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A comment on Space Is Full of Planets, and Most of Them Don't Even Have Stars. Parent comment

Re:Space Is Full of Planets, and Most of Them Don't Even Hav... by havemylife on Wednesday May 30, 2018 @01:43AM (#17185361)
I'm by no means well informed on these topics, but I'm unsure where you're getting your 2 billion year estimate. Furthermore I thought that Earths magnetic field shielded from solar radiation, and additionally that there's a significant amount of radiation in space anyways.

Further questioning I have though is, does solar radiation penetrate through ocean water?

What radiation is between solar systems or what rogue planets would likely encounter, and how that effects single cell life, amino acids, organic compounds, and any other building blocks to life?

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Re:Space Is Full of Planets, and Most of Them Don't Even Hav... by gambiting on Wednesday May 30, 2018 @07:12AM (#17186699)
>>Further questioning I have though is, does solar radiation penetrate through ocean water?

Barely. 10km of water will shield you from almost any amount of radiation, and we know of life forms which live at those depths, so they could have developed even when Earth was completely bathed in radiation.

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