- Look up
planetary in Wiktionary, the free dictionary.
Planetary means relating to a
planet or planets. It can also
refer to:
Planetary habitability, the...
- 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 science (or more rarely, planetology) is the
scientific study of
planets (including Earth),
celestial bodies (such as moons, asteroids, comets)...
-
Planetary boundaries are a
framework to
describe limits to the
impacts of
human activities on the
Earth system.
Beyond these limits, the
environment may...
- In astronomy, a
planetary parade, also
known as a
planetary alignment or
planetary procession,
occurs when
multiple planets in the
Solar System appear...
-
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...
-
Planetary habitability is the
measure of a planet's or a
natural satellite's
potential to
develop and
sustain an
environment hospitable to life. Life...
- 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...
- 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...
- A
planetary-m****
object (PMO), planemo, or
planetary body (sometimes
referred to as a world) is, by
geophysical definition of
celestial objects, any celestial...
