Last Updated：2025/12/29
Sentence
Today,
Xena
is
no
longer
Xena
but
has
been
officially
renamed
Eris,
after
the
Greek
goddess
of
strife
and
discord—which
hints
at
the
climate
in
planetary
science
at
the
time.
Its
moon
has
a
similarly
appropriate
name,
Dysnomia
(lawlessness)
in
Greek
mythology,
the
daughter
of
Eris.
Observations
of
Eris
and
Dysnomia
have
confirmed
that
Eris
is
27
per
cent
more
massive
than
Pluto,
though
of
a
similar
diameter.
Quizzes for review
Today, Xena is no longer Xena but has been officially renamed Eris, after the Greek goddess of strife and discord—which hints at the climate in planetary science at the time. Its moon has a similarly appropriate name, Dysnomia (lawlessness) in Greek mythology, the daughter of Eris. Observations of Eris and Dysnomia have confirmed that Eris is 27 per cent more massive than Pluto, though of a similar diameter.
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