SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/astro-irregular-galaxy-shape

Which galaxy category lacks a regular spiral or elliptical shape?

An irregular galaxy lacks either regular form.

Start playing free

  1. Barred spiral
  2. Elliptical
  3. Irregular ✔

Why: Galaxy morphology begins with visible structure. Systems that fit neither the spiral nor elliptical families are classified as irregular.

Huh, didn't know that: Some irregular galaxies were distorted by gravitational interactions with neighbors.

The dad joke
Irregular galaxies never worry about staying in shape.
Like this card?
Play the game

References

Answer: Irregular. Galaxy morphology begins with visible structure. Systems that fit neither the spiral nor elliptical families are classified as irregular.

  1. Galaxies science.nasa.gov/universe/galaxies
    Galaxies come in a variety of shapes, mostly spirals and ellipticals, as well as those with less orderly appearances, usually dubbed irregular.
    Checked 2026-10-10.

Think this answer is wrong? Tap "Challenge this answer" on the card in the game and tell us why.

Test yourself in the game

Astronomy & SpaceWhich kind of light has the shortest wavelength, under 0.01 nanometer?Astronomy & SpaceRoughly what wavelength range is visible light?Astronomy & SpaceWho discovered infrared light in 1800 by putting a thermometer past the red end of a spectrum?

That's stuff everyone should know.