Hubble Spies Swirling Spiral

Andrea Gianopoulos

July 25, 2025

A spiral galaxy with a disk made of several swirling arms. Patchy blue clouds of gas speckle the disk where stars are forming and lighting the gas around them. The core of the galaxy is large and shines brightly gold, while the spiral arms are a paler and faint reddish color. Neighboring galaxies – from small, elongated spots to larger swirling spirals – are visible across the black background.

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Hubble Spies Swirling Spiral

The NASA/ESA Hubble Space Telescope image features the spiral galaxy NGC 3285B, a member of the Hydra I cluster of galaxies.ESA/Hubble & NASA, R. J. Foley (UC Santa Cruz)

The swirling spiral galaxy in this NASA/ESA Hubble Space Telescope image is NGC 3285B, which resides 137 million light-years away in the constellation Hydra (the Water Snake). Hydra has the largest area of the 88 constellations that cover the entire sky in a celestial patchwork. It’s also the longest constellation, stretching 100 degrees across the sky. It would take nearly 200 full Moons, placed side by side, to reach from one side of the constellation to the other.

NGC 3285B is a member of the Hydra I cluster, one of the largest galaxy clusters in the nearby universe. Galaxy clusters are collections of hundreds to thousands of galaxies bound to one another by gravity. The Hydra I cluster is anchored by two giant elliptical galaxies at its center. Each of these galaxies is about 150,000 light-years across, making them about 50% larger than our home galaxy, the Milky Way.

NGC 3285B sits on the outskirts of its home cluster, far from the massive galaxies at the center. This galaxy drew Hubble’s attention because it hosted a Type Ia supernovain 2023. Type Ia supernovae happen when a type of condensed stellar core called a white dwarf detonates, igniting a sudden burst of nuclear fusion that briefly shines about 5 billion times brighter than the Sun. The supernova, named SN 2023xqm, is visible here as a blueish dot on the left edge of the galaxy’s disk.

Hubble observed NGC 3285B as part of an observing program that targeted 100 Type Ia supernovae. By viewing each of these supernovae in ultraviolet, optical, and near-infrared light, researchers aim to disentangle the effects of distance and dust, both of which can make a supernova appear redder than it actually is. This program will help refine cosmic distance measurements that rely on observations of Type Ia supernovae.

Text Credit: ESA/Hubble

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Media Contact:

Claire Andreoli (claire.andreoli@nasa.gov)NASA’s Goddard Space Flight Center, Greenbelt, MD