A superhabitable world ...

By Merijn Hos and Jurriaan Hos

Finding worlds more hospitable to life versus. earth is a no brainer as photosynthesis is quantum,
thus scale invariant and able to function under different light sources.

A few years ago, in a lab in Berlin, the astrobiologist Iva Vilović was thrilled when she observed garden cress sprouting under a light designed to mimic a “K-dwarf” star — an orange-hued star that’s cooler and slower burning than our yellow sun. To her surprise, the cress grew even faster and taller than it did under simulated sunlight.

Her results suggested that photosynthesis, the process that supplies the energy for Earth’s entire food web, can happen on planets orbiting these orange stars. “K-dwarf light is a very, very interesting light source, and it should be considered, if not prioritized, for any type of search for extraterrestrial life, in my opinion,” said Dr. Vilović, now at the Leibniz Institute for Astrophysics in Potsdam, Germany.

They're everywhere :)

In particular, alien life may thrive in the light of these stars on planets that are slightly larger than Earth, known as super-Earths. Scientists like Dr. Vilović believe super-Earths that orbit K-dwarfs might, in fact,
be the liveliest places in the galaxy — perhaps even more suitable for life than here. 

Scientists call these “superhabitable worlds,” planets that would allow carbon-based life to persist longer and become even more complex and diverse than on Earth.

A superhabitable world — as scientists imagine it — is about 20 to 30 percent wider and twice as massive as Earth, and is placed at the right distance from its star for water to flow on its surface. The stronger gravity of this bigger Earth would hold on tighter to ambient molecules than Earth does, giving the planet a thicker atmosphere and a warmer and more stable climate, fueling the growth of extraterrestrial plants and animals (or their equivalents). The super-Earth’s bigger iron core would erect a stronger magnetic field around it, better blocking cosmic radiation.

As for the superhabitable planet’s surface, picture paradise. An enlarged orb would be rounder and smoother than Earth, as its stronger gravity erodes continental shelves and fills in trenches. Water would spill evenly over its surface as shallow lakes and seas.

Just resting