The Sun

The sun -- our friend or enemy?

On Alterra, a blast from its sun similar to this destroyed its atmosphere and left it a desert

The straggling survivors lived on Colony Earth, facing a mortal choice.

http://www.msn.com/en-us/video/news/scientists-are-preparing-for-a-solar-superstorm-that-could-cause-dollar2-trillion-in-damages/vi-BBrIT6V?ocid=st

Mass extinctions to "Planet X"

Follow this link for an update on "Planet X"
http://m.phys.org/news/2016-03-links-mass-extinctions-planet.html