Geyser Season on Mars

This Oct. 29, 2018, image from the HiRISE camera on NASA’s Mars Reconnaissance Orbiter captures geysers of gas and dust that occur in springtime in the South Polar region of Mars. As the Sun rises higher in the sky, the thick coating of carbon dioxide ice that accumulated over the winter begins to warm and then turn to vapor. Sunlight penetrates through the transparent ice and is absorbed at the base of the ice layer. The gas that forms because of the warming escapes through weaknesses in the ice and erupts in the form of geysers.

HiRISE, or the High Resolution Imaging Science Experiment, is a powerful camera that takes pictures covering vast areas of Martian terrain while being able to see features as small as a kitchen table.

Image credit: NASA/JPL-Caltech/University of Arizona

Powered by WPeMatico

Get The Details…
Monika Luabeya

Muestra de la NASA del asteroide Bennu revela un ‘caldo’ con los ingredientes de la vida

Read this release in English here.

Los estudios de las rocas y el polvo del asteroide Bennu que fueron traídos a la Tierra por la nave espacial de la misión Orígenes, Interpretación Espectral, Identificación de Recursos y Seguridad – Explorador de Regolito (OSIRIS-REx, por sus siglas en inglés) de la NASA han revelado moléculas que, en nuestro planeta, son clave para la vida, así como un historial de la existencia de agua salada que podría haber servido como “caldo” para que estos compuestos interactuaran y se combinaran.

Los hallazgos no muestran evidencia de vida, pero sí sugieren que las condiciones necesarias para el surgimiento de la vida estaban muy extendidas en todo el sistema solar primitivo, lo que aumentaría las probabilidades de que la vida pudiera haberse formado en otros planetas y lunas.

“La misión OSIRIS-REx de la NASA ya está reescribiendo los libros de texto sobre lo que entendemos acerca de los comienzos de nuestro sistema solar”, dijo Nicky Fox, administradora asociada en la Dirección de Misiones Científicas en la sede de la NASA en Washington. “Los asteroides proporcionan una cápsula del tiempo sobre la historia de nuestro planeta natal, y las muestras de Bennu son fundamentales para nuestra comprensión de qué ingredientes en nuestro sistema solar existían antes de que comenzara la vida en la Tierra”.

En artículos sobre esta investigación científica publicados el miércoles en las revistas Nature y Nature Astronomy, científicos de la NASA y otras instituciones compartieron los resultados de los primeros análisis en profundidad de los minerales y moléculas hallados en las muestras de Bennu, las cuales fueron transportadas a la Tierra por la nave espacial OSIRIS-REx en 2023.

Como se detalla en el artículo de Nature Astronomy, entre las detecciones más significativas se encontraron aminoácidos (14 de los 20 que la vida en la Tierra utiliza para producir proteínas) y las cinco nucleobases (bases nitrogenadas) que la vida en la Tierra utiliza para almacenar y transmitir instrucciones genéticas en moléculas biológicas terrestres más complejas como el ADN y el ARN, incluyendo la forma de organizar los aminoácidos para formar proteínas.

Los científicos también describieron abundancias excepcionalmente altas de amoníaco en las muestras de Bennu. El amoníaco es importante para la biología porque, en las condiciones adecuadas, puede reaccionar con el formaldehído, el cual también fue detectado en las muestras, para formar moléculas complejas como los aminoácidos. Cuando los aminoácidos se unen en cadenas largas, forman proteínas, las cuales impulsan casi todas las funciones biológicas.

Estos componentes básicos para la vida detectados en las muestras de Bennu han sido hallados antes en rocas extraterrestres. Sin embargo, identificarlos en una muestra impoluta obtenida en el espacio respalda la idea de que los objetos que se formaron lejos del Sol podrían haber sido una fuente importante de los ingredientes precursores básicos para la vida en todo el sistema solar.

“Las pistas que estamos buscando son muy minúsculas y se destruyen o alteran con mucha facilidad al exponerse al ambiente de la Tierra”, dijo Danny Glavin, científico principal de muestras en el Centro de Vuelo Espacial Goddard de la NASA en Greenbelt, Maryland, y coautor principal del artículo publicado en Nature Astronomy. “Es por eso que algunos de estos nuevos descubrimientos no serían posibles sin una misión de retorno que trajera las muestras, sin medidas meticulosas de control de la contaminación y sin una cuidadosa curaduría y almacenamiento de este precioso material proveniente de Bennu”.

Mientras que el equipo de Glavin analizó las muestras de Bennu en busca de indicios de compuestos relacionados con la vida, sus colegas, dirigidos por Tim McCoy, quien es curador de meteoritos en el Museo Nacional de Historia Natural del Instituto Smithsonian en Washington, y Sara Russell, mineralogista cósmica en el Museo de Historia Natural de Londres, buscaron pistas sobre el entorno en el que se habrían formado estas moléculas. En un informe publicado en la revista Nature, los científicos describen, además, la evidencia que hallaron de un antiguo entorno propicio para poner en marcha la química de la vida.

Desde calcita hasta halita y silvita, los científicos identificaron en la muestra de Bennu rastros de 11 minerales que se forman a medida que el agua que contiene las sales disueltas en ella se va evaporando a lo largo de extensos períodos de tiempo, dejando atrás las sales en forma de cristales sólidos.

Se han detectado o ha habido indicaciones de la existencia de salmueras similares en todo el sistema solar, incluso en el planeta enano Ceres y la luna Encélado de Saturno.

Aunque los científicos han detectado previamente varias evaporitas en meteoritos que caen a la superficie de la Tierra, nunca han visto un conjunto completo de sales sedimentadas que conservara un proceso de evaporación que podría haber durado miles de años o más. Algunos minerales presentes en Bennu, como la trona, fueron descubiertos por primera vez en muestras extraterrestres.

“Estos artículos científicos realmente se complementan para tratar de explicar cómo los ingredientes de la vida se unieron para hacer lo que vemos en este asteroide alterado acuosamente”, dijo McCoy.

A pesar de todas las respuestas que ha proporcionado la muestra de Bennu, quedan varias preguntas. Muchos aminoácidos se pueden producir en dos versiones de imagen especular, como un par de manos izquierda y derecha. La vida en la Tierra produce casi exclusivamente la variedad levógira (que va hacia la izquierda, o en sentido antihorario), pero las muestras de Bennu contienen una mezcla igual de ambas. Esto significa que, en la Tierra primitiva, los aminoácidos también podrían haber comenzado en una mezcla de iguales proporciones. La razón por la que la vida “giró hacia la izquierda” en lugar de hacia la derecha sigue siendo un misterio.

“OSIRIS-REx ha sido una misión muy exitosa”, dijo Jason Dworkin, científico que trabaja en el proyecto OSIRIS-REx desde el centro Goddard de NASA y es coautor principal del artículo de Nature Astronomy. “Los datos de OSIRIS-REx añaden grandes pinceladas a una imagen de un sistema solar rebosante de potencial para la vida. ¿Por qué nosotros, hasta ahora, solo vemos vida en la Tierra y no en otros lugares? Esa es la pregunta verdaderamente cautivante”.

El centro Goddard de la NASA proporcionó la gestión general de la misión, la ingeniería de sistemas y la garantía y seguridad de la misión OSIRIS-REx. Dante Lauretta, de la Universidad de Arizona en Tucson, es el investigador principal. Esa universidad dirige el equipo científico y la planificación y el procesamiento de datos de las observaciones científicas de la misión. Lockheed Martin Space en Littleton, Colorado, construyó la nave espacial y proporcionó las operaciones de vuelo. El centro Goddard y KinetX Aerospace fueron responsables de la navegación de la nave espacial OSIRIS-REx. La curaduría de OSIRIS-REx es llevada a cabo en el Centro Espacial Johnson de la NASA en Houston. Las asociaciones internacionales para esta misión incluyen el instrumento de altímetro láser de OSIRIS-REx proveniente de la CSA (Agencia Espacial Canadiense) y la colaboración científica para las muestras del asteroide con la misión Hayabusa2 de la JAXA (Agencia Japonesa de Exploración Aeroespacial). OSIRIS-REx es la tercera misión del Programa Nuevas Fronteras de la NASA, el cual es gestionado por el Centro de Vuelo Espacial Marshall de la agencia en Huntsville, Alabama, para la Dirección de Misiones Científicas de la agencia en Washington.

Para obtener más información sobre la misión OSIRIS-REx, visita el sitio web (en inglés):

https://www.nasa.gov/osiris-rex

-fin-

María José Viñas /Karen Fox / Molly Wasser
Headquarters, Washington
240-458-0248
maria-jose.vinasgarcia@nasa.gov / karen.c.fox@nasa.gov / molly.l.wasser@nasa.gov

Rani Gran
Centro de Vuelo Espacial Goddard, Greenbelt, Maryland
301-286-2483
rani.c.gran@nasa.gov

Powered by WPeMatico

Get The Details…
Jessica Taveau

NASA’s Asteroid Bennu Sample Reveals Mix of Life’s Ingredients

Lee esta nota de prensa en español aquí.

Studies of rock and dust from asteroid Bennu delivered to Earth by NASA’s OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification and Security–Regolith Explorer) spacecraft have revealed molecules that, on our planet, are key to life, as well as a history of saltwater that could have served as the “broth” for these compounds to interact and combine.

The findings do not show evidence for life itself, but they do suggest the conditions necessary for the emergence of life were widespread across the early solar system, increasing the odds life could have formed on other planets and moons.

“NASA’s OSIRIS-REx mission already is rewriting the textbook on what we understand about the beginnings of our solar system,” said Nicky Fox, associate administrator, Science Mission Directorate at NASA Headquarters in Washington. “Asteroids provide a time capsule into our home planet’s history, and Bennu’s samples are pivotal in our understanding of what ingredients in our solar system existed before life started on Earth.”

In research papers published Wednesday in the journals Nature and Nature Astronomy, scientists from NASA and other institutions shared results of the first in-depth analyses of the minerals and molecules in the Bennu samples, which OSIRIS-REx delivered to Earth in 2023.

Detailed in the Nature Astronomy paper, among the most compelling detections were amino acids – 14 of the 20 that life on Earth uses to make proteins – and all five nucleobases that life on Earth uses to store and transmit genetic instructions in more complex terrestrial biomolecules, such as DNA and RNA, including how to arrange amino acids into proteins.

Scientists also described exceptionally high abundances of ammonia in the Bennu samples. Ammonia is important to biology because it can react with formaldehyde, which also was detected in the samples, to form complex molecules, such as amino acids – given the right conditions. When amino acids link up into long chains, they make proteins, which go on to power nearly every biological function.

These building blocks for life detected in the Bennu samples have been found before in extraterrestrial rocks. However, identifying them in a pristine sample collected in space supports the idea that objects that formed far from the Sun could have been an important source of the raw precursor ingredients for life throughout the solar system.

“The clues we’re looking for are so minuscule and so easily destroyed or altered from exposure to Earth’s environment,” said Danny Glavin, a senior sample scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, and co-lead author of the Nature Astronomy paper. “That’s why some of these new discoveries would not be possible without a sample-return mission, meticulous contamination-control measures, and careful curation and storage of this precious material from Bennu.”

While Glavin’s team analyzed the Bennu samples for hints of life-related compounds, their colleagues, led by Tim McCoy, curator of meteorites at the Smithsonian’s National Museum of Natural History in Washington, and Sara Russell, cosmic mineralogist at the Natural History Museum in London, looked for clues to the environment these molecules would have formed. Reporting in the journal Nature, scientists further describe evidence of an ancient environment well-suited to kickstart the chemistry of life.

Ranging from calcite to halite and sylvite, scientists identified traces of 11 minerals in the Bennu sample that form as water containing dissolved salts evaporates over long periods of time, leaving behind the salts as solid crystals.

Similar brines have been detected or suggested across the solar system, including at the dwarf planet Ceres and Saturn’s moon Enceladus.

Although scientists have previously detected several evaporites in meteorites that fall to Earth’s surface, they have never seen a complete set that preserves an evaporation process that could have lasted thousands of years or more. Some minerals found in Bennu, such as trona, were discovered for the first time in extraterrestrial samples.

“These papers really go hand in hand in trying to explain how life’s ingredients actually came together to make what we see on this aqueously altered asteroid,” said McCoy.

For all the answers the Bennu sample has provided, several questions remain. Many amino acids can be created in two mirror-image versions, like a pair of left and right hands. Life on Earth almost exclusively produces the left-handed variety, but the Bennu samples contain an equal mixture of both. This means that on early Earth, amino acids may have started out in an equal mixture, as well. The reason life “turned left” instead of right remains a mystery.

“OSIRIS-REx has been a highly successful mission,” said Jason Dworkin, OSIRIS-REx project scientist at NASA Goddard and co-lead author on the Nature Astronomy paper. “Data from OSIRIS-REx adds major brushstrokes to a picture of a solar system teeming with the potential for life. Why we, so far, only see life on Earth and not elsewhere, that’s the truly tantalizing question.”

NASA Goddard provided overall mission management, systems engineering, and the safety and mission assurance for OSIRIS-REx. Dante Lauretta of the University of Arizona, Tucson, is the principal investigator. The university leads the science team and the mission’s science observation planning and data processing. Lockheed Martin Space in Littleton, Colorado, built the spacecraft and provided flight operations. NASA Goddard and KinetX Aerospace were responsible for navigating the OSIRIS-REx spacecraft. Curation for OSIRIS-REx takes place at NASA’s Johnson Space Center in Houston. International partnerships on this mission include the OSIRIS-REx Laser Altimeter instrument from CSA (Canadian Space Agency) and asteroid sample science collaboration with JAXA’s (Japan Aerospace Exploration Agency) Hayabusa2 mission. OSIRIS-REx is the third mission in NASA’s New Frontiers Program, managed by the agency’s Marshall Space Flight Center in Huntsville, Alabama, for the agency’s Science Mission Directorate in Washington.

For more information on the OSIRIS-REx mission, visit:

https://www.nasa.gov/osiris-rex

Karen Fox / Molly Wasser
Headquarters, Washington
202-358-1600
karen.c.fox@nasa.gov / molly.l.wasser@nasa.gov

Rani Gran
Goddard Space Flight Center, Greenbelt, Maryland
301-286-2483
rani.c.gran@nasa.gov

Powered by WPeMatico

Get The Details…
Jessica Taveau

Sols 4437-4438: Coordinating our Dance Moves

Earth planning date: Monday, Jan. 27, 2025

I was Geology and Mineralogy (Geo) Science Team lead today, and my day started with a bang and a drum roll — delivered by a rare winter thunderstorm (rare here in England, at least). I did lose power for a few minutes, but thanks to laptop batteries and phone Wi-Fi, I think no one noticed … so, shhh, don’t tell the boss!

Planning was especially interesting as we had a decision to make, whether we want to align ChemCam and APXS observations with each other and focus on one target, or whether we want two different targets. As Geo Science Team lead, it is my role to facilitate this discussion, but that is always fun — and easy. Many colleagues come with well-prepared reasons for why they want to have a certain observation in today’s plan, and I always learn something new about Mars, or geology, or both when those discussions happen. Weighing all arguments carefully, we decided for the coordinated dance of contact and remote science observations on a bedrock target we named “Desert View.” APXS will start the dance, followed by ChemCam active and one RMI image on the same location. Closing out the dance will be MAHLI, by imaging the APXS target that at this point will have the laser pits.

Such a coordinated observation will allow us to see how the rock reacts to the interaction with the laser. We have done this many times, and often learnt interesting things about the mineralogy of the rock. But more than 10 years ago, there was an even more ambitious coordination exercise: On sol 687 the imaging on a target called “Nova” was timed so that Mastcam actually captured the laser spark in the image. While that’s useful for engineering purposes, as a mineralogist I want to see the effect on the rock. Here is the result of that “spark” on target Nova on sol 687.

But back to today’s planning. Apart from the coordinated observations, ChemCam also adds to the Remote Micro Imager coverage of Gould Mesa with a vertical RMI observation that is designed to cover all the nice layers in the mesa, just like a stratigraphic column. Mastcam is looking back at the Rustic Canyon crater to get a new angle. Craters are three-dimensional and looking at it from all sides will help decipher the nature of this small crater, and also make full use of the window into the underground that it offers. Mastcam has two more mosaics, “Condor Peak” and “Boulder Basin,” which are both looking at interesting features in the landscape: Condor Peak at a newly visible butte, and Boulder Basin at bedrock targets in the near-field, to ascertain the structures and textures are still the same as they have been, or document any possible changes. Mars has surprised us before, so we try to look as often as power and other resources allow, even if only to confirm that nothing has changed. You can see the blocks that we are using for this observation in the grayscale Navigation Camera image above; we especially like it when upturned blocks give us a different view, while flat lying blocks in the same image show the “regular” perspective.

After the targeted science is completed, the rover will continue its drive along the planned route, to see what Mars has to offer on the next stop. After the drive, MARDI will take its image, and ChemCam do an autonomous observation, picking its own target. Also after the drive is a set of atmospheric observations to look at dust levels and search for dust devils. Continuous observations throughout include the DAN instrument’s observation of the surface and measurements of wind and temperature.

With that, the plan is again making best use of all the power we have available… and here in England the weather has improved, inside my power is back to normal, and outside it’s all back to the proverbial rain this small island is so famous for.

Written by Susanne Schwenzer, Planetary Geologist at The Open University

Explore More

2 min read

Sols 4434-4436: Last Call for Clouds

Article


2 days ago

3 min read

What ‘Perseverance’ Means on Mars and for Our NASA Family

Article


5 days ago

3 min read

Sols 4431-4433: On the rim of ‘Rustic Canyon’

Article


6 days ago

Keep Exploring

Discover More Topics From NASA

Mars

Mars is the fourth planet from the Sun, and the seventh largest. It’s the only planet we know of inhabited…

All Mars Resources

Explore this collection of Mars images, videos, resources, PDFs, and toolkits. Discover valuable content designed to inform, educate, and inspire,…

Rover Basics

Each robotic explorer sent to the Red Planet has its own unique capabilities driven by science. Many attributes of a…

Mars Exploration: Science Goals

The key to understanding the past, present or future potential for life on Mars can be found in NASA’s four…

Powered by WPeMatico

Get The Details…