Discovery of a new planet was big news. Invisibly, it
expanded our lives. It at least renewed the use of a name for
something that we might agree could mean something similar from
one person to the next.
Ephemerides, books of tables giving the positions of the
planets in the zodiac, are used with our dates and times of birth
by astrologers to convey a sense of scientific credibility to
their generalities and rules of thumb.
See also in The book of science:
Readings on wikipedia: