launching point for accessing other asteroids in the asteroid belt. Ceres also has water relatively near the surface, which is helpful for all kinds of human exploration, either as rocket fuel or biological systems. It’s also well placed to quickly get things back to Earth using Jupiter as a gravity assist.
Isaac Arthur goes into a deeper description of space elevators and their advantages.But before it can provide any of those advantages, someone is going to have to pay for it. Estimates of the overall cost of the system total about $5.2 billion — not too far out of the range of larger-scale space exploration projects. But more than most countries are likely willing to pony up for a grand infrastructure project that hasn’t yet proven its benefit.
So, for now, any space elevator will remain in the realm of science fiction. But research like this and other ongoing technological improvements is how we will eventually push forward to that future. Whether it’s a space elevator on Ceres, on the Moon, or some other novel launch technology, someday humans will need a better way to get off Earth rather than burning dead living organisms. Hopefully, that day will come sooner rather than later.
Learn More:
Bate et al. – Analyzing the Potential of Space Elevator Technology for Sustainable Asteroid Mining
UT – What is a Space Elevator?
UT – A New Method for Making Graphene has an Awesome Application: A Space Elevator!
UT – A Japanese Company is About to Test a Tiny Space Elevator… in Space
Lead Image:
Artistic view of a possible space elevator.
Credit: NASA
The post Using A Space Elevator To Get Resources Off the Queen of the Asteroid Belt appeared first on Universe Today.
NASA Ames Fire Department to Conduct Live Aircraft Fire Training
The NASA Ames Fire Department will conduct emergency response fire training on the west ramp of the Moffett Federal Airfield between 8 a.m. and 8 p.m. PDT Tuesday, Sept. 10 through Saturday, Sept. 14. The media and the public are advised that sirens may be audible and smoke plumes and flames may be visible from U.S. Highway 101 during this time. However, officials generally expect little to no smoke.
The session will include a live burn created by a propane-fueled aircraft fire simulator at the field. The drill is intended to prepare Ames fire responders and Ames Emergency Operations Center staff for real-life fire emergencies.
For more information about NASA’s Ames Research Center, visit:
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Rachel Hoover
Ames Research Center, Silicon Valley
650-604-4789
rachel.hoover@nasa.gov
