Subject
Astronomy
Observations, Astronomical.
980
Physics.
Astrophysics.
524
Geophysics.
147
Gravitation.
130
Space sciences.
65
Nuclear physics.
64
Hadrons.
56
Heavy ions.
56
Atoms.
42
Cosmology.
40
Astronomy.
35
Statistics.
35
Elementary particles (Physics).
33
Quantum field theory.
33
Planetology.
28
Dynamical systems.
18
Statistical physics.
18
Measurement.
14
Physical measurements.
14
History.
12
Nuclear fusion.
11
Optics.
11
Atmospheric sciences.
10
Quantum physics.
10
Automotive engineering.
9
Optoelectronics.
9
Plasmons (Physics).
9
Social sciences.
9
Continuum physics.
7
Electrical engineering.
7
Fluids.
7
Mechanics.
7
Microscopy.
7
Solid state physics.
7
Spectroscopy.
7
Earth sciences.
6
Quantum computers.
6
Spintronics.
6
Thermodynamics.
6
Astrobiology.
5
Condensed matter.
5
Geometry.
5
Physical chemistry.
5
Sociology.
5
Acoustics.
4
Applied mathematics.
4
Atomic structure.
4
Computer mathematics.
4
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