Physics, Pixelated
The Cosmological Lithium Problem: Big Bang’s Mi...
The Big Bang’s first minutes forged hydrogen, helium and a trace of lithium, and the theory matches deuterium and helium beautifully. Lithium-7 is the odd one out: the oldest stars...
The Cosmological Lithium Problem: Big Bang’s Mi...
The Big Bang’s first minutes forged hydrogen, helium and a trace of lithium, and the theory matches deuterium and helium beautifully. Lithium-7 is the odd one out: the oldest stars...
Where Does the Proton’s Mass Come From? (Hint: ...
A proton weighs 938 MeV/c², but its two up quarks and one down quark add up to only about 9 MeV/c², roughly 1%. The rest is energy: the motion of...
Where Does the Proton’s Mass Come From? (Hint: ...
A proton weighs 938 MeV/c², but its two up quarks and one down quark add up to only about 9 MeV/c², roughly 1%. The rest is energy: the motion of...
What Is a Superfluid, and Why Does Helium Climb...
Cool liquid helium below 2.17 kelvin and it turns into a superfluid: it pours through gaps too fine for ordinary liquids, creeps up the walls of its container and can...
What Is a Superfluid, and Why Does Helium Climb...
Cool liquid helium below 2.17 kelvin and it turns into a superfluid: it pours through gaps too fine for ordinary liquids, creeps up the walls of its container and can...
Why Do Charged Particles Spiral in a Magnetic F...
A magnetic field pushes a moving charge sideways, never forwards, so the charge curves into a circle, or a helix if it also drifts along the field. The time per...
Why Do Charged Particles Spiral in a Magnetic F...
A magnetic field pushes a moving charge sideways, never forwards, so the charge curves into a circle, or a helix if it also drifts along the field. The time per...
What Is Spaghettification? Tidal Forces Near a ...
Spaghettification is the stretching of an object by tidal forces: gravity pulls harder on the near end than the far end. Near a stellar-mass black hole it would tear a...
What Is Spaghettification? Tidal Forces Near a ...
Spaghettification is the stretching of an object by tidal forces: gravity pulls harder on the near end than the far end. Near a stellar-mass black hole it would tear a...
What Is Degeneracy Pressure, and What Holds Up ...
A white dwarf has no fusion left to hold it up. What stops it collapsing is electron degeneracy pressure: the Pauli exclusion principle forces electrons into ever-higher momentum states as...
What Is Degeneracy Pressure, and What Holds Up ...
A white dwarf has no fusion left to hold it up. What stops it collapsing is electron degeneracy pressure: the Pauli exclusion principle forces electrons into ever-higher momentum states as...