Alphabet Key

A Astronaut, Asteroid                                                                                                          

B Black hole, bary center

C Craters, Comets
D dwarf planet, dust
E Earth, Eris
F flying
G galaxy, gravity
H Haumea,
I Infinity,
J Jupiter,
K Kuiper belt
L lunar module
M Moon, Milky way
N Nebula,Neptune

O Orbit,
P pluto, planets
R Rocket 5,
S Stars, Solar System
T Telescope,
U Uranus, 

V Venus,

X x ray telescope
Y

Z  Zero gravity