Category:Unsolved problems in physics

A

• Amorphous solids (7 C, 33 P)

B

• Black holes (6 C, 129 P, 1 F)

D

• Dark energy (23 P)
• Dark matter (2 C, 70 P)

M

• Magnetic monopoles (10 P)

P

• Physics beyond the Standard Model (6 C, 91 P)

T

• Tunguska event (26 P)

• List of unsolved problems in physics

A

• Accretion disk

B

• Ball lightning
• Baryogenesis
• Baryon asymmetry
• BGS conjecture

C

• Color confinement
• Cosmic coincidence
• Cuspy halo problem

D

• Dark energy
• Dark Energy Spectroscopic Instrument
• Dwarf galaxy problem
• Dynamo theory

E

• EMC effect

F

• Flatness problem
• Flyby anomaly
• Fractional quantum Hall effect

G

• Gallium anomaly
• Generalized uncertainty principle
• Glueball
• Gravitational wave
• Greisen–Zatsepin–Kuzmin limit

H

• Hessdalen lights
• Hierarchy problem
• High-temperature superconductivity
• Hilbert's sixth problem

K

• Koide formula

L

• List of hypothetical particles
• List of particles
• Long delayed echo

M

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

N

• Naga fireball
• Navier–Stokes existence and smoothness
• Numerical sign problem

P

• Physics beyond the Standard Model
• Proton radius puzzle
• Proton spin crisis

Q

• QCD matter
• Quark star

S

• Shower-curtain effect
• SIC-POVM
• Simon problems
• Amorphous solid
• Sonoluminescence
• Strange matter
• Strangelet
• Strong CP problem
• Superconductivity

T

• Time perception
• Tunguska event

U

• Unified field theory

Y

• Yang–Mills existence and mass gap