Dr. Meera Iyer

Meera's fascination with timekeeping started in a way most people wouldn't expect — not with clocks, but with stars. During her doctoral research, she spent long stretches at remote observatories calibrating instruments that needed to agree on the time to within a few nanoseconds. A discrepancy of even a microsecond could throw off the positional data for an entire night's observations. That experience left her with a deep appreciation for just how much of modern technology depends on extraordinarily precise time.

After completing her PhD, she spent eight years in precision timekeeping research, working on atomic clock comparison methods, satellite timing validation, and the subtle corrections needed to reconcile the time kept by orbiting satellites with clocks on the ground (general relativity makes this surprisingly tricky — clocks in orbit run faster by about 38 microseconds per day). She also contributed to the timing subsystem documentation for a regional navigation satellite constellation, ensuring that the onboard clocks stayed synchronized to within a few billionths of a second.

Her published work spans solar observation techniques, lunar cycle prediction algorithms, and the intersection of astronomical timekeeping with civil time standards like UTC. She has a particular interest in how ancient civilizations — from the Vedic astronomers who tracked nakshatras to the Babylonians who gave us the 60-minute hour — arrived at remarkably accurate time measurements with nothing more than shadows, water, and patience.

Outside of research, Meera is a regular science communicator. She has written popular explainers on topics ranging from why sunrise times shift unevenly through the year to how the Moon's orbit produces the 18.6-year nodal cycle that modulates tidal extremes. Her approach to writing is grounded in one principle: if you can't explain the physics without jargon, you probably don't understand it well enough yourself.