Here’s how long we have before Earth is uninhabitable | Redux

Here’s how long we have before Earth is uninhabitable

Walk Against Warming by Erland Howden
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Excerpt:

The Earth is warming some now, but this is not a post about human-induced climate change. Regardless of what we do, in a couple of billion years the Earth is going to warm A LOT. Our Sun, Sol, is a G-class star. It is now about 4. 5 billion years old, and in about five billion years it will begin rapidly expanding into what’s known as a “red giant. ” Clever name, that, because the Sun will in fact become a giant red star and eventually expand beyond the Earth’s orbit. Everything on the planet will be incinerated. Solar life cycle. (Wikimedia) But in truth, Earth will become unlivable a lot earlier than that. A new study, a pre-print of which is on arxiv. org, says that will happen quite a bit earlier. As the Sun ages, its luminosity will increase, making it become larger and brighter.

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climate change plate tectonics carbon solar luminosity carbon dioxide organic carbon red giant 100 years higher plants greenhouse gases sedimentary rocks water vapor red star cloud cover water loss plant life Wright brothers animal life global temperature human species to survive atmospheric other worlds the earth pre-print arxiv.org Wikimedia single-celled silicate Clever myriad orbit G-class transhumanists incinerated asteroids scenario amphibians oceans endotherms evaporate recycled planet biological a silver lining silver flight Fish requirements paper

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Here’s how long we have before Earth is uninhabitable

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The Earth is warming some now, but this is not a post about human-induced climate change. Regardless of what we do, in a couple of billion years the Earth is going to warm A LOT. Our Sun, Sol, is a G-class star. It is now about 4.5 billion years old, and in about five billion  Read More

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Full Content: http://blog.chron.com/sciguy/2012/11/heres-how-long-we-have-before-earth-is-uninhabitable/

http://www.alchemyapi.com/