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NASA’s Webb Investigates Eternal Sunrises, Sunsets on Distant World
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By NASA
With two months to go before flight, the Apollo 13 prime crew of James Lovell, Thomas Mattingly, Fred Haise, and backups John Young, John Swigert, and Charles Duke continued to train for the 10-day mission planned to land in the Fra Mauro highlands region of the Moon. Engineers continued to prepare the Saturn V rocket and spacecraft at the launch pad for the April 11, 1970, liftoff and completed the Flight Readiness Test of the vehicle. All six astronauts spent many hours in flight simulators training while the Moon walkers practiced landing the Lunar Module and rehearsed their planned Moon walks. The crew for the next Moon landing mission, Apollo 14, participated in a geology field trip as part of their training for the flight then planned for October 1970. Meanwhile, NASA released Apollo 12 lunar samples to scientists and the Apollo 12 crew set off on a Presidential world goodwill tour.
At NASA’s Kennedy Space Center in Florida, engineers completed the Flight Readiness Test of the Apollo 13 Saturn V on Feb. 26. The test ensured that all systems are flight ready and compatible with ground support equipment, and the astronauts simulated portions of the countdown and powered flight. Successful completion of the readiness test cleared the way for a countdown dress rehearsal at the end of March.
John Young prepares for a flight aboard the Lunar Landing Training Vehicle.NASA John Young after a training flight aboard the landing trainer. NASA Fred Haise prepares for a flight at the Lunar Landing Research Facility. NASA One of the greatest challenges astronauts faced during a lunar mission entailed completing a safe landing on the lunar surface. In addition to time spent in simulators, Apollo mission commanders and their backups trained for the final few hundred feet of the descent using the Lunar Landing Training Vehicle at Ellington Air Force Base near the Manned Spacecraft Center, now NASA’s Johnson Space Center, in Houston. Bell Aerosystems of Buffalo, New York, built the trainer for NASA to simulate the flying characteristics of the Lunar Module. Lovell and Young completed several flights in February 1970. Due to scheduling constraints with the trainer, lunar module pilots trained for their role in the landing using the Lunar Landing Research Facility at NASA’s Langley Research Center in Hampton, Virginia. Haise and Duke completed training sessions at the Langley facility in February.
Charles Duke practices Lunar Module egress during a KC-135 parabolic flight. NASA Charles Duke rehearses unstowing equipment from the Lunar Module during a KC-135 parabolic flight. NASA The astronauts trained for moonwalks with parabolic flights aboard NASA’s KC-135 aircraft that simulated the low lunar gravity, practicing their ladder descent to the surface. On the ground, they rehearsed the moonwalks, setting up the American flag and the large S-band communications antenna, and collecting lunar samples. Engineers improved their spacesuits to make the expected longer spacewalks more comfortable for the crew members by installing eight-ounce bags of water inside the helmets for hydration.
James Lovell, left, and Fred Haise practice setting up science equipment, the American flag, and the S-band antenna.NASA Lovell, left, and Haise practice collecting rock samples. NASA John Young, left, and Charles Duke train to collect rock samples. NASA Fred Haise, left, and James Lovell practice lowering the Apollo Lunar Surface Experiment Package from the Lunar Module.NASA Lovell, left, and Haise practice setting up the experiments. NASA Lovell, left, and Haise practice drilling for the Heat Flow Experiment. NASA During their 35 hours on the Moon’s surface, Lovell and Haise planned to conduct two four-hour spacewalks to set up the Apollo Lunar Surface Experiment Package (ALSEP), a suite of four investigations designed to collect data about the lunar environment after the astronauts’ departure, and to conduct geologic explorations of the landing site. The four experiments included the:
Charged Particle Lunar Environment Experiment designed to measure the flexes of charged particles Cold Cathode Gauge Experiment designed to measure the pressure of the lunar atmosphere Heat Flow Experiment designed to make thermal measurements of the lunar subsurface Passive Seismic Experiment designed to measure any moonquakes, either naturally occurring or caused by artificial means As an additional investigation, the astronauts planned to deploy and retrieve the Solar Wind Composition experiment, a sheet of aluminum foil to collect particles from the solar wind for analysis by scientists back on Earth after about 20 hours of exposure on the lunar surface.
Apollo 14 astronauts Eugene Cernan, left, Joe Engle, Edgar Mitchell, and Alan Shepard with geologist Richard Jahns in the Pinacates Mountains of northern Mexico. NASA Shepard, left, Engle, Mitchell, and Cernan training with the Modular Equipment Transporter, accompanied by geologist Jahns. NASA With one lunar mission just two months away, NASA continued preparations for the following flight, Apollo 14, then scheduled for October 1970 with a landing targeted for the Littrow region of the Moon, an area scientists believed to be of volcanic origin. Apollo 14 astronauts Alan Shepard, Stuart Roosa, and Edgar Mitchell and their backups Eugene Cernan, Ronald Evans, and Joe Engle learned spacecraft systems in the simulators. Accompanied by a team of geologists led by Richard Jahns, Shepard, Mitchell, Cernan, and Engle participated in a geology expedition to the Pinacate Mountain Range in northern Mexico Feb. 14-18, 1970. The astronauts practiced using the Modular Equipment Transporter, a two-wheeled conveyance to transport tools and samples on the lunar surface.
Mail out of the Apollo 12 lunar samples. Apollo 12 astronauts Charles Conrad, left, Richard Gordon, and Alan Bean ride in a motorcade in Lima, Peru.NASA On Feb. 13, 1970, NASA began releasing Apollo 12 lunar samples to 139 U.S. and 54 international scientists in 16 countries, a total of 28.6 pounds of material. On Feb. 16, Apollo 12 astronauts Charles Conrad, Richard Gordon, and Alan Bean, accompanied by their wives and NASA and State Department officials, departed Houston’s Ellington Air Force Base for their 38-day Bullseye Presidential Goodwill World Tour. They first traveled to Latin America, making stops in Venezuela, Peru, Chile, and Panama before continuing on to Europe, Africa, and Asia.
The groundbreaking science and discoveries made during Apollo missions has pushed NASA to explore the Moon more than ever before through the Artemis program. Apollo astronauts set up mirror arrays, or “retroreflectors,” on the Moon to accurately reflect laser light beamed at them from Earth with minimal scattering or diffusion. Retroreflectors are mirrors that reflect the incoming light back in the same incoming direction. Calculating the time required for the beams to bounce back allowed scientists to precisely measure the Moon’s shape and distance from Earth, both of which are directly affected by Earth’s gravitational pull. More than 50 years later, on the cusp of NASA’s crewed Artemis missions to the Moon, lunar research still leverages data from those Apollo-era retroreflectors.
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10 min read 55 Years Ago: Apollo 13, Preparations for the Third Moon Landing
Article 2 months ago 23 min read 55 Years Ago: Apollo 12 Makes a Pinpoint Landing on the Moon
Article 3 months ago 9 min read 60 Years Ago: The First Flight of the Lunar Landing Research Vehicle
Article 4 months ago View the full article
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By NASA
5 Min Read Webb Maps Full Picture of How Phoenix Galaxy Cluster Forms Stars
Spectroscopic data collected from NASA’s James Webb Space Telescope is overlayed on an image of the Phoenix cluster that combines data from NASA’s Hubble Space Telescope, Chandra X-ray Observatory and the Very Large Array (VLA) radio telescope. Credits:
NASA, CXC, NRAO, ESA, M. McDonald (MIT), M. Reefe (MIT), J. Olmsted (STScI) Discovery proves decades-old theory of galaxy feeding cycle.
Researchers using NASA’s James Webb Space Telescope have finally solved the mystery of how a massive galaxy cluster is forming stars at such a high rate. The confirmation from Webb builds on more than a decade of studies using NASA’s Chandra X-ray Observatory and Hubble Space Telescope, as well as several ground-based observatories.
The Phoenix cluster, a grouping of galaxies bound together by gravity 5.8 billion light-years from Earth, has been a target of interest for astronomers due to a few unique properties. In particular, ones that are surprising: a suspected extreme cooling of gas and a furious star formation rate despite a roughly 10 billion solar mass supermassive black hole at its core. In other observed galaxy clusters, the central supermassive black hole powers energetic particles and radiation that prevents gas from cooling enough to form stars. Researchers have been studying gas flows within this cluster to try to understand how it is driving such extreme star formation.
Image A: Phoenix Cluster (Hubble, Chandra, VLA Annotated)
Spectroscopic data collected from NASA’s James Webb Space Telescope is overlayed on an image of the Phoenix cluster that combines data from NASA’s Hubble Space Telescope, Chandra X-ray Observatory and the Very Large Array (VLA) radio telescope. Webb’s powerful sensitivity in the mid-infrared detected the cooling gas that leads to a furious rate of star formation in this massive galaxy cluster. Credit: NASA, CXC, NRAO, ESA, M. McDonald (MIT), M. Reefe (MIT), J. Olmsted (STScI) “We can compare our previous studies of the Phoenix cluster, which found differing cooling rates at different temperatures, to a ski slope,” said Michael McDonald of the Massachusetts Institute of Technology in Cambridge, principal investigator of the program. “The Phoenix cluster has the largest reservoir of hot, cooling gas of any galaxy cluster — analogous to having the busiest chair lift, bringing the most skiers to the top of the mountain. However, not all of those skiers were making it down the mountain, meaning not all the gas was cooling to low temperatures. If you had a ski slope where there were significantly more people getting off the ski lift at the top than were arriving at the bottom, that would be a problem!”
To date, in the Phoenix cluster, the numbers weren’t adding up, and researchers were missing a piece of the process. Webb has now found those proverbial skiers at the middle of the mountain, in that it has tracked and mapped the missing cooling gas that will ultimately feed star formation. Most importantly, this intermediary warm gas was found within cavities tracing the very hot gas, a searing 18 million degrees Fahrenheit, and the already cooled gas around 18,000 degrees Fahrenheit.
The team studied the cluster’s core in more detail than ever before with the Medium-Resolution Spectrometer on Webb’s Mid-Infrared Instrument (MIRI). This tool allows researchers to take two-dimenstional spectroscopic data from a region of the sky, during one set of observations.
“Previous studies only measured gas at the extreme cold and hot ends of the temperature distribution throughout the center of the cluster,” added McDonald. “We were limited — it was not possible to detect the ‘warm’ gas that we were looking for. With Webb, we could do this for the first time.”
Image B: Phoenix Cluster (Hubble, Chandra, VLA)
This image of the Phoenix cluster combines data from NASA’s Hubble Space Telescope, Chandra X-ray Observatory, and the Very Large Array radio telescope. X-rays from Chandra depict extremely hot gas in purple. Optical light data from Hubble show galaxies in yellow, and filaments of cooler gas where stars are forming in light blue. Outburst generated jets, represented in red, are seen in radio waves by the VLA radio telescope. NASA, CXC, NRAO, ESA, M. McDonald (MIT). A Quirk of Nature
Webb’s capability to detect this specific temperature of cooling gas, around 540,000 degrees Fahrenheit, is in part due to its instrumental capabilities. However, the researchers are getting a little help from nature, as well.
This oddity involves two very different ionized atoms, neon and oxygen, created in similar environments. At these temperatures, the emission from oxygen is 100 times brighter but is only visible in ultraviolet. Even though the neon is much fainter, it glows in the infrared, which allowed the researchers to take advantage of Webb’s advanced instruments.
“In the mid-infrared wavelengths detected by Webb, the neon VI signature was absolutely booming,” explained Michael Reefe, also of the Massachusetts Institute of Technology, lead author on the paper published in Nature. “Even though this emission is usually more difficult to detect, Webb’s sensitivity in the mid-infrared cuts through all of the noise.”
The team now hopes to employ this technique to study more typical galaxy clusters. While the Phoenix cluster is unique in many ways, this proof of concept is an important step towards learning about how other galaxy clusters form stars.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
NASA’s Goddard Space Flight Center, Greenbelt, Md.
Hannah Braun hbraun@stsci.edu
Space Telescope Science Institute, Baltimore, Md.
Christine Pulliam – cpulliam@stsci.edu
Space Telescope Science Institute, Baltimore, Md.
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By NASA
Ambiguity.
That’s the word that comes to mind when documentary photographers start each day at NASA’s Goddard Space Flight Center in Greenbelt, Maryland.
PACE mission photographer Denny Henry and lead documentary photographer Desiree Stover pose for selfies in the clean room.Credits: NASA “You walk in and think one thing is happening,” said OCI’s lead documentary photographer Desiree Stover. “But in an instant things change – maybe goes wrong –- and you need to be ready to capture it.”
From build to testing to launch, one figure is always present in the background capturing the story of each Goddard mission – the documentary photographer.
In honor of #WorldPhotoDay, follow along as two of our documentarians share what it’s like to capture the story of Goddard’s latest mission build PACE.
PACE or Plankton, Aerosol, Cloud, ocean Ecosystem, is set to launch in early 2024. Its goal is to see ocean and atmosphere features in unparalleled detail. By measuring the intensity of the color that reflects from Earth’s ocean surface, PACE will capture fine details about tiny plant-like organisms and algae that live in the ocean, called phytoplankton, that are the basis of the marine food web and generate half of Earth’s oxygen.
Crafting the Story
For Stover and her partner Denny Henry, PACE’s lead mission photographer, the story starts with the smallest details.
“I think one of the first things I photographed was the outside of a circuit port box. It was literally an empty metal box,” said Henry, who started photographing PACE in 2020, right before the pandemic. “It might be small, but it’s part of a system that’s going to do big things.”
Mark Walter, David Kim, Melyane Ortiz-acosta, and Ariel Obaldo discuss plans for testing the PACE flight Solar Array Panels.Credits: NASA’s Goddard Space Flight Center/Denny Henry A typical day for these photographers usually starts with a morning meeting, assignments and getting ready. By the end of the day, the original plan has likely been changed, multiple times.
“Some days we might shoot eight photos, other days it might be hundreds or more,” Stover said.
PACE, or Plankton, Aerosol, Cloud, ocean Ecosystem, is set to launch in early 2024. Its goal is to see ocean and atmosphere features in unparalleled detail.Credits: NASA Images captured during shoots are used for a variety of things, especially technical components of the mission. This includes documenting builds, spotting mistakes and testing.
Stover got her start at Goddard by photographing NASA’s James Webb Space Telescope before switching to capturing imagery of Goddard’s small instruments, including PACE’s Ocean Color Instrument, or OCI. This advanced sensor will enable continuous measurement of light throughout the ultraviolet to shortwave infrared spectrum to better understand Earth’s ocean and atmosphere.
She says she’s still in awe that her teammates trust her “eye.”
“One of the most fascinating things about working here is that we have a specific job,” she said. “And even though engineers can pick up a camera and take photos, they don’t. They know we’re the experts at it. They trust our eyes to tell and capture the story.”
Henry said one of the most memorable days he’s documented so far was watching the PACE team integrate the SPEXone instrument into the spacecraft.
“All the partners were there as I photographed. It was a big deal,” he said. “I captured every bolt all the way to the mounting. It’s important to get these details. Six months from now someone who wasn’t there might want to see what was done in what order.”
Henry said that capturing images is only part of the job. For every hour of shooting, there’s also an hour spent processing and working with partners to ensure things were documented correctly.
Playing Detective
While telling the story is important, Stover says that part of the job is speaking up, especially when you notice something wrong.
During one assignment documenting vibration testing, Stover noticed that OCI’s Earth shade looked different.
“We took the bagging off and could see tape peeling off the radiator panels, possibly loose wires in certain places,” she said. “When I saw this, I thought back to what it was like when we shot this the first time.”
Physical Science Technician Kristen Washington performs a contamination inspection of the OCI Flight Fold Flat Mirror optic.Credits: Desiree Stover, NASA Goddard It’s common for the photographers to shoot things twice to examine how things might change when in testing. When Stover saw the tape, she got to work ensuring her hunch was right.
She sent a series of images to the thermal team lead letting him know what she found. Plans were already underway to change the design.
The unexpected
Stover and Henry agree that documenting missions has come with some interesting experiences.
Both had to undergo fall protection harness training in the event they had to climb around one of Goddard’s cleanrooms, something that happened to Stover during one assignment.
“Once I was up in Building 29’s high bay. Like up at the very top in the crane rafters shooting. I never thought I was afraid of heights until that moment,” she said. “But I focused on the image and what task I was accomplishing and completed the assignment without issue.”
Henry said adjusting to Covid-19 required a lot of flexibility, especially with sudden changes.
“This is not a job you can do from home,” he said. “After a few months, we adapted.”
Radio Frequency testing of the PACE Earth Coverage Antenna in the Electromagnetic Anechoic Chamber at Goddard Space Flight Center.Credits: NASA’s Goddard Space Flight Center/Denny Henry Henry said that many times mission teams will find that engineering drawings won’t match up with what was actually built. With the pandemic restrictions, PACE heavily relied on his images to note how things changed and why issues occurred.
As PACE heads toward big milestones in the next year, both Stover and Henry are excited to see their work come together, including the day of launch.
They both agreed that photographing the teams involved in each aspect of PACE’s build is especially rewarding as they help create mementos that go along with their mission’s story.
By: Sara Blumberg
NASA’s Goddard Space Flight Center, Greenbelt, Md.
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By NASA
Explore Hubble 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 Online Activities Lithographs Fact Sheets Posters Hubble on the NASA App Glossary More 35th Anniversary Online Activities 5 Min Read Straight Shot: Hubble Investigates Galaxy with Nine Rings
LEDA 1313424, aptly nicknamed the Bullseye, is two and a half times the size of our Milky Way and has nine rings — six more than any other known galaxy. Credits:
NASA, ESA, Imad Pasha (Yale), Pieter van Dokkum (Yale) NASA’s Hubble Space Telescope has captured a cosmic bullseye! The gargantuan galaxy LEDA 1313424 is rippling with nine star-filled rings after an “arrow” — a far smaller blue dwarf galaxy — shot through its heart. Astronomers using Hubble identified eight visible rings, more than previously detected by any telescope in any galaxy, and confirmed a ninth using data from the W. M. Keck Observatory in Hawaii. Previous observations of other galaxies show a maximum of two or three rings.
“This was a serendipitous discovery,” said Imad Pasha, the lead researcher and a doctoral student at Yale University in New Haven, Connecticut. “I was looking at a ground-based imaging survey and when I saw a galaxy with several clear rings, I was immediately drawn to it. I had to stop to investigate it.” The team later nicknamed the galaxy the “Bullseye.”
LEDA 1313424, aptly nicknamed the Bullseye, is two and a half times the size of our Milky Way and has nine rings — six more than any other known galaxy. High-resolution imagery from NASA’s Hubble Space Telescope confirmed eight rings, and data from the W. M. Keck Observatory in Hawaii confirmed a ninth. Hubble and Keck also confirmed which galaxy dove through the Bullseye, creating these rings: the blue dwarf galaxy that sits to its immediate center-left. NASA, ESA, Imad Pasha (Yale), Pieter van Dokkum (Yale)
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Hubble and Keck’s follow-up observations also helped the researchers prove which galaxy plunged through the center of the Bullseye — a blue dwarf galaxy to its center-left. This relatively tiny interloper traveled like a dart through the core of the Bullseye about 50 million years ago, leaving rings in its wake like ripples in a pond. A thin trail of gas now links the pair, though they are currently separated by 130,000 light-years.
“We’re catching the Bullseye at a very special moment in time,” said Pieter G. van Dokkum, a co-author of the new study and a professor at Yale. “There’s a very narrow window after the impact when a galaxy like this would have so many rings.”
Galaxies collide or barely miss one another quite frequently on cosmic timescales, but it is extremely rare for one galaxy to dive through the center of another. The blue dwarf galaxy’s straight trajectory through the Bullseye later caused material to move both inward and outward in waves, setting off new regions of star formation.
How big is the Bullseye? Our Milky Way galaxy is about 100,000 light-years in diameter, and the Bullseye is almost two-and-a-half times larger, at 250,000 light-years across.
This illustration compares the size of our own Milky Way galaxy to gargantuan galaxy LEDA 1313424, nicknamed the Bullseye. The Milky Way is about 100,000 light-years in diameter, and the Bullseye is almost two-and-a-half times larger, at 250,000 light-years across. NASA, ESA, Ralf Crawford (STScI)
Download this Artist Concept (1 MB)
The researchers used Hubble’s crisp vision to carefully to pinpoint the location of most of its rings, since many are piled up at the center. “This would have been impossible without Hubble,” Pasha said.
They used Keck to confirm one more ring. The team suspects a 10th ring also existed, but has faded and is no longer detectable. They estimate it might lie three times farther out than the widest ring in Hubble’s image.
A One-to-One Match with Predictions
Pasha also found a stunning connection between the Bullseye and a long-established theory: The galaxy’s rings appear to have moved outward almost exactly as predicted by models.
“That theory was developed for the day that someone saw so many rings,” van Dokkum said. “It is immensely gratifying to confirm this long-standing prediction with the Bullseye galaxy.”
If viewed from above, it would be more obvious that the galaxy’s rings aren’t evenly spaced like those on a dart board. Hubble’s image shows the galaxy from a slight angle. “If we were to look down at the galaxy directly, the rings would look circular, with rings bunched up at the center and gradually becoming more spaced out the farther out they are,” Pasha explained.
To visualize how these rings may have formed, think about dropping a pebble into a pond. The first ring ripples out, becoming the widest over time, while others continue to form after it.
The researchers suspect that the first two rings in the Bullseye formed quickly and spread out in wider circles. The formation of additional rings may have been slightly staggered, since the blue dwarf galaxy’s flythrough affected the first rings more significantly.
This illustration shows the massive galaxy nicknamed the Bullseye face-on. Dotted circles indicate where each of its rings are, which formed like ripples in a pond after a blue dwarf galaxy (not shown) shot through its core about 50 million years ago. NASA’s Hubble Space Telescope helped researchers carefully pinpoint the location of most of its rings, many of which are piled up at the center. Data from the W. M. Keck Observatory in Hawaii helped the team confirm another ring. NASA, ESA, Ralf Crawford (STScI)
Download this Artist Concept (600 KB)
Individual stars’ orbits were largely undisturbed, though groups of stars did “pile up” to form distinguishable rings over millions of years. The gas, however, was carried outward, and mixed with dust to form new stars, further brightening the Bullseye’s rings.
There’s a lot more research to be done to figure out which stars existed before and after the blue dwarf’s “fly through.” Astronomers will now also be able to improve models showing how the galaxy may continue to evolve over billions of years, including the disappearance of additional rings.
Although this discovery was a chance finding, astronomers can look forward to finding more galaxies like this one soon. “Once NASA’s Nancy Grace Roman Space Telescope begins science operations, interesting objects will pop out much more easily,” van Dokkum explained. “We will learn how rare these spectacular events really are.”
The team’s paper was published on the February 4, 2025 in The Astrophysical Journal Letters.
The Hubble Space Telescope has been operating for over three decades and continues to make ground-breaking discoveries that shape our fundamental understanding of the universe. Hubble is a project of international cooperation between NASA and ESA (European Space Agency). NASA’s Goddard Space Flight Center in Greenbelt, Maryland, manages the telescope and mission operations. Lockheed Martin Space, based in Denver, also supports mission operations at Goddard. The Space Telescope Science Institute in Baltimore, which is operated by the Association of Universities for Research in Astronomy, conducts Hubble science operations for NASA.
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Claire Andreoli (claire.andreoli@nasa.gov)
NASA’s Goddard Space Flight Center, Greenbelt, MD
Claire Blome and Ray Villard
Space Telescope Science Institute, Baltimore, MD
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Last Updated Feb 04, 2025 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Related Terms
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By European Space Agency
This new NASA/ESA/CSA James Webb Space Telescope Picture of the Month presents HH 30 in unprecedented detail. This target is an edge-on protoplanetary disc that is surrounded by jets and a disc wind, and is located in the dark cloud LDN 1551 in the Taurus Molecular Cloud.
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