Space and Tech
NEOWISE, the NASA mission that cataloged objects around Earth for over a decade, has come to an end
Toshi Hirabayashi, Georgia Institute of Technology and Yaeji Kim, University of Maryland
The NASA project NEOWISE, which has given astronomers a detailed view of near-Earth objects – some of which could strike the Earth – ended its mission and burned on reentering the atmosphere after over a decade.
On a clear night, the sky is full of bright objects – from stars, large planets and galaxies to tiny asteroids flying near Earth. These asteroids are commonly known as near-Earth objects, and they come in a wide variety of sizes. Some are tens of kilometers across or larger, while others are only tens of meters or smaller.
On occasion, near-Earth objects smash into Earth at a high speed – roughly 10 miles per second (16 kilometers per second) or faster. That’s about 15 times as fast as a rifle’s muzzle speed. An impact at that speed can easily damage the planet’s surface and anything on it.
Impacts from large near-Earth objects are generally rare over a typical human lifetime. But they’re more frequent on a geological timescale of millions to billions of years. The best example may be a 6-mile-wide (10-kilometer-wide) asteroid that crashed into Earth, killed the dinosaurs and created Chicxulub crater about 65 million years ago.
Smaller impacts are very common on Earth, as there are more small near-Earth objects. An international community effort called planetary defense protects humans from these space intruders by cataloging and monitoring as many near-Earth objects as possible, including those closely approaching Earth. Researchers call the near-Earth objects that could collide with the surface potentially hazardous objects.
NASA began its NEOWISE mission in December 2013. This mission’s primary focus was to use the space telescope from the Wide-field Infrared Survey Explorer to closely detect and characterize near-Earth objects such as asteroids and comets.
NEOWISE contributed to planetary defense efforts with its research to catalog near-Earth objects. Over the past decade, it helped planetary defenders like us and our colleagues study near-Earth objects.
Detecting near-Earth objects
NEOWISE was a game-changing mission, as it revolutionized how to survey near-Earth objects.
The NEOWISE mission continued to use the spacecraft from NASA’s WISE mission, which ran from late 2009 to 2011 and conducted an all-sky infrared survey to detect not only near-Earth objects but also distant objects such as galaxies.
The spacecraft orbited Earth from north to south, passing over the poles, and it was in a Sun-synchronous orbit, where it could see the Sun in the same direction over time. This position allowed it to scan all of the sky efficiently.
The spacecraft could survey astronomical and planetary objects by detecting the signatures they emitted in the mid-infrared range.
Humans’ eyes can sense visible light, which is electromagnetic radiation between 400 and 700 nanometers. When we look at stars in the sky with the naked eye, we see their visible light components.
However, mid-infrared light contains waves between 3 and 30 micrometers and is invisible to human eyes.
When heated, an object stores that heat as thermal energy. Unless the object is thermally insulated, it releases that energy continuously as electromagnetic energy, in the mid-infrared range.
This process, known as thermal emission, happens to near-Earth objects after the Sun heats them up. The smaller an asteroid, the fainter its thermal emission. The NEOWISE spacecraft could sense thermal emissions from near-Earth objects at a high level of sensitivity – meaning it could detect small asteroids.
But asteroids aren’t the only objects that emit heat. The spacecraft’s sensors could pick up heat emissions from other sources too – including the spacecraft itself.
To make sure heat from the spacecraft wasn’t hindering the search, the WISE/NEOWISE spacecraft was designed so that it could actively cool itself using then-state-of-the-art solid hydrogen cryogenic cooling systems.
Operation phases
Since the spacecraft’s equipment needed to be very sensitive to detect faraway objects for WISE, it used solid hydrogen, which is extremely cold, to cool itself down and avoid any noise that could mess with the instruments’ sensitivity. Eventually the coolant ran out, but not until WISE had successfully completed its science goals.
During the cryogenic phase when it was actively cooling itself, the spacecraft operated at a temperature of about -447 degrees Fahrenheit (-266 degrees Celsius), slightly higher than the universe’s temperature, which is about -454 degrees Fahrenheit (-270 degrees Celsius).
The cryogenic phase lasted from 2009 to 2011, until the spacecraft went into hibernation in 2011.
Following the hibernation period, NASA decided to reactivate the WISE spacecraft under the NEOWISE mission, with a more specialized focus on detecting near-Earth objects, which was still feasible even without the cryogenic cooling.
During this reactivation phase, the detectors didn’t need to be quite as sensitive, nor the spacecraft kept as cold as it was during the cryogenic cooling phase, since near-Earth objects are closer than WISE’s faraway targets.
The consequence of losing the active cooling was that two long-wave detectors out of the four on board became so hot that they could no longer function, limiting the craft’s capability.
Nevertheless, NEOWISE used its two operational detectors to continuously monitor both previously and newly detected near-Earth objects in detail.
NEOWISE’s legacy
As of February 2024, NEOWISE had taken more than 1.5 million infrared measurements of about 44,000 different objects in the solar system. These included about 1,600 discoveries of near-Earth objects. NEOWISE also provided detailed size estimates for more than 1,800 near-Earth objects.
Despite the mission’s contributions to science and planetary defense, it was decommissioned in August 2024. The spacecraft eventually started to fall toward Earth’s surface, until it reentered Earth’s atmosphere and burned up on Nov. 1, 2024.
NEOWISE’s contributions to hunting near-Earth objects gave scientists much deeper insights into the asteroids around Earth. It also gave scientists a better idea of what challenges they’ll need to overcome to detect faint objects.
So, did NEOWISE find all the near-Earth objects? The answer is no. Most scientists still believe that there are far more near-Earth objects out there that still need to be identified, particularly smaller ones.
To carry on NEOWISE’s legacy, NASA is planning a mission called NEO Surveyor. NEO Surveyor will be a next-generation space telescope that can study small near-Earth asteroids in more detail, mainly to contribute to NASA’s planetary defense efforts. It will identify hundreds of thousands of near-Earth objects that are as small as about 33 feet (10 meters) across. The spacecraft’s launch is scheduled for 2027.
Toshi Hirabayashi, Associate Professor of Aerospace Engineering, Georgia Institute of Technology and Yaeji Kim, Postdoctoral Associate in Astronomy, University of Maryland
This article is republished from The Conversation under a Creative Commons license. Read the original article.
The science section of our news blog STM Daily News provides readers with captivating and up-to-date information on the latest scientific discoveries, breakthroughs, and innovations across various fields. We offer engaging and accessible content, ensuring that readers with different levels of scientific knowledge can stay informed. Whether exploring advancements in medicine, astronomy, technology, or environmental sciences, our science section strives to illuminate the intriguing world of scientific exploration and its profound impact on our daily lives. From thought-provoking articles to informative interviews with experts in the field, STM Daily News Science offers a harmonious blend of factual reporting, analysis, and exploration, making it a go-to source for science enthusiasts and curious minds alike. https://stmdailynews.com/category/science/
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NASA’s SpaceX Crew-9 members pose together for a portrait inside the vestibule between the International Space Station and the SpaceX Dragon crew spacecraft. Clockwise from left, are NASA astronauts Butch Wilmore, Nick Hague, and Suni Williams, and Roscosmos cosmonaut Aleksandr Gorbunov.
NASA
NASA is set to offer live coverage of the much-anticipated return of its SpaceX Crew-9 mission from the International Space Station (ISS). The event will commence with preparations for the Dragon spacecraft’s hatch closure at 10:45 p.m. EDT on Monday, March 17.
In a proactive move, NASA and SpaceX convened on Sunday to evaluate the weather and splashdown conditions off Florida’s coast in preparation for the Crew-9 mission return. Thanks to favorable weather forecasts for Tuesday evening, March 18, mission managers are targeting an earlier return opportunity. This adjustment serves to allow the onboard crew ample time to complete their handover duties while also providing operational flexibility in anticipation of less favorable weather later in the week.
The Crew-9 mission features NASA astronauts Nick Hague, Suni Williams, and Butch Wilmore, along with Roscosmos cosmonaut Aleksandr Gorbunov. These skilled astronauts have been conducting a long-duration science expedition aboard the ISS and will bring back critical time-sensitive research to Earth.
As the launch nears, mission managers will continue to monitor weather conditions, which will play a pivotal role in the undocking process. Factors such as spacecraft readiness, recovery team preparedness, and sea states will all influence the timing and location of the splashdown. NASA and SpaceX will finalize and communicate the specific splashdown site as the Crew-9 return approaches.
For those interested in following along, you can watch the Crew-9 return activities live on NASA+. Additional viewing options, including various social media platforms, are also available. Schedule information can be found at NASA Live.
Here’s a timeline of the upcoming live coverage (all times EDT and subject to change):
Monday, March 17
- 10:45 p.m. – Hatch closing coverage begins on NASA+
Tuesday, March 18
- 12:45 a.m. – Undocking coverage begins on NASA+
- 1:05 a.m. – Undocking
Following the undocking coverage, there will be an audio-only feed. Assuming favorable weather conditions at the splashdown sites, continuous coverage will resume on NASA+ before the deorbit burn.
- 4:45 p.m. – Return coverage begins on NASA+
- 5:11 p.m. – Deorbit burn (approximate time)
- 5:57 p.m. – Splashdown (approximate time)
Following the splashdown, there will be a Return-to-Earth media conference at 7:30 p.m. on NASA+, featuring key participants, including:
- Joel Montalbano, Deputy Associate Administrator, NASA’s Space Operations Mission Directorate
- Steve Stich, Manager, NASA’s Commercial Crew Program
- Jeff Arend, Manager for Systems Engineering and Integration, NASA’s International Space Station Office
- Sarah Walker, Director, Dragon Mission Management, SpaceX
Mark your calendars and prepare to witness this exciting milestone in space exploration as NASA’s Crew-9 mission returns home!
Find full mission coverage, NASA’s commercial crew blog, and more information about the Crew-9 mission at:
https://www.nasa.gov/commercialcrew
The science section of our news blog STM Daily News provides readers with captivating and up-to-date information on the latest scientific discoveries, breakthroughs, and innovations across various fields. We offer engaging and accessible content, ensuring that readers with different levels of scientific knowledge can stay informed. Whether it’s exploring advancements in medicine, astronomy, technology, or environmental sciences, our science section strives to shed light on the intriguing world of scientific exploration and its profound impact on our daily lives. From thought-provoking articles to informative interviews with experts in the field, STM Daily News Science offers a harmonious blend of factual reporting, analysis, and exploration, making it a go-to source for science enthusiasts and curious minds alike. https://stmdailynews.com/category/science/
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Moon Landing
In a significant milestone for space exploration, Firefly Aerospace’s Blue Ghost Mission 1 made a successful landing on the Moon at 3:34 a.m. EST on Sunday. Positioned near the volcanic feature of Mons Latreille within Mare Crisium, a vast basin exceeding 300 miles in diameter, this event marks a pivotal moment in NASA’s initiatives concerning lunar exploration.
This successful moon landing represents the first delivery under NASA’s Commercial Lunar Payload Services (CLPS) initiative for Firefly Aerospace, and it adds another achievement to the Artemis campaign aimed at returning humans to the Moon. The Blue Ghost lander now rests upright and stable on the lunar surface, ready to begin its suite of scientific operations.
The Blue Ghost craft is carrying ten cutting-edge NASA science and technology instruments designed to perform a variety of functions over approximately one lunar day, which translates to about 14 Earth days. Acting Administrator Janet Petro highlighted the importance of this mission, stating, “This incredible achievement demonstrates how NASA and American companies are leading the way in space exploration for the benefit of all.” The lessons learned from this mission will enhance future safety protocols for scientific exploration on the Moon and beyond.
Following its launch from NASA’s Kennedy Space Center on January 15, the Blue Ghost traveled over 2.8 million miles. During this journey, it downlinked more than 27 gigabytes of data while conducting several critical science operations. One notable achievement included signal tracking from the Global Navigation Satellite System (GNSS) at a record distance of 246,000 miles, validating the potential for similar positioning systems to be used effectively on the Moon.
Nicky Fox, associate administrator for science at NASA Headquarters, emphasized the significance of this mission in laying the groundwork for future human presence on the Moon: “The science and technology we send to the Moon now helps prepare the way for future NASA exploration and long-term human presence to inspire the world for generations to come.”
The instruments aboard the Blue Ghost will perform a variety of tasks during their lunar surface operations, including testing advanced drilling technology, collecting regolith samples, and developing lunar dust mitigation strategies. The insights gained from these experiments will contribute to our understanding of how space weather and cosmic forces interact with Earth.
As operations continue, the team intends to capture stunning imagery of the lunar sunset and investigate the behaviors of lunar dust during dusk conditions—an occurrence previously documented by Apollo 17 astronaut Eugene Cernan. Following the lunar sunset, the lander will remain functional for several hours into the lunar night.
Firefly Aerospace’s CEO, Jason Kim, expressed gratitude to NASA for the partnership and outlined the significance of this mission. “Blue Ghost’s successful Moon landing has laid the groundwork for the future of commercial exploration across cislunar space,” he stated, adding, “We’re now looking forward to more than 14 days of surface operations to unlock even more science data that will have a substantial impact on future missions to the Moon and Mars.”
In total, five companies have been awarded 11 lunar deliveries under the CLPS initiative, propelling the lunar economy forward with over 50 instruments being sent to various lunar locations, including the lunar South Pole. With a cumulative maximum contract value of $2.6 billion through 2028, the CLPS initiative is set to revolutionize how we explore and utilize the Moon’s resources.
As we celebrate this monumental achievement, it is clear that the collaboration between NASA and companies like Firefly Aerospace is paving the way for a new era of exploration, promising exciting discoveries that will benefit our understanding of the cosmos and our own planet for generations to come.
Learn more about NASA’s CLPS initiative at:
The science section of our news blog STM Daily News provides readers with captivating and up-to-date information on the latest scientific discoveries, breakthroughs, and innovations across various fields. We offer engaging and accessible content, ensuring that readers with different levels of scientific knowledge can stay informed. Whether it’s exploring advancements in medicine, astronomy, technology, or environmental sciences, our science section strives to shed light on the intriguing world of scientific exploration and its profound impact on our daily lives. From thought-provoking articles to informative interviews with experts in the field, STM Daily News Science offers a harmonious blend of factual reporting, analysis, and exploration, making it a go-to source for science enthusiasts and curious minds alike. https://stmdailynews.com/category/science/
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Space and Tech
Blue Origin Announces Crew for New Shepard’s 31st Mission
Exciting news! Blue Origin announces its all-female crew for New Shepard’s NS-31 mission, featuring inspiring leaders like Katy Perry and Gayle King! 
Blue Origin has exciting news as it announces the six remarkable individuals selected to fly on the NS-31 mission, the 11th human flight of its New Shepard program. This mission, set to launch this spring, features an inspiring all-female crew comprised of Aisha Bowe, Amanda Nguyen, Gayle King, Katy Perry, Kerianne Flynn, and Lauren Sánchez. These extraordinary women aim not only to explore the wonders of space but also to empower and inspire future generations.
Meet the NS-31 Crew
Aisha Bowe
Aisha is a former NASA rocket scientist and a dedicated advocate for STEM education. As the CEO of STEMBoard, she leads an engineering firm that has made waves in the industry, being recognized twice on the Inc. 5000 list of America’s fastest-growing private companies. Additionally, she founded LINGO, an edtech company focused on providing tech skills to students worldwide. Inspired by her own journey from community college to space, Aisha hopes her experience will motivate young people, particularly in the Bahamas, to chase their dreams.
Amanda Nguyen
Amanda is a bioastronautics research scientist with an impressive academic background, having graduated from Harvard and conducted research at prominent institutions like MIT and NASA. She played a role in the last NASA shuttle mission and is renowned for her advocacy work for sexual violence survivors, earning her a Nobel Peace Prize nomination. As the first Vietnamese and Southeast Asian woman astronaut, Amanda’s flight symbolizes a powerful reconciliation between the United States and Vietnam, using science as a pathway to peace.
Gayle King
An award-winning journalist and co-host of CBS Mornings, Gayle King has a reputation for her heartfelt interviews and thought-provoking discussions. With a career built on compassion and insight, she embraces new challenges, including being part of Blue Origin’s first all-female flight team. Gayle looks forward to stepping outside her comfort zone and experiencing the thrill of space travel.
Katy Perry
As one of the best-selling female artists of all time, Katy Perry brings her star power to the NS-31 mission. Beyond her music career, she is a passionate advocate for various philanthropic causes, serving as a UNICEF Goodwill Ambassador. Through her Firework Foundation, Katy inspires underserved children to express themselves through the arts. Being part of this historic all-female crew fills her with pride, and she hopes her journey serves as a beacon of inspiration for her daughter and all aspiring dreamers.
Kerianne Flynn
After successful careers in fashion and human resources, Kerianne Flynn dedicated the last decade to community-building and storytelling through nonprofit work and film production. Her recent projects explore crucial social themes, including women in Hollywood and fair pay advocacy. With a lifelong passion for exploration and adventure, Kerianne aims to inspire her son, Dex, and a new generation of dreamers with her flight aboard New Shepard.
Lauren Sánchez
Lauren is an Emmy Award-winning journalist, bestselling author, and licensed helicopter pilot. As Vice Chair of the Bezos Earth Fund, she is committed to addressing pressing climate issues. In 2016, she founded Black Ops Aviation, the first female-owned aerial film and production company. Her children’s book, The Fly Who Flew to Space, became a New York Times bestseller. Lauren’s goal is to motivate the next generation of explorers to reach for the stars.
A Historic Mission
The NS-31 mission is a remarkable milestone for Blue Origin, being the first all-female flight crew since Valentina Tereshkova’s solo flight in 1963. This mission marks the 31st flight in New Shepard’s history, with the program having successfully flown 52 individuals above the Kármán line, the globally recognized boundary of space.
Read the press release: https://www.blueorigin.com/fr-FR/news/new-shepard-ns-31-mission
As anticipation builds for the upcoming launch, we celebrate these extraordinary women and their commitment to breaking barriers and inspiring future generations to follow their dreams. For those interested in flying on a future New Shepard mission, additional details can be found at BlueOrigin.com/New-Shepard/Fly.
Stay tuned for more updates as we approach this exciting launch!
Source: Blue Origin
The science section of our news blog STM Daily News provides readers with captivating and up-to-date information on the latest scientific discoveries, breakthroughs, and innovations across various fields. We offer engaging and accessible content, ensuring that readers with different levels of scientific knowledge can stay informed. Whether it’s exploring advancements in medicine, astronomy, technology, or environmental sciences, our science section strives to shed light on the intriguing world of scientific exploration and its profound impact on our daily lives. From thought-provoking articles to informative interviews with experts in the field, STM Daily News Science offers a harmonious blend of factual reporting, analysis, and exploration, making it a go-to source for science enthusiasts and curious minds alike. https://stmdailynews.com/category/science/
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