spiral galaxies
Swirling star systems
Spiral galaxies are disk-shaped galaxies with curved arms of stars, gas, and dust radiating from a central bulge.
The Milky Way is a spiral galaxy.
These structures rotate, with the spiral arms marking regions of active star formation.
They represent one of the main galaxy types, alongside elliptical and irregular galaxies.
- starsLuminous celestial bodies
- Milky WayGalaxy containing Earth
- quasarsExtremely luminous galactic centers
- stellar populationsStars grouped by age and composition
- Cepheid variablesStars with periodic luminosity
star formation · dark matter · Hubble · deep field · arms · telescope · supermassive · nebula · cluster · elliptical · vortex · swirl · disk · celestial · barred · luminous · black hole · supermassive black hole
- astronomystars, moon, sun, planet, planets
- cosmosuniverse, stars, star, planets, cosmos
- GalaxiesMilky Way, Andromeda, ellipticals, dwarfs, Whirlpool
- Deep-Sky ObjectsOrion Nebula, Crab Nebula, Horsehead Nebula, nebula, star cluster
- Fractalsfractal, fractals, self-similar, Hausdorff dimension, recursion
- galaxy clusterssuperclusters