Wednesday, March 18, 2015
PLANET REVEALS! Version 1
How many of you crazy for news from the universe? Well, every news is from the universe, but most of it is from your planet. What if it is from some outer planet? Yes, you already know that water has been discovered in the soil of Mars, HERE ARE THE DETAILS –
Water on Mars exists today almost exclusively as ice, and is located in the Martian polar ice caps and under the shallow Martian surface even at more temperate latitudes. More than five million square km of ice has been identified on the surface of modern Mars, which is enough to cover the whole planet to a depth of 35 meters. Even more is likely to be locked away in the deep subsurface. A small amount of water vapour is present in the atmosphere.
There are no bodies of liquid water on the Martian surface because its atmospheric pressure at the surface averages 600 Pascal (0.087 psi) —about 0.6% of Earths mean sea level pressure— and because the temperature is far too low, (210 K (−63 °C)) leading to immediate freezing. Despite this, about 3.8 billion years ago,there was a denser atmosphere, higher temperature, and vast amounts of liquid water flowed on the surface, possibly including large oceans. It has been estimated that the primordial oceans on Mars could have covered around one third of the planet. Water has also apparently flowed across the surface for short periods at various intervals more recently in Marss history.
AN ARTISTS IMPRESSION OF HOW ANCIENT MARS LOOKED LIKE
There are a number of direct and indirect proofs of water presence either on or under the surface, e.g. dry stream beds, polar caps, glaciers, radar and spectroscopic measurements, eroded craters and weathered minerals directly connected to the past existence of liquid water. Several Mars orbiters have detected the basins of ancient lakes, ancient river valleys, and evidence of widespread glaciations, while several landers and rovers directly analyzed soil and water ice from the shallow sub-surface.
Although the surface of Mars was wet and could have been hospitable to microbial life billions of years ago,the present damaging effect of ionising radiation on cellular structure is one of the prime limiting factors on the survival of life on the surface.
DRIED CHANNELS IN WARREGO VALLES IN MARS
Therefore, the best potential locations for discovering life on Mars may be at subsurface environments.
Credit : Wikipedia and Physics.org
(A few changes made)
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