Physics & Astronomy
accretion disks
24%
active galactic nuclei
24%
anomalies
19%
astrophysics
82%
atoms
12%
chemical composition
21%
coefficients
12%
collisions
53%
configurations
9%
electron impact
71%
electron-ion recombination
34%
electronics
37%
electrons
20%
estimates
13%
excitation
34%
expansion
11%
Far UV Spectroscopic Explorer
37%
flow velocity
19%
galaxies
17%
H II regions
29%
interstellar gas
32%
ions
100%
line spectra
45%
molecules
12%
newton
23%
photons
13%
physics
15%
planetary nebulae
57%
proposals
22%
spectroscopy
12%
stellar atmospheres
31%
supernova remnants
27%
temperature
12%
trends
13%
universe
38%
wavelengths
11%
x rays
10%
XMM-Newton telescope
26%
Earth & Environmental Sciences
calculation
19%
collision
30%
comparison
7%
electron
49%
electronics
59%
ion
45%
matrix
42%
shell
13%
temperature
6%
trend
8%