Ring galaxies often have nearby companions. What does that suggest?

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Ring galaxies often have nearby companions. What does that suggest?

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Answer 1

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The origin of ring galaxies is often debated. Some scientists believe that ring galaxies have formed when a smaller galaxy passes through a larger one, leading to a gravitational disruption and the formation of a ring galaxy (the larger one).

Another theory suggests that ring galaxies are formed via natural accretion of dust , just like the planets in our solar system formed from a protoplantery disc.

The presence of nearby companions could serve as evidence for the first theory of formation, if their direction, velocity and age can be determined, along with the age of the ring galaxies that they accompany.

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Ring galaxies often have nearby companions. What does that suggest?

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Ring galaxies often have nearby companions. What does that suggest?

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