Many planets which have the proper temperatures for liquid water on their surfaces was once too scorching or too chilly, which can have an effect on their skill to host life now
Space
19 January 2023
Illustration of two planets orbiting a pink dwarf star NASA/JPL-Caltech
A big proportion of planets within the so-called habitable zone – the world in orbit round a star the place situations are proper for liquid water on a world’s floor, and thus doubtlessly for all times – weren’t all the time there. That may imply that we’re vastly overestimating the variety of worlds that might host life.
While researchers typically consider the liveable zone of any given star as being comparatively static, it truly modifications because the star evolves and its brightness and temperature …
Article amended on 19 January 2023
We corrected the proportion of planets within the liveable zone that might not be good for all times