Galaxy morphology · Sa–Sc
Spiral Galaxy
A flattened, rotating disk of stars, gas, and dust wound into spiral arms, with a central bulge. The arms are where new stars form, tracing waves of star formation sweeping through the disk.
Highlights
- ›Disks of ongoing star formation
Examples & connections
Knowledge connections
- Associated withAndromeda Galaxy
- Associated withWhirlpool Galaxy
- Associated withTriangulum Galaxy
- Associated withGalaxy Evolution
- Associated withTully–Fisher Relation
- Associated withGalaxy Morphology Classification
- Associated withGalaxy Zoo
Sources
The primary and reference sources this topic draws on.
- NASANational Aeronautics and Space Administration
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.