Image Details
Caption: Figure 1.
Slice of the Universe mapped by DR1 drawn from a small wedge of the DESI footprint between ±5° in decl. out to z ≈ 4. We render the four major extragalactic samples—BGS galaxies, LRGs, ELGs, and QSOs—using yellow, orange, blue, and green points, respectively. Within each target class, the shade of the color maps to decl. (lighter colors correspond to higher decl.). The inset shows a subset of the BGS survey extending out to redshift z = 0.2, highlighting the LSS traced by galaxies in the densest survey region. For reference, this small wedge of the BGS survey represents less than 0.1% of the comoving cosmological volume in DR1. Also note the black streaks of apparent missing points (most visible at right ascensions between 40° and 300°), which are due to incomplete survey coverage in DR1, which will be populated in future data releases (see Section 3.2).
© 2026. The Author(s). Published by the American Astronomical Society.