IVOAT Thesaurus
Toggle navigation
Home
Advanced search
About...
My account
0-9
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Home
O
:
139
terms
O
USE
oxygen
O association
O cluster
O dwarf
O giant
O magnitude
O star
O subdwarf
O supergiant
O-association
USE
O association
OB association
OB star
OB supergiant
objective
objective grating
objective prism
oblateness
oblique rotator
obliquity
USE
obliquity of ecliptic
obliquity of ecliptic
observation
observational cosmology
observatory
observing technique
occultation
occulting disk
ocean tide
oceanography
Oe star
Oef star
Of star
OH
USE
hydroxyl radical
OH absorption
OH cloud
OH emission
OH IR star
OH line
OH maser
OH radical
USE
hydroxyl radical
OH source
OH-IR star
USE
OH IR star
old star
Omega baryon
Omega Lambda
Omega mass
Omega parameter
Omega(baryon)
USE
Omega baryon
Omega(Lambda)
USE
Omega Lambda
Omega(mass)
USE
Omega mass
omicron Ceti star
USE
Mira variable star
on line system
USE
on-line system
on-line system
Oort cloud
Oort comet cloud
USE
Oort cloud
Oort constant
Oort formulae
Oort formulas
USE
Oort formulae
Oosterhoff group
opacity
open star cluster
open universe
Opik theory
opposition
optical aberration
optical burst
optical component
optical counterparts
USE
optical identification
optical depth
optical design
optical double star
optical equipment
USE
optical instrument
optical fiber
optical film
optical filter
optical flare
optical glass
optical identification
optical instrument
optical interferometer
optical interferometry
optical material
optical observation
optical observatory
optical outburst
optical pathlength
optical position
optical property
optical pulsar
optical radar
optical scanners
optical spectrograph
optical spectrometer
USE
optical spectrograph
optical spectroscopy
optical surface
optical system
optical telescope
optical testing
optical thickness
USE
optical depth
optical transfer function
optical transmission window
optical waveguide
optical window
optics
orbit
orbit determination
orbital anomaly
orbital element
orbital evolution
orbital motion
orbital theory
orbital velocity
orbiting observatory
USE
space observatory
organic matter
organic molecule
orientation
origin
orion population star
orrery
orthohydrogen
orthoscopic eyepiece
Os
USE
osmium
oscillating universe
oscillation
oscillator strength
osculating orbit
osculatory element
osmium
OTF
USE
optical transfer function
outburst
outer planet
outgassing
overabundance
overtone frequency
overtone mode
overtones
USE
overtone frequency
overtones
USE
overtone mode
oxygen
oxygen burning
ozone layer