DESI's Petals (IMAGE)

Association of Universities for Research in Astronomy (AURA)

DESI's Petals

Caption

DESI's robotic fiber positioners, which gather the light from individual galaxies and stars, are arranged in 10 wedge-shaped modules called "petals". Left: a portion of the night sky, studied by one petal, that includes the galaxy M33. Blue circles demarcate the region of sky that can be studied by each of the 500 fibers in the petal; each fiber can point to a star or galaxy within its circle. Right: The hydrogen line emission detected by DESI from M33, shown as a color map, with brighter colors indicating brighter emission.

Credit

DESI Collaboration; NSF's National Optical-Infrared Astronomy Research Laboratory

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