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Planedau a Lleuadau / Planets and Moons - Lexicon

planed
planet
lleuad
moon
orbit
orbit
lloeren
satellite
asteroid
asteroid
comed
comet
disgyrchiant
gravity
system solar
solar system
eclips
eclipse
crater
crater
telesgop
telescope
gwregys asteroidau
asteroid belt
meteor
meteor
nebula
nebula
galaeth
galaxy
seren
star
echelin
axis
cylchdro
rotation
chwyldro
revolution
awyrgylch
atmosphere
cramen
crust
mantell
mantle
craidd
core
magnetosffer
magnetosphere
cyfnod
phase
llanw
tide
blwyddyn golau
light year
chwiliedydd gofod
space probe
teithiwr
voyager
mercwri
mercury
gwenws
venus
ddaear
earth
Mawrth
mars
Iau
jupiter
Sadwrn
saturn
wranws
uranus
Neifion
neptune
plwton
pluto
planed corrach
dwarf planet
gofod
space
archwilio
exploration
effaith asteroid
asteroid impact
fflach solar
solar flare
twll du
black hole
cytser
constellation
orbitio
orbiting
cyhydnos
equinox
heuldro
solstice
nefol
celestial