Physics & Astronomy
galaxies
100%
stars
98%
globular clusters
68%
metallicity
61%
supernovae
54%
European Southern Observatory
45%
galactic bulge
42%
ligands
37%
luminosity
37%
metals
31%
photometry
31%
collisions
31%
gravitation
30%
detectors
30%
reactivity
30%
telescopes
29%
catalogs
26%
light curve
26%
density functional theory
24%
halos
24%
radial velocity
23%
interactions
23%
dwarf galaxies
23%
Magellanic clouds
22%
open clusters
21%
color
21%
energy
21%
planets
20%
spectrographs
19%
leptons
19%
electronics
19%
star formation
18%
electrons
18%
decay
18%
molecules
17%
orbitals
17%
stellar mass
17%
proper motion
17%
observatories
17%
Higgs bosons
16%
bosons
16%
variable stars
16%
protons
16%
synthesis
16%
x rays
15%
spectroscopy
15%
characterization
15%
massive compact halo objects
15%
estimates
15%
star clusters
15%
dark matter
15%
simulation
15%
radii
14%
atoms
14%
quasars
14%
orbits
14%
rings
14%
kinematics
14%
galactic evolution
13%
high resolution
13%
explosions
13%
time measurement
13%
extinction
13%
copper
13%
extrasolar planets
13%
dust
12%
color-magnitude diagram
12%
scalars
12%
electronic structure
12%
Diels-Alder reactions
12%
clumps
12%
histories
11%
transit
11%
hydrogen
11%
quarks
11%
profiles
11%
active galactic nuclei
11%
cycloaddition
11%
Hubble Space Telescope
11%
hadrons
11%
geometry
11%
transverse momentum
10%
infrared photometry
10%
imines
10%
molecular orbitals
10%
signatures
10%
iron
10%
symmetry
9%
acids
9%
oxygen
9%
vapor phases
9%
strings
9%
confidence
9%
cross sections
9%
fragments
9%
gases
9%
cations
9%
tensors
9%
predictions
9%
universe
8%
Chemical Compounds
Density Functional Theory
42%
Molecular Cluster
33%
Ligand
30%
Energy
23%
Electrophilicity
21%
Molecule
20%
Electron Localization
19%
Electronic State
19%
Orbital
18%
Electron Density
14%
Electron Particle
14%
Optical Property
14%
Electronic Property
14%
Electron Spin
12%
Molecular Dynamics
12%
Charge Transfer
12%
Simulation
12%
Carbon Atom
11%
Luminiscence Type
11%
Metal
10%
Chemical Reactivity
10%
Ground State
10%
Cycloaddition
10%
Cation
10%
Reduction
10%
Potential Energy Surface
10%
Hydrogen Bond
10%
Antiferromagnetic
10%
Transition State
9%
Excited State
9%
Molecular Orbital
9%
Catalyst
9%
Dioxygen
9%
Molecular Structure
9%
Crystal Structure
8%
Magnetic Field
8%
Nucleophilicity
8%
Hydrogen
8%
Substitution Reaction
8%
Metallocene
8%
Acid
8%
Schiff Base
8%
Ion
8%
Chemical Potential
8%
Application
8%
Frontier Orbital
7%
Hydrogenation
7%
Anion
7%
Surface
7%
Drug
7%
Oxidation Reaction
7%
Solvent Effect
7%
Substituent Effect
7%
Solvent
7%
Spin-Orbit Coupling
6%
Compound Isomer
6%
Proton Transfer
6%
Lanthanoid Atom
6%
S-Indacene
6%
Decomposition
6%
Gold Nanoparticle
6%
Behavior as Electrode
6%
Cyclic Voltammetry
6%
Antioxidant Agent
6%
Gibbs Free Energy
6%
Electron Delocalization
6%
Chemistry
5%
Dye
5%
Force
5%
Electronic Transition
5%
Regioselectivity
5%
UV/VIS Spectroscopy
5%
Gas
5%
Gastroprotective
5%
Pyridine
5%
Environment
5%
Transition Element
5%
Band Gap
5%
Absorption Spectrum
5%
Polarizability
5%
Phthalocyanine
5%
Complexation
5%
Dendrimer
5%
Solvation
5%
Time
5%
Earth & Environmental Sciences
luminosity
58%
near infrared
40%
metal
30%
planet
22%
spectroscopy
22%
merger
21%
young
18%
diagram
18%
extinction
17%
distribution
17%
explosion
16%
detection
16%
observatory
16%
chemical
15%
kinematics
15%
dust
14%
parameter
14%
accretion
13%
project
12%
radio
12%
gas
12%
simulation
12%
analysis
12%
gamma radiation
10%
wavelength
10%
method
10%
ejecta
9%
history
9%
rate
8%
lithium
8%
energy
7%
outburst
7%
public
7%
comparison
7%
timescale
6%
erg
6%
program
6%
iron
6%
effect
5%
chemical composition
5%
calibration
5%
COSMOS
5%
trend
5%
code
5%
plateau
5%