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6 Min Read NASA’s PUNCH Mission to Revolutionize Our View of Solar Wind
Earth is immersed in material streaming from the Sun. This stream, called the solar wind, is washing over our planet, causing breathtaking auroras, impacting satellites and astronauts in space, and even affecting ground-based infrastructure.
NASA’s PUNCH (Polarimeter to Unify the Corona and Heliosphere) mission will be the first to image the Sun’s corona, or outer atmosphere, and solar wind together to better understand the Sun, solar wind, and Earth as a single connected system.
Launching no earlier than Feb. 28, 2025, aboard a SpaceX Falcon 9 rocket from Vandenberg Space Force Base in California, PUNCH will provide scientists with new information about how potentially disruptive solar events form and evolve. This could lead to more accurate predictions about the arrival of space weather events at Earth and impact on humanity’s robotic explorers in space.
“What we hope PUNCH will bring to humanity is the ability to really see, for the first time, where we live inside the solar wind itself,” said Craig DeForest, principal investigator for PUNCH at Southwest Research Institute’s Solar System Science and Exploration Division in Boulder, Colorado.
This video can be freely shared and downloaded at https://svs.gsfc.nasa.gov/14773.
Video credit: NASA’s Goddard Space Flight Center Seeing Solar Wind in 3D
The PUNCH mission’s four suitcase-sized satellites have overlapping fields of view that combine to cover a larger swath of sky than any previous mission focused on the corona and solar wind. The satellites will spread out in low Earth orbit to construct a global view of the solar corona and its transition to the solar wind. They will also track solar storms like coronal mass ejections (CMEs). Their Sun-synchronous orbit will enable them to see the Sun 24/7, with their view only occasionally blocked by Earth.
Typical camera images are two dimensional, compressing the 3D subject into a flat plane and losing information. But PUNCH takes advantage of a property of light called polarization to reconstruct its images in 3D. As the Sun’s light bounces off material in the corona and solar wind, it becomes polarized — meaning the light waves oscillate in a particular way that can be filtered, much like how polarized sunglasses filter out glare off of water or metal. Each PUNCH spacecraft is equipped with a polarimeter that uses three distinct polarizing filters to capture information about the direction that material is moving that would be lost in typical images.
“This new perspective will allow scientists to discern the exact trajectory and speed of coronal mass ejections as they move through the inner solar system,” said DeForest. “This improves on current instruments in two ways: with three-dimensional imaging that lets us locate and track CMEs which are coming directly toward us; and with a broad field of view, which lets us track those CMEs all the way from the Sun to Earth.”
All four spacecraft are synchronized to serve as a single “virtual instrument” that spans the whole PUNCH constellation.
Crews conduct additional solar array deployment testing for NASA’s PUNCH (Polarimeter to Unify the Corona and Heliosphere) satellites at Astrotech Space Operations located on Vandenberg Space Force Base in California on Wednesday, Jan. 22, 2025. USSF 30th Space Wing/Alex Valdez The PUNCH satellites include one Narrow Field Imager and three Wide Field Imagers. The Narrow Field Imager (NFI) is a coronagraph, which blocks out the bright light from the Sun to better see details in the Sun’s corona, recreating what viewers on Earth see during a total solar eclipse when the Moon blocks the face of the Sun — a narrower view that sees the solar wind closer to the Sun. The Wide Field Imagers (WFI) are heliospheric imagers that view the very faint, outermost portion of the solar corona and the solar wind itself — giving a wide view of the solar wind as it spreads out into the solar system.
“I’m most excited to see the ‘inbetweeny’ activity in the solar wind,” said Nicholeen Viall, PUNCH mission scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “This means not just the biggest structures, like CMEs, or the smallest interactions, but all the different types of solar wind structures that fill that in between area.”
When these solar wind structures from the Sun reach Earth’s magnetic field, they can drive dynamics that affect Earth’s radiation belts. To launch spacecraft through these belts, including ones that will carry astronauts to the Moon and beyond, scientists need to understand the solar wind structure and changes in this region.
Building Off Other Missions
“The PUNCH mission is built on the shoulders of giants,” said Madhulika Guhathakurta, PUNCH program scientist at NASA Headquarters in Washington. “For decades, heliophysics missions have provided us with glimpses of the Sun’s corona and the solar wind, each offering critical yet partial views of our dynamic star’s influence on the solar system.”
When scientists combine data from PUNCH and NASA’s Parker Solar Probe, which flies through the Sun’s corona, they will see both the big picture and the up-close details. Working together, Parker Solar Probe and PUNCH span a field of view from a little more than half a mile (1 kilometer) to over 160 million miles (about 260 million kilometers).
Additionally, the PUNCH team will combine their data with diverse observations from other missions, like NASA’s CODEX (Coronal Diagnostic Experiment) technology demonstration, which views the corona even closer to the surface of the Sun from its vantage point on the International Space Station. PUNCH’s data also complements observations from NASA’s EZIE (Electrojet Zeeman Imaging Explorer) — targeted for launch in March 2025 — which investigates the magnetic field perturbations associated with Earth’s high-altitude auroras that PUNCH will also spot in its wide-field view.
A conceptual animation showing the heliosphere, the vast bubble that is generated by the Sun’s magnetic field and envelops all the planets.
NASA’s Goddard Space Flight Center Conceptual Image Lab As the solar wind that PUNCH will observe travels away from the Sun and Earth, it will then be studied by the IMAP (Interstellar Mapping and Acceleration Probe) mission, which is targeting a launch in 2025.
“The PUNCH mission will bridge these perspectives, providing an unprecedented continuous view that connects the birthplace of the solar wind in the corona to its evolution across interplanetary space,” said Guhathakurta.
The PUNCH mission is scheduled to conduct science for at least two years, following a 90-day commissioning period after launch. The mission is launching as a rideshare with the agency’s next astrophysics observatory, SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer).
“PUNCH is the latest heliophysics addition to the NASA fleet that delivers groundbreaking science every second of every day,” said Joe Westlake, heliophysics division director at NASA Headquarters in Washington. “Launching this mission as a rideshare bolsters its value to the nation by optimizing every pound of launch capacity to maximize the scientific return for the cost of a single launch.”
The PUNCH mission is led by Southwest Research Institute’s offices in San Antonio, Texas, and Boulder, Colorado. The mission is managed by the Explorers Program Office at NASA Goddard for NASA’s Science Mission Directorate in Washington.
By Abbey Interrante
NASA’s Goddard Space Flight Center, Greenbelt, Md.
Header Image:
An artist’s concept showing the four PUNCH satellites orbiting Earth.
Credits: NASA’s Goddard Space Flight Center Conceptual Image Lab
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Last Updated Feb 21, 2025 Related Terms
Heliophysics Coronal Mass Ejections Goddard Space Flight Center Heliophysics Division Polarimeter to Unify the Corona and Heliosphere (PUNCH) Science Mission Directorate Solar Wind Space Weather The Sun Explore More
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Explore This SectionEarth Home Earth Observer Home Editor’s Corner Feature Articles Meeting Summaries NewsScience in the News Calendars In Memoriam MoreArchives 3 min read
In Memoriam: Jeff Dozier [1944–2024]
Jeff Dozier [1944–2024]Photo credit: Dozier’s family obituary Jeff Dozier, an environmental scientist, snow hydrologist, researcher, academic – and former Earth Observing System Project Scientist – died on November 17, 2024. Jeff’s research focused on snow hydrology and biogeochemistry in mountain environments and addressed the role of stored and melting snow in the hydrologic cycle as well as the economic and social impact on water resources. In these efforts, he embraced remote sensing with satellites to measure snow properties and energy balance. He was a Project Scientist with the Earth Observing System (EOS) Data and Information System, contributing to the design and management of very large information systems that would impact spatial modeling and environmental informatics.
Jeff served as the second EOS Project Scientist from 1990–1992. During that time, he worked with the NASA science community to – in his own words – “accomplish the goals of EOS, the most important of which is to develop the capability to predict or assess plausible environmental changes – both natural and human-induced – that will occur in the future. Meeting this challenge for the next decade to century requires the integration of knowledge from the traditional disciplines and information from many different sources into a coherent view of the Earth system. EOS is the largest project in the history of NASA and arguably the most important national and international scientific mission of the next two decades.”
Jeff’s work alongside Michael Matson, was featured in a 2019 NASA Earth Science news article: “NASA Tracks Wildfires From Above to Aid Firefighters Below.” While working at NOAA’s National Environmental Satellite, Data, and Information Service building in Camp Springs, MD, the pair detected methane fires in the Persian Gulf using the Advanced Very High Resolution Radiometer (AVHRR) instrument on the NOAA-6 satellite – marking the first time that such a small fire had been seen from space. Jeff went on to develop a mathematical method to distinguish small fires from other sources of heat, which become the foundation for nearly all subsequent satellite fire-detection algorithms.
At the time of his death, Jeff was Principal Investigator of a NASA-funded project with the objective of testing whether data from the Earth Surface Mineral Dust Source Investigation (EMIT) mission could be used to help refine the estimate for the snowpack melting rate. In the 2024 Earth Science news article, “NASA’s EMIT Will Explore Diverse Science Questions on Extended Mission,” Jeff indicated that EMIT’s ability to ‘see’ well into the infrared (IR) spectrum of light is key to his group’s efforts because ice is “pretty absorptive at near-IR and shortwave-IR wavelengths.” The results from this research will help inform water management decisions in states, such as California, where meltwater makes up the majority of the agricultural water supply.
Jeff earned a Bachelor’s of Science degree from California State University, Hayward (now California State University, East Bay) and a Master’s of Science degree and Ph.D. from the University of Michigan. He spent his career teaching at the University of California, Santa Barbara (UCSB), where he was named the founding Dean of the Bren School of Environmental Science and Management at UCSB in 1994. As the Dean, he recruited renowned faculty and developed one of the top environmental programs in the country. After his role as Dean, Jeff returned as a professor at Bren, educating the next generation of Earth scientists.
Jeff Dozier [1944–2024]Photo credit: Dozier’s family obituaryView the full article
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By NASA
Explore This SectionEarth Home Earth Observer Home Editor’s Corner Feature Articles Meeting Summaries NewsScience in the News Calendars In Memoriam MoreArchives 3 min read
In Memoriam: Berrien Moore III [1941–2024]
Berrien Moore III [1941–2024]Photo credit: Moore’s obituary on the University of Oklahoma’s (OU) website Berrien Moore III, Dean of the College of Atmospheric and Geographic Sciences at the University of Oklahoma (OU), director of the National Weather Center in Norman, OK, and Vice President for Weather and Climate Programs, died on December 17, 2024. Berrien earned an undergraduate degree from the University of North Carolina in 1963 and a doctorate degree from the University of Virginia in 1969. After graduating, he taught mathematics at the University of New Hampshire (UNH) and became tenured in 1976.
In 1987, Berrien became director of the Institute for the Study of Earth, Oceans, and Space (ISEOS) at UNH. NASA chose ISEOS to be one of the 24 founding members of the “Working Prototype Federation” of Earth Science Information Partners (ESIP) in 1998. Still active more than 25 years later, ESIP is now a thriving nonprofit entity funded by cooperative agreements with NASA, the National Oceanic and Atmospheric Administration (NOAA), and the U.S. Geological Survey, which brings together interdisciplinary collaborations (among over 170 partners) to share technical knowledge and engage with data users.
Berrien left UNH in 2008, to serve as the founding Executive Director of Climate Central, a think-tank based in Princeton, NJ, which is dedicated to providing objective and understandable information about climate change
Berrien moved to OU in 2010. Given his diverse academic, research, and career experience in global carbon cycle, biogeochemistry, remote sensing, environmental and space policy, and mathematics, Berrien was a natural choice to become the architect and principal investigator for the Geostationary Carbon Cycle Observatory (GeoCARB), a proposed NASA Earth Venture Mission that would have monitored plant health and vegetation stress throughout the Americas from geostationary orbit, probing natural sources, sinks, and exchange processes that control carbon dioxide, carbon monoxide, and methane in the atmosphere. While the mission was ultimately cancelled, the lessons learned are being applied to similar current and future Earth observing endeavors, e,g, NASA’s ECOsystem Spaceborne Thermal Radiometer Experiment on Space Station (ECOSTRESS) mission.
Berrien served on and chaired numerous government-affiliated scientific committees throughout his career. From 1995–1998 he served on the National Research Council’s Committee on Global Change Research, which produced the landmark report, “Global Environment Change: Research Pathways for the Next Decade.” In 2011, he was an author on the National Research Council’s (NRC) decadal survey, “Earth Science and Applications from Space: A Community Assessment and Strategies for the Future.”
Berrien participated on international scientific committees as well. From 1998–2002, he was the chair of the Science Committee of the International Geosphere Biosphere Programme (IGBP). He was also a lead author within the Intergovernmental Panel on Climate Change’s Third Assessment Report, which was released in 2001.
Berrien served in several roles specific to NASA, including as a committee member and later chair of the organization’s Space and Earth Science Advisory Committee. He served as Chair of the Earth Observing System (EOS) Payload Advisory Committee, member and Chair of NASA’s Earth Science and Applications Committee, and member of the NASA Advisory Council. He was also active at NOAA, having chaired the agency’s Research Review Team and served on the Research and Development Portfolio Review Team for NOAA’s Science Advisory Board.
Berrien received NASA’s highest civilian honor, the Distinguished Public Service Medal, for outstanding service and the NOAA Administrator’s Recognition Award. He also received the 2007 Dryden Lectureship in Research Medal from the American Institute of Aeronautics and Astronautics and was honored for his contributions to the IPCC when the organization received the 2007 Nobel Peace Prize.
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By NASA
Explore This Section Earth Home Earth Observer Home Editor’s Corner Feature Articles Meeting Summaries News Science in the News Calendars In Memoriam More Archives 3 min read
In Memoriam: Pierre Morel [1933–2024]
Pierre Morel [1933–2024] Photo Credit: Morel’s obituary on the Ecole Normale Supérieure website Pierre Morel, the first director of the World Climate Research Programme (WCRP) and founding member of WCRP’s Global Energy and Water Exchanges (GEWEX) Core project, died on December 10, 2024.
Pierre began his research as a theoretical physicist. His doctoral thesis examined the existence and properties of a condensed superfluid state of liquid Helium 3 at very low temperature. He lectured on basic physics, geophysical fluid dynamics, and climate science. As his career progressed, he focused his research on studying the circulation of the atmosphere. He was devoted to the development of numerical modelling of atmospheric flow that laid the groundwork for the study of climatology.
Pierre’s work played an integral role in the development of tools used to study the atmosphere, many of which are still active today. Examples include Project Éole – an experimental wind energy plant conceived in the 1980s and created in Quebec, Canada that closed down in 1993; the ARGOS satellite, a collaboration between the Centre National d’Études Spatiale (CNES) [French Space Agency], National Oceanic and Atmospheric Administration (NOAA), and NASA, to collect and relay meteorological and oceanographic data around the world that launched in 1978; the Search and Rescue Satellite Aided Tracking (SARSAT) system, which was developed by the U.S. – specifically NOAA, NASA, and the U.S. Coast Guard and Air Force – Canada, and France, with the first satellite launch in 1982; and the European Organization for the Exploitation of Meteorological Satellites’ METEOSAT series of geostationary satellites, which launched in 1977 and remain active today. The launch of Meteosat–12 in 2022 was the first METEOSAT Third Generation (MTG) launch.
Early in his career, Pierre was the director of the French Laboratoire de Météorologie Dynamique (LMD) before he became the director of the Centre National d’Études Spatiales (CNES). In 1980 he became the first chairman of the WCRP, where he steered a broad interdisciplinary research program in global climate and Earth system science that involved the participation of atmospheric, oceanic, hydrological, and polar scientists worldwide. Pierre was later in charge of planetary programs at NASA and was involved in discussions about the future of NASA’s Earth Observing System (EOS) in the mid-to-late 1990s. As an example, the Earth Observer article, “Minutes Of The Fourteenth Earth Science Enterprise/Earth Observing System (ESE/EOS) Investigators Working Group Meeting,” includes a summary of a presentation Pierre gave that focused on flight mission planning for the EOS “second series,” which was NASA’s plan at the time although ultimately not pursued, with the “first series” (i.e., Terra, Aqua, Aura) enduring much longer than anticipated.
Pierre was the recipient of the 2008 Alfred Wegener Medal & Honorary Membership for his outstanding contributions to geophysical fluid dynamics, his leadership in the development of climate research, and the applications of space observation to meteorology and the Earth system science.
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