No life beyond Earth has ever been found and there is no evidence that aliens have ever visited our planet. Yet this does not mean the Universe is lifeless. Although no clear signs of alien life have ever been detected, the possibility of extraterrestrial biology is growing increasingly plausible.
Georgia Institute of Technology astrophysicists have now added to the weight of extraterrestrial evidence.
The team modelled a theoretical twin of Earth into other solar systems dubbed binary systems because they boast two stars.
Their startling results suggest 87 percent of exo-Earths one might find in binary systems should have axis tilts similarly steady to Earth’s.
Such a tilt is considered an important ingredient for climate stability, capable of favouring the evolution of complex life.
Earth’s gentle obliquity variations have been great for a climate conducive for evolution to occur.
Mars, however, has an axis tilt that likely helped destroy its atmosphere.
The researchers then modelled Earth into habitable areas, known as or Goldilocks Zones in Alpha Centauri AB – our Solar System’s nearest neighbour – a binary system with star “A” and star “B.”
After that, the team expanded the model to a more universal scope.
Billy Quarles, the study’s principal investigator, said: “We simulated what it would be like around other binaries with multiple variations of the stars’ masses, orbital qualities, and so on.
“The overall message was positive but not for our nearest neighbour.”
Although Alpha Centauri A looks like a promising place to search of alien life, the prognosis for mild axis dynamics on an exo-Earth modelled around star B was poor.
This will disappoint many in the space community because Alpha Centauri AB is four lightyears away.
A mission named Starshot with big-name backers plans to launch a space probe to look for signs of intelligent alien life there.