Physics & Astronomy
asymptotic giant branch stars
100%
quasars
41%
chemistry
40%
vapor phases
32%
synthesis
29%
oxygen
24%
photons
22%
fine structure
22%
radiation
22%
silicon
22%
gases
21%
silicates
17%
radii
16%
three dimensional models
15%
reverberation
15%
gas density
15%
atomic energy levels
14%
predictions
14%
optical thickness
14%
subtraction
14%
reaction kinetics
12%
chemical reactions
12%
extinction
11%
dust
11%
asymmetry
10%
molecules
10%
envelopes
10%
physics
8%
approximation
7%
water
6%
silicon oxides
6%
molecular weight
5%
interactions
5%
Earth & Environmental Sciences
silicon
37%
oxygen
26%
silicate
11%
physical conditions
11%
optical depth
10%
prediction
10%
radiation
9%
physics
8%
energy
5%