Epoch Versus Equinox
Astronomical data are often specified not only in their relation to an epoch or date of reference, but also in their relations to other conditions of reference, such as coordinate systems specified by "equinox", or "equinox and equator", or "equinox and ecliptic" – when these are needed for fully specifying astronomical data of the considered type.
Read more about this topic: Epoch (astronomy)
Famous quotes containing the word epoch:
“According to U.S. strategy, if you never see the other, his destruction will be more acceptable ... so that when Iraqi soldiers surrendered, sooner than expected, it was as if they emerged from a dream, a flash-back, a lost epoch—an epoch when the enemy still had a body and was still “like us.””
—Serge Daney (1944–1992)