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Tyburn
09-03-2009, 12:06 AM
Scientists think they know what went wrong with the Planet Mars. Earth and Mars were formed at similar times and both are similar in composition, that is to say, both are the product of many collisions between rocky protoplanets.

In both case, the planets have a metalic core, the heat from the protoplanet collisions kept the core hot, and the metal brought density and density means gravity, and gravity means that as the crust cools the fumes stay with the planet as an atmosphere.

They speculate that Mars had a dense Atmosphere and that it had running water on its serface.


Here is where the adage "Size matters" has never been more poingent.

It looks like not only do you have to get the right distance and the right axis from the sun to promote life. You also need to be above a certain size and have a metalic core. A metalic core means you have a magentosphere which is a giant magnetic barrier around the planet which deflect the rays from the sun which kill life and incidently corrode without repair the Atmosphere.

But in order to keep a magnetosphere, you need a warm and molten metalic core...and if your planet is small...it cools quicker...to quick a cooling process and the core goes out.

When this happens the magnetif field of the planet destabilizes and the atmosphere gets bombarded by rays....following that the density changes and the atmosphere gets blown right off into space.

Mars they discovered had a tiny magnetic field, now has next to no atmosphere, is smaller then earth, has a cool metalic core.

Goodbye running water, goodbye any chance of life.

They do not believe there was time whilst the planet was habitable for much life to develope, if any :sad:

Considering they age the planet at about 4billion years old, and considering they've done tests on an impact crator dated at the 3 Billion years mark and found it completely demagnatized...they say the planet lost its life somewhere within the first billion years...they speculate just a few hundred Million years...thats pushing it for bacterial and water based single cell life...let alone anything else...water or no water :'( Dont forget you have to half that number, because it will take perhaps a hundred million for the planets crust to form and an atmosphere to develope in the first place...so halved...it must have been all ready for life when the lights went out!

TexasRN
09-03-2009, 12:31 AM
I know exactly what happened. God liked Earth better. :)


~Amy

rockdawg21
09-03-2009, 02:04 AM
If Earth lost its' atmosphere, it would also have a cool solid core. Ozone traps the warmth of the Earth, thus, if we lose the ozone, it would be absolute zero on the surface and the core of the Earth would gradually cool as well.