Scientists Calculate Time Differences Between Mars and Earth

A new timekeeping model reveals that clocks on the Martian surface run faster than those on our home planet.

Updated on Oct. 21, 2026 in Space

A brass armillary sphere model rests on a polished wooden table, illuminated by a sharp shaft of light in an observatory. — Researchers at the National Institute of Standards and Technology have calculated that clocks on Mars run faster than those on Earth due to gravitational variations. AI Illustration. Upload story photo >

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Researchers at the National Institute of Standards and Technology have developed a model calculating the passage of time on Mars compared to Earth. The study finds that Martian clocks tick faster due to the planet's orbital motion and gravitational environment.

Why it matters

Understanding these temporal variations is essential for developing precise navigation and communication infrastructure for future crewed space missions. The findings provide a framework for maintaining synchronization between Earth-based systems and hardware operating on Mars.

The study utilized a model accounting for the gravitational influence of the Sun, Earth, and Moon alongside the orbital motion of Mars. Researchers determined that an individual spending 50 years on Mars would age nine seconds more than on Earth.

The players

National Institute of Standards and Technology

This is a United States federal agency that promotes industrial competitiveness by advancing measurement science, standards, and technology.

The Astronomical Journal

This is a peer-reviewed scientific journal that covers research in the field of astronomy and astrophysics.

The details

The team established that clocks on Mars run an average of 477 microseconds per day faster than those on Earth. Because Mars follows an elongated orbit, the gravitational influence of the Sun shifts throughout the year, causing the daily time difference to fluctuate by up to 226 microseconds.

October 21, 2026: Research results were published in The Astronomical Journal.

The Big Picture

The study applies Einstein's theory of relativity to quantify the influence of gravity and motion on timekeeping at a planetary scale. This work effectively bridges the gap between theoretical physics and the practical needs of interplanetary navigation systems.

While these microsecond differences are negligible for daily life on Earth, they are critical for the hardware and software utilized in future space travel. Precision in timekeeping will directly impact the reliability of automated landing sequences and data relays during upcoming missions.

The takeaway

This study highlights how fundamental physics must be integrated into the logistical planning of multi-planetary exploration. Accurate time synchronization will be a cornerstone technology as humans attempt to maintain consistent communication across interplanetary distances.