Comment on Searching for signs of life on exoplanets is tough.
Skyrmir@lemmy.world 7 hours agoJust about every element comes out of a super nova. By the time it’s around a planet, Oxygen has made friends, usually Hydrogen, so it’s no longer free molecules.
sbeak@sopuli.xyz 6 hours ago
Oxygen can make friends with other oxygen, no? O2. It isn’t only produced by biotic means…
Also, not every element comes out of a supernova. Elements that are heavier than iron and nickel are created when a neutron stars merge! Very cool. Not to mention all the manmade elements…
Skyrmir@lemmy.world 6 hours ago
o2 isn’t as stable as most molecules containing oxygen. Free o2 oxidizes damn near everything, so it doesn’t last in an atmosphere without a new source. Take a look at the solar system. Every planet has oxygen, none of it is o2 outside of earth.