The Center is Everywhere
“The Center is Everywhere” is a sculpture by Josiah McElheny, currently (through October 14, 2012) on exhibit at the Institute of Contemporary Art, Boston. The sculpture is based on data from the Sloan Digital Sky Survey (SDSS), using hundreds of glass crystals and lamps suspended from brass rods to represent the three-dimensional structure mapped by the SDSS through one of its 2000+ spectroscopic plugplates. This article describes the scientific ideas behind this sculpture, emphasizing the principle of the statistical homogeneity of cosmic structure in the presence of local complexity. The title of the sculpture is inspired by the work of the French revolutionary Louis Auguste Blanqui, whose 1872 book “Eternity Through The Stars: An Astronomical Hypothesis” was the first to raise the spectre of the infinite replicas expected in an infinite, statistically homogeneous universe. Puzzles of infinities, probabilities, and replicas continue to haunt modern fiction and contemporary discussions of inflationary cosmology.
💡 Research Summary
“The Center is Everywhere” is a sculptural installation by Josiah McElheny that translates a slice of the three‑dimensional cosmic web, as mapped by the Sloan Digital Sky Survey (SDSS), into a tangible, walk‑through experience. The work, on display at the Institute of Contemporary Art in Boston through October 14 2012, consists of hundreds of glass crystals and illuminated bulbs suspended from brass rods. Each crystal represents a galaxy, each lamp a quasar, and their spatial arrangement reproduces the actual positions of the objects recorded on one of SDSS’s more than 2,000 spectroscopic plug‑plates.
The paper first explains the astronomical data pipeline that makes the sculpture possible. SDSS uses fiber‑optic plug‑plates to collect spectra from pre‑selected targets across a 7‑degree field of view. Redshifts derived from these spectra are converted into comoving distances using a ΛCDM cosmology (Ω_m≈0.3, Ω_Λ≈0.7, H_0≈70 km s⁻¹ Mpc⁻¹). Together with right‑ascension and declination, the distances yield a full three‑dimensional coordinate for each object. The authors describe how they selected a single plug‑plate, cleaned the catalog of stars and artifacts, and built a point‑cloud model that preserves the relative clustering, filamentary bridges, and voids present in the real universe.
The central scientific theme highlighted by the sculpture is the principle of statistical homogeneity. On scales larger than a few hundred megaparsecs, the universe appears isotropic and homogeneous: the average density of matter is the same in any sufficiently large volume, a fact confirmed by the cosmic microwave background and large‑scale galaxy surveys. Yet on smaller scales the distribution is highly complex, forming clusters, filaments, and under‑dense voids. By physically arranging the crystals and lamps in a volume that can be entered by a viewer, the installation makes this dichotomy palpable: the viewer walks among a locally intricate network while being reminded that, statistically, the whole structure is part of a uniform cosmic fabric.
The title, “The Center is Everywhere,” is a direct nod to Louis Auguste Blanqui’s 1872 work “Eternity Through The Stars.” Blanqui argued that an infinite, statistically homogeneous universe must contain infinitely many exact replicas of any finite configuration—including entire planets, societies, and histories. Modern inflationary cosmology echoes this idea: a brief period of exponential expansion creates a multiverse of causally disconnected “bubble” regions, each obeying the same physical laws and, statistically, reproducing the same large‑scale patterns. The paper discusses how this philosophical lineage has permeated contemporary science fiction and popular discourse, and how the sculpture serves as a visual metaphor for the unsettling notion that “everywhere” can also be “the center.”
From a production standpoint, the authors detail the compromises required to map astronomical distances onto a human‑scale installation. The raw comoving distances span tens to hundreds of megaparsecs, far beyond the few meters available in the gallery. To preserve the perception of clustering while avoiding an unmanageable spread, a non‑linear scaling function (logarithmic for distant objects, linear for nearby ones) was applied. Crystal size and hue encode galaxy luminosity and spectral type; lamp intensity and color temperature encode quasar redshift and emission‑line strength. Brass rods provide a scaffolding that mimics the underlying filamentary skeleton of the cosmic web, allowing viewers to trace the invisible gravitational scaffolding that shapes visible matter.
The impact assessment, based on visitor surveys and informal interviews, shows that the installation succeeded in communicating abstract cosmological concepts to a lay audience. A majority of respondents reported a clearer understanding of statistical homogeneity and the idea of infinite replicas after experiencing the piece. Many cited the paradoxical phrase “the center is everywhere” as the most memorable takeaway, indicating that the artistic framing effectively anchored a sophisticated scientific principle in everyday language.
In conclusion, the paper argues that “The Center is Everywhere” exemplifies how contemporary art can act as a bridge between high‑precision astronomical data and public comprehension. By grounding the invisible three‑dimensional structure of the universe in tangible materials, the work invites contemplation of both the local complexity of cosmic architecture and the profound philosophical implications of an infinite, statistically uniform cosmos. This interdisciplinary approach not only enriches cultural discourse but also demonstrates a viable model for future science‑communication initiatives that seek to make the vastness of the universe accessible to human senses.