S-E-M System

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XHWAWDGCJTSEUIGLUJAL CALENDARTSOLARSYSTEM SASTRONOMYNYVYEENSQI GJRFEYIKMILKYWAYNTSB TAZERPNTCFIUMZSANAOL CONSTELLATIONQOAORLB FGCJZEPSATNBXDNTRNSX AYCLHIMWPROYEZESBVTO LQMOONYAPFERONUSIWIN LSPRINGGIAJTANTOTMCI SUMMERCIVDCLNVGLAZEU UXOGOZZFOYPWCIYAXSAQ CONSTELLATIONEWRILNE ETILTEREVOLUTIONSEAS AFHUBLXWPSSRCYYOKASK RGWHNPEPZTLEXGROCPAE TPJECLIPSENATZANOYZH HGLQEJUKISLUDNNCMEIM ILHPXHUKBAQTMUSKEAIA VQAGZQGLGDMZSZRYTRWB
1.
sun
2.
galaxy
3.
moon
4.
earth
5.
astronomy
6.
star
7.
constellation
8.
solarsystem
9.
planet
10.
axis
11.
season
12.
rotation
13.
revolution
14.
solstice
15.
equinox
16.
leapyear
17.
orbit
18.
constellation
19.
milkyway
20.
calendar
21.
eclipse
22.
summer
23.
winter
24.
fall
25.
spring
26.
tilt
27.
solarnoon
28.
diameter
29.
anasazi
30.
comet