Catalog 003 — Spectra

Read by its light.

Hydrogen gives off four wavelengths and nothing else. That signature is how you find it nine billion light years away.

Balmer series · H I

656.3 · 486.1 · 434.0 · 410.2 nm

Pick what it is. Then what it’s about.

Two questions instead of thirty series names. Both are optional, and they combine.

Sweatpants

$72

Fleece sweatpants with the Lunthra mark embroidered at the hip. The mark is a five-fold Penrose rosette — the same…