X-ray telescope
radioscope
radioscopy
tomograph
spectrohelioscope
X-ray astronomy
radio sounding
ionosonde
X-ray machine
altazimuth
astronomy satellite
radio observation
X-ray
quantimeter
SIGINT
magnetotellurics
sky
sounding rocket
radiograph
roentgenoscope
fluoroscope
geoprobe
atmospherology
Skylab
xeroradiography
radioprobe
tellurometer
WINDSAT
radiospectrometer
microprobe
Jodrell Bank
scanography
pyrheliometer
scintillometer
air
pole
astrolabe
geoscience
lithium-drifted silicon detector
contrast material
X-radiation
spy satellite
moon
contrast medium
Moon
XMM
dip sector
solar telescope
telespectroradiometer
aerometeorograph
coronagraph
radiospectrometric
space reconnaissance
roentgenogram
carbacidometer
phototelescope
radiotelemetrically
radiographics
theodolite
transearth
planetship
Nereid
transit
telescope
cosmopod
radiotelemeter
spectroheliokinematograph
spectroheliometer
Wilhelm Konrad Rontgen
radiotelemetric
radar astronomy
Roentgen
extraterrestrial object
sublunary
supersoft
Rontgen
autoradiography
La Silla
space
space travel
outer space
estraterrestrial body
spacefaring
spaceflight
sublunar
isogeotherm
spyglass
Wilhelm Konrad Roentgen
planetologist
cislunar
Kepler
telephotometer
ceilometer
bird
teleotoscope
barosphere
intrasatellite
secondary