Members Can Post Anonymously On This Site
Las Vegas family claims to see aliens after something crashed in their backyard
-
Similar Topics
-
By NASA
2 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
During the 21st Century Community Learning Centers workshop, after-school educators learn to build the “Move It” student activity from NASA’s Build, Launch and Recover Student Activity Guide.Credit: Kristen Marlatt NASA and the U.S. Department of Education are teaming up to engage students in science, technology, engineering, and math (STEM) education during after-school hours. The interagency program strives to reach approximately 1,000 middle school students in more than 60 sites across 10 states to join the program, 21st Century Community Learning Centers (CCLC).
Members of NASA Glenn Research Center’s Office of STEM Engagement traveled to Lansing, Michigan, last month to participate in a two-day professional development training with local after-school educators and facilitators. The training focused on integrating real-world STEM challenges into the 21st CCLC programs.
After-school educators engage in a student activity from NASA’s Build, Launch, and Recover Student Activity Guide. In this challenge, students become engineers and NASA crawler operators while working in teams to design and build a rubber band-powered model of NASA’s crawler-transporter that can carry the most mass possible the farthest distance without failure. Credit: Kristen Marlatt “By engaging in NASA learning opportunities, students are challenged to use critical thinking and creativity to solve real-world challenges that scientists and engineers may face,” said Darlene Walker, NASA Glenn’s Office of STEM Engagement director. “Through the 21st CCLC program, NASA and the Department of Education aim to inspire the next generation of explorers and innovators through high-quality educational content that ignites curiosity and fosters a joy of learning for students across the country.”
NASA Glenn education specialists will continue to provide NASA-related content and academic projects for students, in-person staff training, program support, and opportunities for students to engage with NASA scientists and engineers.
For more information on NASA Glenn’s STEM Engagement, visit https://www.nasa.gov/glenn-stem/
Return to Newsletter Explore More
1 min read NASA Faces of Technology: Meet Lauren Best Ameen
Article 7 mins ago 1 min read NASA Glenn Helps Bring Joy to Children in Need
Article 8 mins ago 4 min read NASA Sets Sights on Mars Terrain with Revolutionary Tire Tech
Article 24 hours ago View the full article
-
By NASA
NASA’s Jet Propulsion Laboratory used radar data taken by ESA’s Sentinel-1A satellite before and after the 2015 eruption of the Calbuco volcano in Chile to create this inter-ferogram showing land deformation. The color bands west of the volcano indicate land sinking. NISAR will produce similar images.ESA/NASA/JPL-Caltech A SAR image — like ones NISAR will produce — shows land cover on Mount Okmok on Alaska’s Umnak Island . Created with data taken in August 2011 by NASA’s UAVSAR instrument, it is an example of polarimetry, which measures return waves’ orientation relative to that of transmitted signals.NASA/JPL-Caltech Data from NASA’s Magellan spacecraft, which launched in 1989, was used to create this image of Crater Isabella, a 108-mile-wide (175-kilometer-wide) impact crater on Venus’ surface. NISAR will use the same basic SAR principles to measure properties and characteristics of Earth’s solid surfaces.NASA/JPL-Caltech Set to launch within a few months, NISAR will use a technique called synthetic aperture radar to produce incredibly detailed maps of surface change on our planet.
When NASA and the Indian Space Research Organization’s (ISRO) new Earth satellite NISAR (NASA-ISRO Synthetic Aperture Radar) launches in coming months, it will capture images of Earth’s surface so detailed they will show how much small plots of land and ice are moving, down to fractions of an inch. Imaging nearly all of Earth’s solid surfaces twice every 12 days, it will see the flex of Earth’s crust before and after natural disasters such as earthquakes; it will monitor the motion of glaciers and ice sheets; and it will track ecosystem changes, including forest growth and deforestation.
The mission’s extraordinary capabilities come from the technique noted in its name: synthetic aperture radar, or SAR. Pioneered by NASA for use in space, SAR combines multiple measurements, taken as a radar flies overhead, to sharpen the scene below. It works like conventional radar, which uses microwaves to detect distant surfaces and objects, but steps up the data processing to reveal properties and characteristics at high resolution.
To get such detail without SAR, radar satellites would need antennas too enormous to launch, much less operate. At 39 feet (12 meters) wide when deployed, NISAR’s radar antenna reflector is as wide as a city bus is long. Yet it would have to be 12 miles (19 kilometers) in diameter for the mission’s L-band instrument, using traditional radar techniques, to image pixels of Earth down to 30 feet (10 meters) across.
Synthetic aperture radar “allows us to refine things very accurately,” said Charles Elachi, who led NASA spaceborne SAR missions before serving as director of NASA’s Jet Propulsion Laboratory in Southern California from 2001 to 2016. “The NISAR mission will open a whole new realm to learn about our planet as a dynamic system.”
Data from NASA’s Magellan spacecraft, which launched in 1989, was used to create this image of Crater Isabella, a 108-mile-wide (175-kilometer-wide) impact crater on Venus’ surface. NISAR will use the same basic SAR principles to measure properties and characteristics of Earth’s solid surfaces.NASA/JPL-Caltech How SAR Works
Elachi arrived at JPL in 1971 after graduating from Caltech, joining a group of engineers developing a radar to study Venus’ surface. Then, as now, radar’s allure was simple: It could collect measurements day and night and see through clouds. The team’s work led to the Magellan mission to Venus in 1989 and several NASA space shuttle radar missions.
An orbiting radar operates on the same principles as one tracking planes at an airport. The spaceborne antenna emits microwave pulses toward Earth. When the pulses hit something — a volcanic cone, for example — they scatter. The antenna receives those signals that echo back to the instrument, which measures their strength, change in frequency, how long they took to return, and if they bounced off of multiple surfaces, such as buildings.
This information can help detect the presence of an object or surface, its distance away, and its speed, but the resolution is too low to generate a clear picture. First conceived at Goodyear Aircraft Corp. in 1952, SAR addresses that issue.
“It’s a technique to create high-resolution images from a low-resolution system,” said Paul Rosen, NISAR’s project scientist at JPL.
As the radar travels, its antenna continuously transmits microwaves and receives echoes from the surface. Because the instrument is moving relative to Earth, there are slight changes in frequency in the return signals. Called the Doppler shift, it’s the same effect that causes a siren’s pitch to rise as a fire engine approaches then fall as it departs.
Computer processing of those signals is like a camera lens redirecting and focusing light to produce a sharp photograph. With SAR, the spacecraft’s path forms the “lens,” and the processing adjusts for the Doppler shifts, allowing the echoes to be aggregated into a single, focused image.
Using SAR
One type of SAR-based visualization is an interferogram, a composite of two images taken at separate times that reveals the differences by measuring the change in the delay of echoes. Though they may look like modern art to the untrained eye, the multicolor concentric bands of interferograms show how far land surfaces have moved: The closer the bands, the greater the motion. Seismologists use these visualizations to measure land deformation from earthquakes.
Another type of SAR analysis, called polarimetry, measures the vertical or horizontal orientation of return waves relative to that of transmitted signals. Waves bouncing off linear structures like buildings tend to return in the same orientation, while those bouncing off irregular features, like tree canopies, return in another orientation. By mapping the differences and the strength of the return signals, researchers can identify an area’s land cover, which is useful for studying deforestation and flooding.
Such analyses are examples of ways NISAR will help researchers better understand processes that affect billions of lives.
“This mission packs in a wide range of science toward a common goal of studying our changing planet and the impacts of natural hazards,” said Deepak Putrevu, co-lead of the ISRO science team at the Space Applications Centre in Ahmedabad, India.
Learn more about NISAR at:
https://nisar.jpl.nasa.gov
News Media Contacts
Andrew Wang / Jane J. Lee
Jet Propulsion Laboratory, Pasadena, Calif.
626-379-6874 / 818-354-0307
andrew.wang@jpl.nasa.gov / jane.j.lee@jpl.nasa.gov
2025-006
Share
Details
Last Updated Jan 21, 2025 Related Terms
NISAR (NASA-ISRO Synthetic Aperture Radar) Earth Earth Science Earth Science Division Jet Propulsion Laboratory Explore More
4 min read NASA Scientists, Engineers Receive Presidential Early Career Awards
Article 4 days ago 6 min read NASA International Space Apps Challenge Announces 2024 Global Winners
Article 5 days ago 3 min read NASA Scientists Find New Human-Caused Shifts in Global Water Cycle
Article 5 days ago Keep Exploring Discover More Topics From NASA
Missions
Humans in Space
Climate Change
Solar System
View the full article
-
By NASA
Hubble Space Telescope 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 Glossary Posters Hubble on the NASA App More 35th Anniversary 2 min read
Hubble Captures Young Stars Changing Their Environments
This NASA/ESA Hubble Space Telescope image features the nearest star-forming region to Earth, the Orion Nebula (Messier 42, M42), located some 1,500 light-years away. ESA/Hubble, NASA, and T. Megeath This NASA/ESA Hubble Space Telescope image peers into the dusty recesses of the nearest massive star-forming region to Earth, the Orion Nebula (Messier 42, M42). Just 1,500 light-years away, the Orion Nebula is visible to the unaided eye below the three stars that form the ‘belt’ in the constellation Orion. The nebula is home to hundreds of newborn stars including the subject of this image: the protostars HOPS 150 and HOPS 153.
These protostars get their names from the Herschel Orion Protostar Survey, conducted with ESA’s Herschel Space Observatory. The object visible in the upper-right corner of this image is HOPS 150: it’s a binary star system where two young protostars orbit each other. Each star has a small, dusty disk of material surrounding it. These stars gather material from their respective dust disks, growing in the process. The dark line that cuts across the bright glow of these protostars is a cloud of gas and dust falling in on the pair of protostars. It is over 2,000 times wider than the distance between Earth and the Sun. Based on the amount of infrared light HOPS 150 is emitting, as compared to other wavelengths it emits, the protostars are mid-way down the path to becoming mature stars.
Extending across the left side of the image is a narrow, colorful outflow called a jet. This jet comes from the nearby protostar HOPS 153, which is out of the frame. HOPS 153 is significantly younger than its neighbor. That stellar object is still deeply embedded in its birth nebula and enshrouded by a cloud of cold, dense gas. While Hubble cannot penetrate this gas to see the protostar, the jet HOPS 153 emitted is brightly and clearly visible as it plows into the surrounding gas and dust of the Orion Nebula.
The transition from tightly swaddled protostar to fully fledged star will dramatically affect HOPS 153’s surroundings. As gas falls onto the protostar, its jets spew material and energy into interstellar space, carving out bubbles and heating the gas. By stirring up and warming nearby gas, HOPS 153 may regulate the formation of new stars in its neighborhood and even slow its own growth.
Facebook logo @NASAHubble @NASAHubble Instagram logo @NASAHubble Explore More
Three-Year Study of Young Stars with NASA’s Hubble Enters New Chapter
NASA’s Hubble Finds Sizzling Details About Young Star FU Orionis
Bow Shock Near a Young Star
Media Contact:
Claire Andreoli (claire.andreoli@nasa.gov)
NASA’s Goddard Space Flight Center, Greenbelt, MD
Share
Details
Last Updated Jan 16, 2025 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Related Terms
Astrophysics Astrophysics Division Goddard Space Flight Center Hubble Space Telescope Nebulae Protostars Stars The Universe Keep Exploring Discover More Topics From Hubble
Hubble Space Telescope
Since its 1990 launch, the Hubble Space Telescope has changed our fundamental understanding of the universe.
Exploring the Birth of Stars
Hubble’s Night Sky Challenge
Hubble Focus: The Lives of Stars
This e-book highlights the mission’s recent discoveries and observations related to the birth, evolution, and death of stars.
View the full article
-
By NASA
Este mapa de la Tierra en 2024 muestra las anomalías de la temperatura global de la superficie, es decir, cuánto más caliente o más fría estuvo cada región del planeta en comparación con el promedio de 1951 a 1980. Las temperaturas normales se muestran en blanco, las superiores a las normales en rojo y naranja, y las inferiores a las normales en azul. Una versión animada de este mapa muestra la evolución de las anomalías de la temperatura global a lo largo del tiempo, desde 1880. Descarga esta visualización del Estudio de Visualización Científica del Centro Goddard de la NASA: https://svs.gsfc.nasa.gov/5450.Crédito: Estudio de Visualización Científica de la NASA Read this release in English here.
En el año 2024, la temperatura promedio de la superficie de la Tierra fue la más cálida que se haya registrado, según un análisis liderado por científicos de la NASA.
“Una vez más, se ha batido el récord de temperatura: 2024 fue el año más cálido desde que se empezaron a llevar registros en 1880”, dijo el administrador de la NASA, Bill Nelson. “Entre las temperaturas récord y los incendios forestales que amenazan actualmente nuestros centros y personal en California, nunca ha sido más importante entender nuestro planeta cambiante”.
Las temperaturas globales del 2024 estuvieron 2,30 grados Fahrenheit (1,28 grados Celsius) por encima del promedio para el período de referencia de la NASA (de 1951 a 1980), superando el récord establecido en 2023. El nuevo máximo histórico llega después de 15 meses consecutivos (junio de 2023 a agosto de 2024) de récords de temperaturas mensuales, una racha de calor sin precedentes.
Científicos de la NASA también estiman que en el 2024 la Tierra estuvo alrededor de 2,65 grados Fahrenheit (1,47 grados Celsius) más cálida que el promedio de mediados del siglo XIX (1850-1900). Durante más de la mitad del 2024, las temperaturas promedio superaron en 1,5 grados Celsius el nivel de referencia, y el promedio anual, con incertidumbres matemáticas, podría haber superado el nivel por primera vez.
“El Acuerdo de París sobre el cambio climático establece esfuerzos para mantenerse por debajo del nivel de 1,5 grados a largo plazo. Para poner eso en perspectiva, las temperaturas durante los períodos cálidos en la Tierra hace tres millones de años —cuando el nivel del mar era decenas de metros más alto que hoy— eran solo unos 3 grados Celsius más cálidos que los niveles preindustriales”, dijo Gavin Schmidt, director del Instituto Goddard de Investigaciones Espaciales (GISS, por sus siglas en inglés) de la NASA en Nueva York. “Estamos a medio camino de alcanzar niveles de calor del Plioceno en apenas 150 años”.
Los científicos han concluido que la tendencia al calentamiento de las últimas décadas está siendo impulsada por el dióxido de carbono, el metano y otros gases de efecto invernadero que atrapan el calor. Según un análisis internacional reciente, en 2022 y 2023 la Tierra registró un aumento récord de las emisiones de dióxido de carbono procedentes de combustibles fósiles. La concentración de dióxido de carbono en la atmósfera ha aumentado desde los niveles preindustriales en el siglo XVIII de aproximadamente 278 partes por millón a alrededor de 420 partes por millón en la actualidad.
La NASA y otras agencias federales recopilan regularmente datos sobre las concentraciones y emisiones de gases de efecto invernadero. Estos datos están disponibles en el Centro de Gases de Efecto Invernadero de Estados Unidos, una iniciativa de múltiples instituciones que consolida la información procedente de observaciones y modelos, con el fin de ofrecer a los responsables de la toma de decisiones un único punto de acceso a datos y análisis.
Tendencias de calor excepcional
Las temperaturas de cada año pueden verse influidas por fluctuaciones climáticas naturales como El Niño y La Niña, que alternativamente calientan y enfrían el océano Pacífico tropical. El fuerte fenómeno de El Niño que comenzó en el otoño boreal de 2023 contribuyó a que las temperaturas mundiales superaran los récords anteriores.
La ola de calor que comenzó en 2023 siguió superando las expectativas en 2024, según Schmidt, a pesar de que El Niño remitió. Los investigadores están trabajando en la identificación de los factores que contribuyen a este fenómeno, incluidos los posibles efectos climáticos de la erupción volcánica de Tonga de enero de 2022 y de las reducciones de la contaminación, que pueden cambiar la cubierta de nubes y la forma en que la energía solar se refleja hacia el espacio.
“No en todos los años se van a batir récords, pero la tendencia a largo plazo es clara”, dijo Schmidt. “Ya estamos viendo el impacto en las precipitaciones extremas, las olas de calor y el aumento del riesgo de inundaciones, que van a seguir empeorando mientras continúen las emisiones”.
Cambios a nivel local
La NASA elabora su registro de temperaturas a partir de los datos de temperatura del aire en superficie recolectados por decenas de miles de estaciones meteorológicas, así como de los datos de temperatura de la superficie del mar adquiridos por instrumentos en barcos y boyas. Para el análisis de estos datos, se emplean métodos que toman en consideración el espaciamiento variado de las estaciones de temperatura a nivel global y los efectos del calentamiento urbano que podrían sesgar los cálculos.
Una nueva evaluación publicada a principios de este año por científicos de la Escuela de Minas de Colorado, la Fundación Nacional para las Ciencias, la Administración Nacional Oceánica y Atmosférica (NOAA, por sus siglas en inglés) y la NASA provee aún más confianza en los datos de temperatura global y regional de la agencia.
“Cuando se producen cambios en el clima, primero se ven en la media mundial, luego se ven a nivel continental y después a nivel regional. Ahora lo estamos viendo a nivel local”, dijo Schmidt. “Los cambios que se están produciendo en las experiencias meteorológicas cotidianas de la gente se han hecho muy evidentes”.
Los análisis independientes de la NOAA, Berkeley Earth, el Centro Hadley (parte de la Oficina Meteorológica del Reino Unido, Met Office) y el Servicio de Cambio Climático de Copernicus en Europa también han concluido que las temperaturas de la superficie global para 2024 fueron las más altas desde que comenzaron los registros modernos. Estos científicos utilizan gran parte de los mismos datos de temperatura en sus análisis, pero emplean metodologías y modelos diferentes. Todos muestran la misma tendencia al calentamiento.
El conjunto completo de datos de la NASA sobre las temperaturas de la superficie global, así como los detalles (en inglés) de cómo los científicos de la NASA llevaron a cabo el análisis, están a disposición del público en GISS, un laboratorio de la NASA gestionado por el Centro de Vuelo Espacial Goddard de la agencia en Greenbelt, Maryland.
Para más información (en inglés) sobre los programas de ciencias de la Tierra de la NASA, visita:
https://www.nasa.gov/earth
-fin-
María José Viñas / Liz Vlock
Sede, Washington
240-458-0248 / 202-358-1600
maria-jose.vinasgarcia@nasa.gov / elizabeth.a.vlock@nasa.gov
Peter Jacobs
Centro de Vuelo Espacial Goddard, Greenbelt, MD.
301-286-0535
peter.jacobs@nasa.gov
View the full article
-
By European Space Agency
Video: 00:01:14 At the start of this new year, we look back at close-up pictures and solar flare data recorded by the ESA-led Solar Orbiter mission over the last three years. See and hear for yourself how the number of flares and their intensity increase, a clear sign of the Sun approaching the peak of the 11-year solar cycle.
This video combines ultraviolet images of the Sun's outer atmosphere (the corona, yellow) taken by Solar Orbiter's Extreme Ultraviolet Imager (EUI) instrument, with the size and locations of solar flares (blue circles) as recorded by the Spectrometer/Telescope for Imaging X-rays (STIX) instrument. The accompanying audio is a sonification based on the detected flares and the spacecraft's distance to the Sun.
Solar Orbiter moves on an elliptical path around the Sun, making a close approach to our star every six months. We can see this in the video from the spacecraft's perspective, with the Sun moving closer and farther over the course of each year. In the sonification, this is represented by the low background humming that loudens as the Sun gets closer and becomes quieter as it moves further away. (There are some abrupt shifts in distance visible in the video, as it skips over dates where one or both instruments were inactive or collecting a different type of data.)
The blue circles represent solar flares: bursts of high-energy radiation of which STIX detects the X-rays. Flares are sent out by the Sun when energy stored in 'twisted' magnetic fields (usually above sunspots) is suddenly released. The size of each circle indicates how strong the flare is, with stronger flares sending out more X-rays. We can hear the flares in the metallic clinks in the sonification, where the sharpness of the sound corresponds to how energetic the solar flare is.
Many thanks to Klaus Nielsen (DTU Space / Maple Pools) for making the sonification in this video. If you would like to hear more sonifications and music by this artist, please visit: https://linktr.ee/maplepools
Solar Orbiter is a space mission of international collaboration between ESA and NASA, operated by ESA.
View the full article
-
-
Check out these Videos
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.