Category:Unsolved problems in physics

• List of unsolved problems in physics (physics)

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• List of unsolved problems in astronomy (astronomy)

A

• Accretion disk (astronomy)
• Amorphous solid (physics)

B

• Ball lightning (physics)
• Baryogenesis (physics)
• Baryon asymmetry (astronomy)

C

• Color confinement (physics)
• Cuspy halo problem (astronomy)

D

• Dark energy (astronomy)
• Dark Energy Spectroscopic Instrument (astronomy)
• Dwarf galaxy problem (astronomy)
• Dynamo theory (physics)

E

• EMC effect (physics)

F

• Flatness problem (astronomy)
• Flyby anomaly (physics)
• Fractional quantum Hall effect (physics)
• Fredkin finite nature hypothesis (physics)

G

• Generic object of dark energy (astronomy)
• Glueball (physics)
• Gravitational wave (astronomy)
• Greisen–Zatsepin–Kuzmin limit (astronomy)

H

• Hessdalen lights (physics)
• Hierarchy problem (physics)
• High-temperature superconductivity (physics)
• Hilbert's sixth problem (computing)
• Holeum (physics)

K

• Koide formula (physics)

L

• List of particles (physics)
• Long delayed echo (physics)

M

• M82 X-2 (astronomy)
• Magnetic monopole (physics)
• Mass in general relativity (astronomy)
• Measure problem (cosmology) (astronomy)
• Michigan Spin Physics Center (physics)
• Modified Newtonian dynamics (astronomy)
• Modified Newtonian dynamics (physics)
• Mpemba effect (physics)

N

• Naga fireball (physics)
• Navier–Stokes existence and smoothness (computing)
• Numerical sign problem (physics)

P

• Physics beyond the Standard Model (physics)
• Proton spin crisis (physics)

Q

• QCD matter (physics)
• Quantized inertia (physics)
• Quark star (astronomy)

S

• Shower-curtain effect (physics)
• SIC-POVM (computing)
• Simon problems (computing)
• Sonoluminescence (physics)
• Strange matter (physics)
• Strangelet (astronomy)
• Strong CP problem (physics)
• Superconductivity (physics)

T

• Time perception (philosophy)
• Tunguska event (physics)

U

• Unified field theory (physics)

Y

• Yang–Mills existence and mass gap (computing)