Mars is the fourth planet from the sun and has a distinct rusty red appearance and two unusual moons. The Red Planet is a ...

For years, nuclear propulsion sat in the same category as so many ambitious space ideas, impressive on paper, always a few ...

New panoramic views from NASA's Curiosity and Perseverance rovers reveal dramatically different Martian terrains shaped by ...

A crewed expedition to Mars promises to push the absolute limits of human endurance. To grasp the sheer scale of the journey, ...

Ask someone on Earth for the time and they can give you an exact answer, thanks to our planet’s intricate timekeeping system, built with atomic clocks, GPS satellites and high-speed telecommunications ...

A mysterious interstellar comet — just the third such object ever confirmed to have entered our solar system — streaked past Mars last week. A spacecraft in orbit around the red planet had a front-row ...

This summer, scientists spotted an incredibly rare visitor to Earth’s solar system—a comet, now known as 3I/ATLAS, that entered our solar system from the galaxy beyond and is zipping past the sun at a ...