Companion planets can increase old worlds' chance at life

Aug 1, 2014 Full story: Science Daily

Having a companion in old age is good for people -- and, it turns out, might extend the chance for life on certain Earth-sized planets in the cosmos as well.

Full Story

“Geologist [I'm Climate Change]”

Since: Mar 07

formerly Nuneaton

#1 Aug 4, 2014
Nice idea for red dwarves with relatively Mg rich planets covered by water. Would then get lots of little yellow bugs around deep marine vents.

The usual expectation with close in planets around red dwarves however is mini gas giants & titanides with a composition similar to titan but rether bigger & rather hotter as a result of condensation directly out of the nebula dropping onto the star.

The problem there is having enough surface to actually live on as the result in the case of a titanide is an oil slick on the surface, a methane nitrogen atmosphere, lots of dissolved complex organics (probability of life there) beneath the slick, & in the deep ocean a few hundred Km down a degassing effect on carbonaceous goop heavy enough to sink & eventually graphitisation of the carbon typical of oil & gas maturation bubbling up CH4 and N2 to replenish the atmosphere. A big titanide of super earth sizemay actually have a diamond layer beneath all the graphite.

Be a bit hard for life to get going, as with all the methane, the atmosphere would be greenhoused until the planet is on the far outer end of the lifezone. Any little green bugs found would be an accident of the outer shell coat coplour, definitely no O2 there.

Have a nice day: Ag

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