Space/Science — HabitableZone

Space/Science » in reply to How to find an interstellar species? Look for their clock.

Cosmic Microwave Background

Hi REB

The CMB is the Universe's preferred reference frame - allowed in GR - and allows a rough chronometry anywhen in space-time. Eclipsing Binary systems would allow ultra-precise positioning, while natural pulsar clocks allow near perfect time-keeping.

Adam

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