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Scientists have calculated just how much faster clocks tick on Mars

By Megan Lim,

Christopher Intagliata, Scott Detrow

Published December 9, 2025 at 3:05 PM CST

Clocks tick faster on Mars than they do on Earth, in part because Mars experiences less gravitational pull from the Sun. Now scientists have calculated just how much faster -- 477 microseconds, on average.

Megan Lim

Christopher Intagliata

Christopher Intagliata is an editor at All Things Considered, where he writes news and edits interviews with politicians, musicians, restaurant owners, scientists and many of the other voices heard on the air.

See stories by Christopher Intagliata

Scott Detrow

Scott Detrow is a White House correspondent for NPR and co-hosts the NPR Politics Podcast.

See stories by Scott Detrow

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