How would people measure time in outer space? ?

Question

Thank you so much

Answer 1

Conventional apparatus like clocks and watches that are affected by gravity or its lack, wouldn't work there. Accurate time-keeping is vital there as it is part of navigation process that amy mean the difference between life and death. Cesium (atomic) clock' is the answer.

Answer 2

Usually Earth time is used in calculations and for practical purposes

Answer 3

The same way they measure it on Earth, with a clock. OK there's a very very small amount of time dilation caused by orbiting the Earth at 8 km/s but even after orbiting for more than 1 year the difference would be less than 1 second!  

Answer 4

Just the same way as they do on Earth. Most spacecraft just use a high-quality quartz clock as time source, GPS satellites use an atomic clock.

For critical maneuvers, it is important to correct the internal time of the spacecraft to be synchronized with ground time.  

Answer 5

Of course they would take their watches from earth because humans have adjusted to the 24 hour period for one complete rotation of the earth.  A deeper question is whether people would easily adjust to a different rotation of earth (asleep or awake) if it was 20 hours or 26 hours.  In outer space many artificial time periods could be tried to find an optimum system.  Even ships of the Navy stand four-hour watches 24 hours a day, using an eight-bell time system (each bell is half an hour).  Time keeping would depend upon the mission, required activities and size of the crew to perform essential duties.