“They’re out there,” goes a saying about extraterrestrials. It would seem more likely to be true in light of a new study on planetary axis tilts. Astrophysicists at the Georgia Institute of Technology modeled a theoretical twin of Earth into other star systems called binary systems because they have two stars. They concluded that 87% of exo-Earths one might find in binary systems should have axis tilts similarly steady to Earth’s, an important ingredient for climate stability that favors Read more [...]