analyzing
astronomy
blue
cosmos
device
discover
discovery
element
equipment
eye
eyepiece
eyesight
find
focus
glass
icon
information
instrument
learning
lens
look
magnification
magnify
modern
object
observation
observe
ocular
optic
optical
planet
planetarium
science
scope
search
sign
simple
sky
space
spy
spyglass
star
telescope
tool
tripod
universe
view
vision
watching