Red Planet clock unlocked: NIST physicists crack what time it is on Mars and the answer is here
Einstein explained that gravity affects each passing second. Clocks slow down where gravity grows stronger. Clocks speed up where gravity becomes weaker.
A familiar glance at Earth clocks gives certainty. Atomic time and satellites guide each passing second. Yet things shift once clocks leave the planet. Scientists now face a vital cosmic question. What exact time should define daily life on Mars?
How fast do clocks tick on Mars?
Physicists at the National Institute of Standards and Technology calculated the answer. Their results appear in The Astronomical Journal. They found Martian clocks tick faster each day. The increase reached an average of 477 microseconds daily. The Martian year creates wide timing variations. These shifts reached 226 microseconds in certain periods. Earlier work by NIST detailed lunar timekeeping methods. That study appeared in 2024 publications. Bijunath Patla explained the importance of timing. NASA needs precise clocks for future missions. Accurate time helps navigation across deep space.
Why do Martian clocks stay out of sync?
Einstein explained that gravity affects each passing second. Clocks slow down where gravity grows stronger. Clocks speed up where gravity becomes weaker. Orbital velocity influences time passage as well. NIST chose a fixed Martian surface point. This acted like Earth’s sea level reference. Years of mission data revealed local gravity values. Gravity on Mars is five times weaker than Earth’s. Patla and Neil Ashby needed more variables added. They considered the Sun’s huge pull across space. They added effects from Earth, the Moon and Jupiter. These interactions create Mars’ eccentric long orbit. Lunar timing remains steady at 56 microseconds faster. Mars shows larger variations due to orbital changes. Patla described the complex four-body calculations involved. These calculations proved more difficult than expected.
Why does Martian time matter for communication?
Even tiny differences reshape communication networks. Modern 5G technology needs extreme accuracy. Mars signals face long delays today. Delays range from four to 24 minutes. Patla compared current links to old sea crossings. Messages drift slowly between planets today. A shared timing system could change that future. Synchronised networks could ease communication burdens. Information could flow faster with reduced confusion. Ashby said missions remain decades from high traffic. Yet early study helps prepare for future needs. Navigation systems will demand accurate clocks. These clocks rely on Einstein’s general relativity. Understanding timing strengthens deep space planning.
