kidzsearch.com > wiki   Explore:images videos games  

Epoch (astronomy)




KidzSearch Safe Wikipedia for Kids.
Jump to: navigation, search

In astronomy, an epoch (or sometimes epochal moment) is a moment in time for which the position or the orbital elements of a celestial body are specified.

The position at other times can be measured by taking into account proper motion or orbital motion. In the case of orbital elements for a solar system body, these change due to perturbation by other bodies in our solar system.




Help Improve This Page: Please contact us to become an approved KidzSearch editor and provide your credentials. You can also give immediate feedback in our (astronomy) Wiki Feedback Forum.