Water in Mars

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Observations of the Red Planet indicate that rivers and oceans may have been prominent features in its early history.

Once a time,Mars could supprted microbial life,like the Earth,with less gravity and a thinner atmosphere because Mars was a warm and wet planet.When its evaporated,liquid escaped into space and less fall back to the surface of the planet.

The water was founded trapped within the ice caps at the poles of the planet.In the summer,the liquid turn into gas,because of the increasing temperature,and in winter,lower temperatures cause them to grow to latitudes as low as 45 degrees.

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CAPS OF WATER

These caps of frozen water are 3 kilometres average thick and could cover the Mars surface’s with 5.6 metres of water.

Liquid water appears to flow from some steep, relatively warm slopes on the Martian surface. Researchers studying images taken by the High Resolution Imaging Science Experiment (HiRISE) camera aboard the Mars Reconnaissance Orbiter (MRO) noticed dark streaks that appear during warm weather but fade away when temperatures drop. Spectral analysis of these streaks, called recurring slope linae (RSL), lead scientists to conclude they are caused by salty liquid water.

More water may be frozen just beneath the surface, covered by the dry red dust that blankets the planet, scientists say. Some high-latitude regions seem to boast patterned ground-shapes that may have formed as permafrost in the soil freezes and thaws over time. The European Space Agency’s Mars Express spacecraft captured images of sheets of ice in the cooler, shadowed bottoms of craters

LIQUID IS GOLD

Featured imageWater may seem like a very common element to those of us stuck on Earth, but it has great value. In addition to understanding how Mars may have changed and developed over time, scientists hope that finding water will help them to find something even more valuable — life, either past or present.

Only Earth is known to host life, and life on our planet requires water. Though life could conceivably evolve without relying on this precious liquid, scientists can only work with what they know. Thus they hope that locating water on celestial bodies such as Mars will lead to finding evidence for life.

With this in mind, NASA developed a strategy for exploring the Red Planet that takes as its mantra “follow the water.” Recent orbiters, landers and rovers sent to Mars were designed to search for water, rather than life, in the hopes of finding environments where life could have thrived.

That has changed, however, with the flood of evidence these robots have returned. Curiosity determined that Mars could indeed have supported microbial life in the ancient past, and the next NASA rover — a car-size robot based heavily on Curiosity’s basic design — will blast off in 2020 to look for evidence of past Red Planet life.

Bibliography:

https://en.wikipedia.org/wiki/Water_on_Mars

https://www.nasa.gov/press/2015/march/nasa-research-suggests-mars-once-had-more-water-than-earth-s-arctic-ocean/

Adrián Marín Martín & César Martín Rodríguez.

El subsuelo de Marte

El subsuelo de Marte podría albergar «bolsas de hielo», según científicos

Vamos a hablar del subsuelo de Marte ya que nos resulta bastante interesante. De esto podemos decir, según lo que hemos leído que Marte no deja de sorprender a los científicos.

Una investigación coordinada por Jose Alexis Palmero Rodríguez , del Instituto de Ciencias Planetarias en Tucson (estado de Arizona, EE.UU), con la participación del científico español Alberto Gonzalez Fairen (Centro de Astrobiología de Madrid, CAB) ha concluido que los grandes acuíferos que se localizaban bajo el Planeta Rojo fueron en su origen depósitos  regionales de sedimentos y hielos, que venían de zonas volcánicas en las tierras altas marcianas. Algunos de estos depósitos podrían aun encontrarse en el subsuelo marciano, según ha apuntado este estudio publicado en «Scientific Reports».

González Fairén ha explicado que algunos acuíferos se vaciaron formando enormes canales de avalancha. En concreto, los autores de esta investigación, han sostenido que estas grandes masas de agua terminaron desembocando en las tierras bajas de Marte formando grandes océanos hace más de 3.000 millones de años. Incluso, ha apuntado este investigador, “es posible que queden aun bolsas subterráneas de hielo mezclado con roca”.

Finalmente, después de 3.650 millones de años, el hielo concentrado bajo la superficie en las tierras altas marcianas por diferentes procesos sedimentarios y el cambio climático en el Planeta Rojo, se habría fundido por la reactivación de algunas áreas volcánicas, formando grandes ríos subterráneos que, en opinión de los investigadores, alcanzaron la superficie modelando el terreno, excavando cañones y cubriendo importantes áreas.

El estudio describe las posibles localizaciones de estos antiguos acuíferos subterráneos en Marte. Para González Fairén «conocer con exactitud el origen de estos ríos, y saber que no todas las fuentes se drenaron» podría dar pistas a los científicos para saber dónde puede haber hoy hielo. Un recurso que, ha añadido este investigador, podría ser «utilizable» para diferentes fines.

¿SERÁ MARTE UN PLANETA HABITADO?

Por: Maria del Mar Lozano Rey,  Candela Jiménez Mercado.

Bibliografía: http://www.abc.es/ciencia/20150923/abci-marte-acuiferos-inundaciones-201509231112.html