More from Astronomy & The Sky
Other simulators in this category — or see all 51.
Big Bang Nucleosynthesis (BBN)
Light-element abundance curves H, ⁴He, D, ³He, ⁷Li vs cosmic time / temperature. Weak freeze-out, neutron decay gap, deuterium bottleneck → Y_p ≈ 0.245. Slide η₁₀ and N_eff over the classic BBN curves; observed values overlaid.
EM Calorimeter Shower (Heitler / Rossi)
Toy electromagnetic cascade in a calorimeter: γ → e⁺e⁻, e⁻ → e⁻γ each X₀, with critical-energy cutoff E_c. Animate the branching tree, see N_max ≈ E₀/E_c, t_max ≈ log₂(E₀/E_c) live; presets for Pb, Cu, Si, air.
Bremsstrahlung & Synchrotron Radiation Pattern
Polar plot of dP/dΩ for an accelerating charge: a ∥ v (linear / brems) and a ⊥ v (circular / synchrotron). Pull β = v/c toward 1 — Larmor donut collapses into a forward beam of half-angle ≈ 1/γ; ω_g, ω_c shown for given B.
Venus Phases (Galileo)
Heliocentric geometry: full disk vs crescent at inferior conjunction; Earth-view inset.
Stellar Aberration
Bradley: telescope tilt v/c ~ 10⁻⁴ rad; annual ~20.5″ — not parallax.
Milankovitch Cycles
e, obliquity, precession → toy high-latitude insolation curve; ice-age pacing context.