Physics & Astronomy
stars
100%
European Southern Observatory
48%
planetary nebulae
47%
subdwarf stars
41%
supernovae
38%
radial velocity
38%
B stars
27%
hot stars
26%
atmospheres
20%
orbitals
20%
proper motion
19%
helium
18%
envelopes
17%
O stars
17%
galaxies
17%
binary stars
16%
photometry
16%
high resolution
15%
light curve
14%
estimates
14%
spectrum analysis
14%
Magellanic clouds
13%
galactic halos
13%
main sequence stars
12%
gravitation
11%
orbits
11%
halos
10%
telescopes
10%
globular clusters
9%
asymptotic giant branch stars
9%
catalogs
9%
hydrogen
9%
spectroscopy
9%
color
8%
inclination
8%
ejection
8%
local thermodynamic equilibrium
7%
spectrographs
7%
spectroscopic analysis
7%
space density
6%
metals
6%
kinematics
6%
extinction
6%
Extreme Ultraviolet Explorer satellite
6%
nuclei
6%
mass ratios
6%
optical spectrum
6%
metallicity
6%
radii
6%
luminosity
6%
Earth & Environmental Sciences
project
15%
spectroscopy
13%
helium
12%
atmosphere
10%
extinction
10%
parameter
10%
luminosity
8%
gravity
8%
hydrogen
8%
young
7%
detection
7%
distribution
6%
temperature
6%
metal
6%
diagram
6%
oxygen
5%
analysis
5%
