An unusual galaxy with a well-defined luminous ring around a bright core. The ring can appear smooth and regular, or knotted or warped, and may include gas and dust in addition to stars. Such an arrangement may result from a collision of a disk galaxy with another smaller galaxy, which passes through the disk. An example of a collisional ring is the Cartwheel Galaxy. Other rings may be formed by the action of galactic bars or orbital resonances.
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- Minkowski’s inequality
- minnow
- Minoan civilization
- minor arc
- minor axis
- minor fold
- minority carrier
- minority shareholder
- minor planet
- Minor Planet Center
- minor planets
- minor premise
- minor term
- Minotaur rockets
- Minot, George Richards
- Minsky, Marvin Lee
- mint
- Mintaka
- minterm
- minus
- minus 10 sequence
- minus or plus
- minus sign
- minute
- minute(angular measure)