A routine pass behind Mars marked the end of an era for one of NASA’s most important space missions. After more than a decade orbiting the Red Planet and delivering groundbreaking insights into its atmosphere,

Mars is usually a safe 225 million kilometers away from Earth, but what if the red planet went off course and headed straight toward us? This nightmare scenario would cause devastation long before the planets actually collided. The gravitational pull ...

Earth's climate has swung between ice ages and warmer periods for millions of years, driven by subtle changes in our planet's orbit and axial tilt. These variations, known as Milankovitch cycles, occur because Earth doesn't orbit the sun in isolation.

Earth–Venus–Mars opportunity looks promising. 10–15 on-orbit refueling operations may be needed to make a crewed ship full. (A version 4 Starship could

A manganese ring shows Mars' Utopia Planitia once held a stable ocean for around one million years, long enough for life to begin.

Mars holds a special place in the solar system. It represents marginal habitability. This means it transitioned from warm and wet and potentially hospitable, to cold and dry and inhospitable.

From the most powerful telescope orbiting Mars comes a new view of Earth and its moon, showing continent-size detail on the planet and the relative size of the moon ...