A NASA mission has spotted an Earth-size exoplanet orbiting a small star about 100 light-years away. The planet, named TOI 700 e, is likely rocky and 95% the size of our world. The celestial body is ...

Exoplanets like Earth have been discovered but not all Earth-like planets are equal when it comes to alien life.

A new study presents a compelling new model for the formation of super-Earths and mini-Neptunes -- planets that are 1 to 4 times the size of Earth and among the most common in our galaxy. Using ...

Mars’s gravity shapes ice ages on Earth, new research finds - 'Without Mars, Earth’s orbit would be missing major climate ...