When our sun was young, it was significantly less luminous and sent out significantly less warming energy than it does now. Scientists estimate that 4 million years ago, when the sun and our solar system were 500 million years old, the energy that the sun produced and dispersed was about 75 percent of what it …
Forget the "Habitable Zone," Think the "Biogenic Zone"
It is hardly surprising that in this burgeoning exoplanet era of ours, those hitherto unknown planets get most of the attention when it comes to exo-solar systems. What are the planet masses? Their orbits? The chemical makeup of their atmospheres? Their potential capacity to hold liquid surface water and thereby become "habitable." Less frequently …
Continue reading "Forget the "Habitable Zone," Think the "Biogenic Zone""
Forget the "Habitable Zone," Think the "Biogenic Zone"
It is hardly surprising that in this burgeoning exoplanet era of ours, those hitherto unknown planets get most of the attention when it comes to exo-solar systems. What are the planet masses? Their orbits? The chemical makeup of their atmospheres? Their potential capacity to hold liquid surface water and thereby become "habitable." Less frequently highlighted …
Continue reading "Forget the "Habitable Zone," Think the "Biogenic Zone""
Many Worlds 