Bob137 wrote:Some other scientists have stated though that increased radiation can actually cause humans a lot of harm, and maybe even kill, whether NASA will acknowledge that or not, to me is irrelevant.
Guess it can only harm moons with no atmosphere?A NASA study says that solar storms and Coronal Mass Ejections (CMEs) can erode the surface of a body and also strip it of its atmosphere. The study says CMEs might have caused loss of atmosphere by some planets unprotected by magnetic field.
CMEs are massive bursts of solar wind, plasma and magnetic fields rising above the solar corona and released into space. They are often associated with other forms of solar activity, including solar flares.
Science Daily says that a strong CME could contain about a billion tons of plasma traveling in a cloud many times the size of the Earth, at up to a million miles per hour.
The research led by Rosemary Killen at NASA's Goddard Space Flight Center, Greenbelt, Md., says our moon has a very sparse atmosphere called an exosphere, and it is very vulnerable to CME activity. When a plasma from a CME impacts on lunar surface, atoms from the surface of the moon are ejected in a process scientists call "sputtering."
The research team says their study, published in the Journal of Geophysical Research Planets, is the first attempt at studying the impact of CMEs on the lunar surface. According to William Farrell, leader of the team at NASA's Goddard Space Flight Center,
Read more: http://digitaljournal.com/article/315710#ixzz1gLGWBuhy
maxmercury wrote:That is what they suspect happened to Mars (and possibly Mercury if it had an atmosphere at one time) in the distant past.
Venus, Earth, Jupiter and the other gas giants all have strong magnetic fields to protect them from the Sun. I would imagine Mercury gets the worst of it as it is so close to the Sun.
maxmercury wrote:So Mars being tiny had more of a role to play for its thin atmosphere than its core cooling down.
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