NGC 1398 — Order Within the Spiral
A galaxy defined by symmetry and stillness.
In the constellation Fornax, about 65 million light-years away, lies NGC 1398, a majestic SB(rs)ab barred spiral galaxy whose near-perfect form contrasts sharply with the turbulent chaos often seen in its peers. A bright stellar bar cuts across the luminous core, encircled by a tightly wound inner ring, while faint spiral arms unwind gracefully into the surrounding disk.
The bulge glows in warm starlight — the combined radiance of older, evolved stars — while the delicate arms shimmer blue with younger populations and scattered dust lanes. Between the inner and outer spiral regions, subtle transitions mark resonance zones where the bar’s gravity organizes the orbits of stars and gas, maintaining the symmetry that defines the galaxy’s appearance.
Though tranquil in form, NGC 1398 is far from inert. Radio and infrared studies reveal residual gas inflow along the bar and weak circumnuclear star formation within the ring — signs of quiet evolution still at work. Around its outer rim, faint wisps of starlight suggest past interactions, now softened by time into a smooth halo.
In this image, the inner resonance ring stands out with a distinct pale golden hue, a color shaped by its older stellar population — a calm, mature contrast to the cooler, blue-tinged spiral arms that extend beyond. It’s a visual balance between age and youth, order and motion.
Spanning nearly 120 000 light-years and appearing about 6.9 × 4.0 arcminutes across the sky, NGC 1398 offers a glimpse of gravitational equilibrium on a galactic scale — a system that has endured its formative encounters and settled into harmony.
Imaged in LRGB and H alpha on my Planewave CDK 1000 at Observatorio El Sauce, Chile.
Image acquisition and processing: Mike Selby