Acoustic peak
A baryon acoustic wave expands as a ring from a central overdensity and freezes at the sound horizon, where a ruler tick records its radius.
CSS
Cosmology
15 animationsCMB anisotropy
A lattice of temperature cells inside an oval all-sky frame brightens and dims in a mottled pattern as the map is scanned across.
CSSComoving grid
A comoving coordinate grid dilates uniformly about the frame centre while the galaxies pinned to its intersections keep their indices.
CSSCosmic web
Density travels along the filaments of a cosmic web toward the cluster nodes, which swell as each pulse of matter arrives.
CSSDark matter halo
Nested density contours around a halo and its subhalo breathe outward while a profile trace runs down the radial section beside them.
CSSE-mode polarization
A field of short polarization ticks rotates from radial to tangential around two cold spots, tracing the E-mode pattern.
CSSHubble flow
Scattered galaxies on a velocity-versus-distance plot drift outward along a fitted recession line whose slope stays fixed.
CSSN-body step
Simulation particles condense out of a near-uniform lattice into clustered knots and then retrace back to uniformity.
CSSParticle horizon
Comoving shells sweep outward past a fixed observer while the horizon radius rule advances its tick along a distance scale.
CSSPast light cone
A past light cone opens downward on a conformal diagram as the lookback rule sweeps and successive epoch slices are crossed.
CSSPower spectrum
The angular power spectrum with its acoustic peaks is drawn across a log axis while binned error bars settle onto the curve behind it.
CSSRedshift
A comb of absorption lines migrates along a wavelength rule toward the red end while the rest-frame reference comb holds its position.
CSSScale factor
The expansion-history curve a(t) traces from the origin through its decelerating and accelerating arms while a readout marker rides the drawn end.
CSSVoid field
Closed void contours grow against one another across a survey field while the wall segments between them thin and fade.
CSSWeak lensing
A grid of shear ellipses stretches and swings tangential as a foreground mass peak drifts across the field behind them.
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