Basic assumptions asserts this world may host other forms of life. Now chances to encounter them are higher…
Sigular planet seen to contain life: Earth. A proper distance to Sun has made it possible. Thus Earth receives a reasonable amount of energy from Sun, the extreme temperatures have been avoided. Our planet it is also lying inside the Sun’s liveable zone. Many other planets are likely to sustain life, standing in the area of their star.
Seasons take place because Earth’s axial tilt (obliquity) is almost 23.5 degrees. Because Mars has approximately 25 degrees, it experiences the Earth’s four seasons. Yet, the axial tilt of Mars is not stable, and over millenniums, it differed from 0 to 60 degrees. Instilling the hostile climate swings, Mars cannot harbor any kind of life. Another issue of it is the absence of large standing bodies of liquid water. The challenging seasons triggered the rapid water evaporation.
For alien planets having absent satellite, consequences can be inflicted. The result of gravitational tugs would make a tough habitat for humanity. But facts are exoplanets don’t demand a massive moon around.
Scientist proved that their climate won’t face dramatic changes over millions of years. They considered all particularities of Kepler-186f and Kepler-62f, as they are bigger than Earth, have a similar rotation, gravitation and the effect of neighboring planets over them. They generated a computer simulation, resulting in unchanged axial tilt