- Look up
planetary in Wiktionary, the free dictionary.
Planetary means relating to a
planet or planets. It can also
refer to:
Planetary habitability, the...
-
Planetary science (or more rarely, planetology) is the
scientific study of
planets (including Earth),
celestial bodies (such as moons, asteroids, comets)...
- A
planetary nebula is a type of
emission nebula consisting of an expanding,
glowing s**** of
ionized gas
ejected from red
giant stars late in
their lives...
-
Planetary romance (other
synonyms are
sword and planet, and
planetary adventure[citation needed]) is a
subgenre of
science fiction or
science fantasy...
- A
planetary system is a set of
gravitationally bound non-stellar
bodies in or out of
orbit around a star or star system.
Generally speaking,
systems with...
-
Planetary habitability is the
measure of a planet's or a
natural satellite's
potential to
develop and
maintain an
environment hospitable to life. Life...
-
Planetary symbols are used in
astrology and
traditionally in
astronomy to
represent a
classical planet (which
includes the Sun and the Moon) or one of...
- An
epicyclic gear
train (also
known as a
planetary ge****t) is a gear
reduction ****embly
consisting of two
gears mounted so that the
center of one gear...
-
Planetary geology,
alternatively known as
astrogeology or exogeology, is a
planetary science discipline concerned with the
geology of
celestial bodies...
- A
planetary core
consists of the
innermost layers of a planet.
Cores may be
entirely liquid, or a
mixture of
solid and
liquid layers as is the case in...
